Super Micro Computer (SMCI) 10-K 27 Aug 21 2021 FY Annual report Financial data

Cover

Cover - USD ($)	12 Months Ended
	Jun. 30, 2021	Jul. 31, 2021	Dec. 31, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Jun. 30, 2021
Current Fiscal Year End Date	--06-30
Document Transition Report	false
Entity File Number	001-33383
Entity Registrant Name	Super Micro Computer, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0353939
Entity Address, Address Line One	980 Rock Avenue
Entity Address, City or Town	San Jose
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95131
City Area Code	408
Local Phone Number	503-8000
Title of 12(b) Security	Common Stock, $0.001 par value per share
Trading Symbol	SMCI
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 1,374,947,450
Entity Common Stock, Shares Outstanding (in shares)		50,590,466
Documents Incorporated by Reference	DOCUMENTS INCORPORATED BY REFERENCE None
Entity Central Index Key	0001375365
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	false

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Current assets:
Cash and cash equivalents	$ 232,266	$ 210,533
Accounts receivable, net of allowances of $2,591 and $4,586 at June 30, 2021 and 2020, respectively (including amounts receivable from related parties of $8,678 and $8,712 at June 30, 2021 and 2020, respectively)	463,834	403,745
Inventories	1,040,964	851,498
Prepaid expenses and other current assets (including receivables from related parties of $23,748 and $19,791 at June 30, 2021 and 2020, respectively)	130,195	126,985
Total current assets	1,867,259	1,592,761
Investment in equity investee	4,578	2,703
Property, plant and equipment, net	274,713	233,785
Deferred income taxes, net	63,288	54,898
Other assets	32,126	34,499
Total assets	2,241,964	1,918,646
Current liabilities:
Accounts payable (including amounts due to related parties of $70,096 and $72,368 at June 30, 2021 and 2020, respectively)	612,336	417,673
Accrued liabilities (including amounts due to related parties of $18,528 and $16,206 at June 30, 2021 and 2020, respectively)	178,850	155,401
Income taxes payable	12,741	4,700
Short-term debt	63,490	23,704
Deferred revenue	101,479	106,157
Total current liabilities	968,896	707,635
Deferred revenue, non-current	100,838	97,612
Long-term debt	34,700	5,697
Other long-term liabilities (including related party balance of $0 and $1,699 at June 30, 2021 and 2020, respectively)	41,132	41,995
Total liabilities	1,145,566	852,939
Commitments and contingencies (Note 16)
Stockholders’ equity:
Common stock and additional paid-in capital, $0.001 par value, Authorized Shares: 100,000,000, Outstanding shares: 52,408,703 and 49,956,288 at June 30, 2020 and 2019 respectively, Issued shares: 53,741,828 and 51,289,413 at June30, 2020 and 2019 respectively	438,012	389,972
Treasury stock (at cost), 0 and 1,333,125 shares at June 30, 2021 and 2020, respectively	0	(20,491)
Accumulated other comprehensive income (loss)	453	(152)
Retained earnings	657,760	696,211
Total Super Micro Computer, Inc. stockholders’ equity	1,096,225	1,065,540
Noncontrolling interest	173	167
Total stockholders’ equity	1,096,398	1,065,707
Total liabilities and stockholders’ equity	$ 2,241,964	$ 1,918,646

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Current assets:
Accounts receivable, allowances	$ 2,591	$ 4,586
Accounts receivable, related party	8,678	8,712
Prepaid expenses, related party	23,748	19,791
Current liabilities:
Accounts payable, related party	70,096	72,368
Accrued liabilities, related party	18,528	16,206
Other long-term liabilities, related party	$ 0	$ 1,699
Stockholders’ equity:
Common stock and additional paid-in capital, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares outstanding (in shares)	50,582,078	52,408,703
Common stock, shares issued (in shares)	50,582,078	53,741,828
Treasury stock, shares (in shares)	0	1,333,125

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Net sales (including related party sales of $79,018, $85,759, and $69,906 in fiscal years 2021, 2020 and 2019, respectively)	$ 3,557,422	$ 3,339,281	$ 3,500,360
Cost of sales (including related party purchases of $239,558, $283,056, and $276,843 in fiscal years 2021, 2020 and 2019, respectively)	3,022,884	2,813,071	3,004,838
Gross profit	534,538	526,210	495,522
Operating expenses:
Research and development	224,369	221,478	179,907
Sales and marketing	85,683	85,137	77,154
General and administrative	100,539	133,941	141,228
Total operating expenses	410,591	440,556	398,289
Income from operations	123,947	85,654	97,233
Other (expense) income, net	(2,834)	1,410	(1,020)
Interest expense	(2,485)	(2,236)	(6,690)
Income before income tax provision	118,628	84,828	89,523
Income tax provision	(6,936)	(2,922)	(14,884)
Share of income (loss) from equity investee, net of taxes	173	2,402	(2,721)
Net income	$ 111,865	$ 84,308	$ 71,918
Net income per common share:
Basic (in dollars per share)	$ 2.19	$ 1.65	$ 1.44
Diluted (in dollars per share)	$ 2.09	$ 1.60	$ 1.39
Weighted-average shares used in calculation of net income per common share:
Basic (in shares)	51,157	50,987	49,917
Diluted (in shares)	53,507	52,838	51,716

CONSOLIDATED STATEMENTS OF OP_2

CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Revenue from related parties	$ 79,018	$ 85,759	$ 69,906
Purchases from related party	$ 239,558	$ 283,056	$ 276,843

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 111,865	$ 84,308	$ 71,918
Other comprehensive income (loss), net of tax:
Foreign currency translation gain (loss)	605	(72)	(245)
Total other comprehensive income (loss)	605	(72)	(245)
Total comprehensive income	$ 112,470	$ 84,236	$ 71,673

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock and Additional Paid-In Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Non-controlling Interest	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, AdjustmentCommon Stock and Additional Paid-In Capital	Cumulative Effect, Period of Adoption, AdjustmentRetained Earnings
Shares outstanding, beginning balance (in shares) at Jun. 30, 2018		50,914,571	1,333,125
Stockholders' equity, beginning balance at Jun. 30, 2018	$ 843,652	$ 331,550	$ (20,491)	$ 165	$ 532,271	$ 157	$ 7,714	$ 0	$ 7,714
Increase (Decrease) in Stockholders' Equity
Release of common stock shares upon vesting of restricted stock units (in shares)		549,886
Release of common stock shares upon vesting of restricted stock units	0	$ 0
Shares withheld for the withholding tax on vesting of restricted stock units (in shares)		(175,044)
Shares withheld for the withholding tax on vesting of restricted stock units	(3,051)	$ (3,051)
Stock-based compensation	21,184	$ 21,184
Foreign currency translation gain (loss)	(245)			(245)
Net income	71,922				71,918	4
Shares outstanding, ending balance (in shares) at Jun. 30, 2019		51,289,413	1,333,125
Stockholders' equity, ending balance at Jun. 30, 2019	$ 941,176	$ 349,683	$ (20,491)	(80)	611,903	161
Increase (Decrease) in Stockholders' Equity
Exercise of stock options, net of taxes (in shares)	1,812,000	1,804,789
Exercise of stock options, net of taxes	$ 28,343	$ 28,343
Release of common stock shares upon vesting of restricted stock units (in shares)		979,274
Release of common stock shares upon vesting of restricted stock units	0
Shares withheld for the withholding tax on vesting of restricted stock units (in shares)		(331,648)
Shares withheld for the withholding tax on vesting of restricted stock units	(8,243)	$ (8,243)
Stock-based compensation	20,189	$ 20,189
Foreign currency translation gain (loss)	(72)			(72)
Net income	$ 84,314				84,308	6
Shares outstanding, ending balance (in shares) at Jun. 30, 2020	52,408,703	53,741,828	1,333,125
Stockholders' equity, ending balance at Jun. 30, 2020	$ 1,065,707	$ 389,972	$ (20,491)	(152)	696,211	167
Increase (Decrease) in Stockholders' Equity
Exercise of stock options, net of taxes (in shares)	1,645,800	1,645,800
Exercise of stock options, net of taxes	$ 28,387	$ 28,387
Release of common stock shares upon vesting of restricted stock units (in shares)		1,011,406
Release of common stock shares upon vesting of restricted stock units	0
Shares withheld for the withholding tax on vesting of restricted stock units (in shares)		(274,620)
Shares withheld for the withholding tax on vesting of restricted stock units	$ (8,721)	$ (8,721)
Share repurchase and retirement (in shares)	(4,209,211)	(5,542,336)	1,333,125
Share repurchase and retirement	$ (130,000)	$ (175)	$ 20,491		(150,316)
Stock-based compensation	28,549	$ 28,549
Foreign currency translation gain (loss)	605			605
Net income	$ 111,871				111,865	6
Shares outstanding, ending balance (in shares) at Jun. 30, 2021	50,582,078	50,582,078	0
Stockholders' equity, ending balance at Jun. 30, 2021	$ 1,096,398	$ 438,012	$ 0	$ 453	$ 657,760	$ 173

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
OPERATING ACTIVITIES:
Net income	$ 111,865	$ 84,308	$ 71,918
Reconciliation of net income to net cash (used in) provided by operating activities:
Depreciation and amortization	28,185	28,472	24,202
Stock-based compensation expense	28,549	20,189	21,184
(Recoveries of) Allowance for doubtful accounts	(820)	(3,081)	7,058
Provision for excess and obsolete inventories	6,805	18,373	32,946
Other	(1,044)	1,364	733
Impairment of investments	0	0	2,661
Share of (income) loss from equity investee	(173)	(2,402)	2,721
Foreign currency exchange loss (gain)	2,482	1,008	(313)
Deferred income taxes, net	(8,390)	(13,772)	(17,100)
Changes in operating assets and liabilities:
Accounts receivable, net (including changes in related party balances of $34, $4,727 and $(10,357) in fiscal years 2021, 2020 and 2019, respectively)	(59,325)	(7,023)	85,027
Inventories	(196,271)	(199,683)	119,314
Prepaid expenses and other assets (including changes in related party balances of $(3,957), $1,511 and $2,714 in fiscal years 2021, 2020 and 2019, respectively)	(5,291)	(29,869)	8,410
Accounts payable (including changes in related party balances of $(2,272), $12,559 and $(18,001) in fiscal years 2021, 2020 and 2019, respectively)	189,309	59,889	(173,410)
Income taxes payable	8,041	(8,321)	5,831
Accrued liabilities (including changes in related party balances of $2,322, $5,670 and $(7,858) in fiscal years 2021, 2020 and 2019, respectively)	24,705	27,865	11,456
Deferred revenue	(1,452)	350	59,800
Other long-term liabilities (including changes in related party balances of $(1,699), $(1,301) and $(500) in fiscal years 2021, 2020 and 2019, respectively)	(4,220)	(8,001)	116
Net cash provided by (used in) operating activities	122,955	(30,334)	262,554
INVESTING ACTIVITIES:
Purchases of property, plant and equipment (including payments to related parties of $7,347, $4,386 and $4,472 in fiscal years 2021, 2020 and 2019, respectively)	(58,016)	(44,338)	(24,849)
Proceeds from sale of investment in a privately-held company	0	750	0
Net cash used in investing activities	(58,016)	(43,588)	(24,849)
FINANCING ACTIVITIES:
Proceeds from borrowings, net of debt issuance costs	127,059	164,791	41,760
Repayment of debt	(60,629)	(159,191)	(67,700)
Net repayment on asset-backed revolving line of credit, net of costs	0	(1,116)	(65,945)
Payment of other fees for debt financing	(561)	(650)	(625)
Proceeds from exercise of stock options	28,387	28,343	0
Changes in obligations under capital leases	25	(138)
Changes in obligations under capital leases			(267)
Payment of withholding tax on vesting of restricted stock units	(8,721)	(8,243)	(3,051)
Stock repurchases	(130,000)	0	0
Net cash (used in) provided by financing activities	(44,440)	23,796	(95,828)
Effect of exchange rate fluctuations on cash	560	376	(119)
Net increase (decrease) in cash, cash equivalents, and restricted cash	21,059	(49,750)	141,758
Cash, cash equivalents and restricted cash at beginning of year	212,390	262,140	120,382
Cash, cash equivalents and restricted cash at end of year	233,449	212,390	262,140
Supplemental disclosure of cash flow information:
Cash paid for interest	1,948	2,172	3,861
Cash paid for taxes, net of refunds	2,914	43,317	23,604
Non-cash investing and financing activities:
Unpaid property, plant and equipment purchases (including due to related parties of $400, $2,223 and $1,609 as of June 30, 2021, 2020 and 2019, respectively)	9,003	12,051	9,232
Equipment purchased under capital leases	3,258	0	0
Contribution of certain technology rights to equity investee	$ 0	$ 0	$ 3,000

CONSOLIDATED STATEMENTS OF CA_2

CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
OPERATING ACTIVITIES:
Accounts receivable, changes in related party balances	$ 34	$ 4,727	$ (10,357)
Prepaid expenses and other current assets, changes in related party balances	(3,957)	1,511	2,714
Accounts payable, changes in related party balances	(2,272)	12,559	(18,001)
Accrued liabilities, changes in related party balances	2,322	5,670	(7,858)
Other long-term liabilities, related party	(1,699)	(1,301)	(500)
Purchase of property, plant and equipment, related party	7,347	4,386	4,472
Unpaid property, plant and equipment, related party	$ 400	$ 2,223	$ 1,609

Organization and Summary of Sig

Organization and Summary of Significant Accounting Policies	12 Months Ended
	Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Summary of Significant Accounting Policies	Organization and Summary of Significant Accounting Policies Organization Super Micro Computer, Inc. (“Super Micro Computer”) was incorporated in 1993. Super Micro Computer is a global leader in server technology and green computing innovation. Super Micro Computer develops and provides high performance server and storage solutions based upon an innovative, modular and open-standard architecture. Super Micro Computer has operations primarily in the United States, the Netherlands, Taiwan, China and Japan. Basis of Presentation The accompanying consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”). The consolidated financial statements of Super Micro Computer include the accounts of Super Micro Computer and entities consolidated under the variable interest model or the voting interest model. Noncontrolling interests are not presented separately in the consolidated statements of operations, and consolidated statements of comprehensive income as the amounts are immaterial. All intercompany accounts and transactions of Super Micro Computer and its consolidated entities (collectively, the "Company") have been eliminated in consolidation. For equity investments over which the Company is able to exercise significant influence over the investee but does not control the investee, and is not the primary beneficiary of the investee’s activities are accounted for using the equity method. Investments in equity securities which do not have readily determinable fair values and for which the Company is not able to exercise significant influence over the investee are accounted for under the measurement alternative which is the cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar securities of the same investee. Use of Estimates U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Such estimates include, but are not limited to revenue recognition, allowances for doubtful accounts and sales returns, inventory valuation, useful lives of property, plant and equipment, product warranty accruals, stock-based compensation, impairment of investments and long-lived assets, and income taxes. The Company’s estimates are evaluated on an ongoing basis and changes in the estimates are recognized prospectively. Actual results could differ from those estimates. The Company considered estimates of the economic implications of the COVID-19 pandemic on its critical and significant accounting estimates, including an assessment of the collectability of each customer contract as part of the revenue recognition process, assessment of the valuation of accounts receivable, assessment of provision for excess and obsolete inventory and an impairment of long-lived assets. Fair Value of Financial Instruments The Company accounts for certain assets and liabilities at fair value, which is the price that would be received upon the sale of an asset or paid to transfer a liability in an orderly arms-length transaction between market participants. When measuring fair value, the Company takes into account the characteristics of the asset or liability that a market participant would consider when pricing the asset or liability at the measurement date. The Company considers one or more techniques for measuring fair value: market approach, income approach, and cost approach. The valuation techniques include inputs that are based on three different levels of observability to the market. The Company categorizes each of its fair value measurements in one of these three levels based on the lowest level input that is significant to the fair value measurement in its entirety. These levels are: • Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities; • Level 2 - Quoted prices in markets that are not active or financial instruments for which all significant inputs are observable, either directly or indirectly; and • Level 3 - Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable. Accounts receivable and accounts payable are carried at cost, which approximates fair value due to the short maturity of these instruments. Cash equivalents, certificates of deposit and the investment in an auction rate security are carried at fair value. Short-term and long-term debt is carried at amortized cost, which approximates its fair value based on borrowing rates currently available to the Company for loans with similar terms. Cash and Cash Equivalents The Company considers all highly liquid instruments with an original maturity of three months or less from the date of purchase to be cash equivalents. Cash equivalents consist primarily of money market funds and certificates of deposit with original maturities of less than three months. Restricted Cash and Cash Equivalents Restricted cash is comprised of amounts held in bank accounts which are controlled by the lenders pursuant to the terms of certain debt agreements, certificates of deposit primarily related to leases and customs requirements, and money market accounts held in escrow pursuant to the Company’s workers’ compensation program. These restricted cash balances have been excluded from the Company's cash and cash equivalents balance. Inventories Inventories are stated at lower of cost, using weighted average cost method, or net realizable value. Net realizable value is the estimated selling price of the Company's products in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. Inventories consist of purchased parts and raw materials (principally electronic components), work in process (principally products being assembled) and finished goods. The Company evaluates inventory on a quarterly basis for excess and obsolescence and lower of cost or net realizable value and, as necessary, writes down the valuation of inventories based upon the Company's inventory aging, forecasted usage and sales, anticipated selling price, product obsolescence and other factors. Once inventory is written down, its new value is maintained until it is sold or scrapped. The Company receives various rebate incentives from certain suppliers based on its contractual arrangements, including volume-based rebates. The rebates earned are recognized as a reduction of cost of inventories and reduce the cost of sales in the period when the related inventory is sold. Property, Plant and Equipment Property, plant and equipment is recorded at cost and depreciated using the straight-line method over the estimated useful lives of the related assets as follows: Software 3 to 5 years Machinery and equipment 3 to 7 years Furniture and fixtures 5 years Buildings 39 years Building improvements Up to 20 years Land improvements 15 years Leasehold improvements Shorter of lease term or estimated useful life Long-Lived Assets The Company evaluates its long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. When the sum of the undiscounted future net cash flows expected to result from the use of the asset and its eventual disposition is less than its carrying amount, an impairment loss would be measured based on the fair value of the asset compared to the carrying amount. No impairment charge for long-lived assets has been recorded in any of the periods presented. Revenue Recognition The Company generates revenues from the sale of server and storage systems, subsystems, accessories, services, server software management solutions, and support services. Product sales . The Company recognizes revenue from sales of products as control is transferred to customers, which generally happens at the point of shipment or upon delivery, unless customer acceptance is uncertain. Products sold by the Company are delivered via shipment from the Company’s facilities or drop shipment directly to its customers from a Company vendor. The Company may use distributors to sell products to end customers. Revenue from distributors is recognized when the distributor obtains control of the product, which generally happens at the point of shipment or upon delivery. The Company applies judgment in determining the transaction price as the Company may be required to estimate variable consideration when determining the amount of revenue to recognize. As part of determining the transaction price in contracts with customers, the Company estimates reserves for future sales returns based on a review of its history of actual returns for each major product line. Based upon historical experience, a refund liability is recorded at the time of sale for estimated product returns and an asset is recognized for the amount expected to be recorded in inventory upon product return, less the expected recovery costs. The Company also reduces revenue for the estimated costs of customer and distributor programs and incentive offerings such as price protection and rebates as well as the estimated costs of cooperative marketing arrangements where the fair value of the benefit derived from the costs cannot be reasonably estimated. Any provision for customer and distributor programs and other discounts is recorded as a reduction of revenue at the time of sale based on an evaluation of the contract terms and historical experience. Services sales. The Company’s sale of services mainly consists of extended warranty and on-site services. Revenue related to extended warranty commences upon the expiration of the standard warranty period and is recognized ratably over the contractual period as the Company stands ready to perform any required warranty service. Revenue related to on-site services commences upon recognition of the product sale and is recognized ratably over the contractual period as the on-site services are made available to the customer. These service contracts are typically one to five years in length. Service revenue has been less than 10% of net sales for all periods presented and is not separately disclosed. Contracts with multiple promised goods and services. Certain of the Company’s contracts contain multiple promised goods and services. The Company assesses whether each promised good or service is distinct for the purpose of identifying the performance obligations in the contract. This assessment involves subjective determinations and requires management to make judgments about the individual promised goods or services and whether such goods or services are separable from the other aspects of the contractual relationship. Performance obligations in a contract are identified based on the promised goods or services that will be transferred to the customer that are both capable of being distinct, whereby the customer can benefit from the service either on its own or together with other resources that are readily available from third parties or from the Company, and are distinct in the context of the contract, whereby the transfer of the services is separately identifiable from other promises in the contract. If these criteria are not met, the promised goods and services are accounted for as a combined performance obligation. Revenue allocated to each performance obligation is recognized at the time the related performance obligation is satisfied by transferring control of the promised good or service to a customer. If the contract contains a single performance obligation, the entire transaction price is allocated to the single performance obligation. Contracts that contain multiple performance obligations require an allocation of the transaction price to each performance obligation based on a relative standalone selling price basis. The Company determines standalone selling prices based on the price at which the performance obligation is sold separately. If the standalone selling price is not observable through past transactions, the Company applies judgment to estimate the standalone selling price taking into account available information, such as internally approved pricing guidelines with respect to geographies, customer type, internal costs, and gross margin objectives, for the related performance obligations. When the Company receives consideration from a customer prior to transferring goods or services to the customer, the Company records a contract liability (deferred revenue). The Company also recognizes deferred revenue when it has an unconditional right to consideration (i.e., a receivable) before transfer of control of goods or services to a customer. The Company considers shipping & handling activities as costs to fulfill the sales of products. Shipping revenue is included in net sales when control of the product is transferred to the customer, and the related shipping and handling costs are included in cost of sales. Taxes imposed by governmental authorities on the Company's revenue producing activities with customers, such as sales taxes and value added taxes, are excluded from net sales and included in operating expenses. Allowances for Doubtful Accounts Customers are subjected to a credit review process that evaluates each customer’s financial position and ability and intent to pay. On a quarterly basis, the Company makes estimates of its uncollectible accounts receivable by analyzing the aging of accounts receivable, history of bad debts, customer concentrations, customer-credit-worthiness, and current economic trends to evaluate the adequacy of the allowance for doubtful accounts. The Company's (recovery of) provision for bad debt was $(0.8) million, $(3.1) million, and $7.1 million in fiscal years 2021, 2020 and 2019, respectively. Cost of Sales Cost of sales primarily consists of the costs of materials, contract manufacturing, in-bound shipping, personnel and related expenses including stock-based compensation, equipment and facility expenses, warranty costs and provision for lower of cost or net realizable value and excess and obsolete inventory. Product Warranties The Company offers product warranties typically ranging from 15 to 39 months against any defective products. These standard warranties are assurance type warranties and the Company does not offer any services beyond the assurance that the product will continue working as specified. Therefore, these warranties are not considered separate performance obligations in the arrangement. Based on historical experience, the Company accrues for estimated returns of defective products at the time revenue is recognized. The Company monitors warranty obligations and may make revisions to its warranty reserve if actual costs of product repair and replacement are significantly higher or lower than estimated. Accruals for anticipated future warranty costs are recorded to cost of sales and included in accrued liabilities and other long-term liabilities. Warranty accruals are based on estimates that are updated on an ongoing basis taking into consideration inputs such as new product introductions, changes in the volume of claims compared with the Company's historical experience, and the changes in the cost of servicing warranty claims. The Company accounts for the effect of such changes in estimates prospectively. The following table presents for the fiscal years ended June 30, 2021, 2020 and 2019, the reconciliation of the changes in accrued warranty costs which is included as a component of accrued liabilities and other long-term liabilities (in thousands): Years Ended June 30, 2021 2020 2019 Balance, beginning of the year $ 12,379 $ 11,034 $ 9,884 Provision for warranty 29,638 35,962 22,991 Costs utilized (30,575) (34,502) (26,281) Change in estimated liability for pre-existing warranties 1,421 (115) 4,440 Balance, end of the year $ 12,863 $ 12,379 $ 11,034 Current portion 10,185 9,984 8,661 Non-current portion $ 2,678 $ 2,395 $ 2,373 Research and Development Research and development expenses consist of personnel expenses including salaries, benefits, stock-based compensation and incentive bonuses, and related expenses for the Company's research and development personnel, as well as materials and supplies, consulting services, third-party testing services and equipment and facility expenses related to the Company's research and development activities. All research and development costs are expensed as incurred. The Company occasionally receives funding from certain suppliers and customers towards its development efforts. Such amounts are recorded as a reduction of research and development expenses and were $10.9 million, $2.1 million, and $2.8 million for the fiscal years ended June 30, 2021, 2020 and 2019, respectively. During the fiscal year ended June 30, 2020, the Company also recorded a $9.5 million net settlement fee as a reduction in the research and development expenses related to the reimbursement of previously incurred expenses for one canceled joint product development agreement. Software development costs, including costs to develop software sold, leased, or otherwise marketed, that are incurred subsequent to the establishment of technological feasibility are capitalized if significant. Costs incurred during the application development stage for internal-use software are capitalized if significant. Capitalized software development costs are amortized using the straight-line amortization method over the estimated useful life of the applicable software. Such software development costs required to be capitalized have not been material to date. Advertising Costs Advertising costs, net of reimbursements received under the cooperative marketing arrangements with the Company's vendors, are expensed as incurred. Total advertising and promotional expenses were $4.1 million, $3.0 million and $2.4 million for the fiscal years ended June 30, 2021, 2020 and 2019, respectively. Stock-Based Compensation The Company measures and recognizes compensation expense for all share-based awards made to employees and non-employees, including stock options, restricted stock units ("RSUs") and performance-based restricted stock units (“PRSUs”). The Company recognizes the grant date fair value of all share-based awards over the requisite service period and accounts for forfeitures as they occur. Stock option and RSU awards are recognized to expense on a straight-line basis over the requisite service period. PRSU awards are recognized to expense using an accelerated method only when it is probable that a performance condition is met during the vesting period. If it is not probable, no expense is recognized and the previously recognized expense is reversed. The Company bases initial accrual of compensation expense on the estimated number of PRSUs that are expected to vest over the requisite service period. That estimate is revised if subsequent information indicates that the actual number of PRSUs is likely to differ from previous estimates. The cumulative effect on current and prior periods of a change in the estimated number of PRSUs expected to vest is recognized in stock-based compensation expense in the period of the change. Previously recognized compensation expense is not reversed if vested stock options, RSUs or PRSUs for which the requisite service has been rendered and the performance condition has been met expire unexercised or are not settled. The fair value of RSUs and PRSUs is based on the closing market price of the Company's common stock on the date of grant. The Company estimates the fair value of stock options granted using a Black-Scholes option pricing model. This model requires the Company to make estimates and assumptions with respect to the expected term of the option and the expected volatility of the price of the Company's common stock. The expected term represents the period that the Company’s stock-based awards are expected to be outstanding and was determined based on the Company's historical experience. The expected volatility is based on the historical volatility of the Company’s common stock. The fair value is then amortized on a straight-line basis over the requisite service periods of the awards, which is generally the vesting period. Leases The Company has arrangements for the right to use certain of its office, warehouse spaces and other premises, and equipment. The Company determines at inception if an arrangement is or contains a lease. When the terms of a lease effectively transfer control of the underlying asset to the Company, it is classified as a finance lease. All other leases are classified as operating leases. Operating Leases For operating leases with lease terms of more than 12 months, operating lease right-of-use ("ROU") assets are recorded in long-term other assets, and lease liabilities are recorded in accrued liabilities and other long-term liabilities on the consolidated balance sheet. The Company's lease term includes options to extend or terminate the lease when it is reasonably certain that it will exercise that option. The Company elected to apply the short-term lease recognition exemption and does not recognize ROU asset and lease liabilities for leases with an initial term of 12 months or less and recognizes as expense the payments under such leases on a straight-line basis over the lease term. The Company's leases with an initial term of 12 months or less are immaterial. Operating lease ROU assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments over the lease term. Operating lease ROU assets and liabilities are recognized at lease commencement based on the present value of the remaining lease payments discounted using the Company’s incremental borrowing rate as the interest rate implicit in the lease arrangements is not readily determinable. The incremental borrowing rate is estimated to be the interest rate on a fully collateralized basis with similar terms and payments and in the economic environment where the leased asset is located. Operating lease ROU assets also include initial direct costs incurred, prepaid lease payments, minus any lease incentives. Operating lease expense is recognized on a straight-line basis over the lease term. The Company accounts for fixed payments for lease and non-lease components as a single lease component which increases the amount of ROU assets and liabilities. Non-lease components that are variable costs, such as common area maintenance, are expensed as incurred and not included in the ROU assets and lease liabilities. Finance Leases Assets under finance leases are recorded in property, plant and equipment, net and lease liabilities are included in accrued liabilities and other long-term liabilities on the consolidated balance sheet. Finance lease interest expense is recognized based on an effective interest method and depreciation of assets is recorded on a straight-line basis over the shorter of the lease term and useful life of the asset. The Company's finance leases are immaterial. Income Taxes The Company accounts for income taxes under an asset and liability approach. Deferred income taxes reflect the impact of temporary differences between assets and liabilities recognized for financial reporting purposes and such amounts recognized for income tax reporting purposes, net of operating loss carry-forwards and other tax credits measured by applying enacted tax laws related to the financial statement periods. Valuation allowances are provided when necessary to reduce deferred tax assets to an amount that is more likely than not to be realized. The Company recognizes tax liabilities for uncertain income tax positions on the income tax return based on the two-step process. The first step is to determine whether it is more likely than not that each income tax position would be sustained upon audit. The second step is to estimate and measure the tax benefit as the amount that has a greater than 50% likelihood of being realized upon ultimate settlement with the tax authority. Estimating these amounts requires the Company to determine the probability of various possible outcomes. The Company evaluates these uncertain tax positions on a quarterly basis. This evaluation is based on the consideration of several factors, including changes in facts or circumstances, changes in applicable tax law, settlement of issues under audit and new exposures. If the Company later determines that its exposure is lower or that the liability is not sufficient to cover its revised expectations, the Company adjusts the liability and effects a related charge in its tax provision during the period in which the Company makes such a determination. Variable Interest Entities The Company determines at the inception of each arrangement whether an entity in which the Company holds an investment or in which the Company has other variable interests is considered a variable interest entity ("VIE"). The Company consolidates VIEs when it is the primary beneficiary. The primary beneficiary of a VIE is the party that meets both of the following criteria: (1) has the power to make decisions that most significantly affect the economic performance of the VIE and (2) has the obligation to absorb losses or the right to receive benefits that in either case could potentially be significant to the VIE. Periodically, the Company assesses whether any changes in the interest or relationship with the entity affect the determination of whether the entity is still a VIE and, if so, whether the Company is the primary beneficiary. If the Company is not the primary beneficiary in a VIE, the Company accounts for the investment or other variable interest in accordance with applicable GAAP. The Company has concluded that Ablecom Technology, Inc. (“Ablecom”) and its affiliate, Compuware Technology, Inc. ("Compuware"), are VIEs; however, the Company is not the primary beneficiary as it does not have the power to direct the activities that are most significant to the entities and therefore, the Company does not consolidate these entities. In performing its analysis, the Company considered its explicit arrangements with Ablecom and Compuware, all contractual arrangements with these entities. Also, as a result of the substantial related party relationships between the Company and these entities, the Company considered whether any implicit arrangements exist that would cause the Company to protect these related parties’ interests from suffering losses. The Company determined it has no material implicit arrangements with Ablecom, Compuware or their shareholders. The Company and Ablecom jointly established Super Micro Asia Science and Technology Park, Inc. (the "Management Company") in Taiwan to manage the common areas shared by the Company and Ablecom for its separately constructed manufacturing facilities. In fiscal year 2012, each party contributed $0.2 million for a 50% ownership interest of the Management Company. The Company has concluded that the Management Company is a VIE, and the Company is the primary beneficiary as it has the power to direct the activities that are most significant to the Management Company. For the fiscal years ended 2021, 2020 and 2019, the accounts of the Management Company were consolidated with the accounts of Super Micro Computer, and a noncontrolling interest was recorded for Ablecom's interest in the net assets and operations of the Management Company. Net income (loss) attributable to Ablecom's interest was not material for the periods presented and was included in general and administrative expenses in the Company's consolidated statements of operations. Foreign Currency Transactions The functional currency of the Company’s international subsidiaries is the U.S. dollar, with the exception of Super Micro Asia and Technology Park, Inc., a consolidated variable interest entity. Monetary assets and liabilities of the Company's international subsidiaries that are denominated in foreign currency are remeasured into U.S. dollars at period-end exchange rates. Non-monetary assets and liabilities that are denominated in the foreign currency are remeasured into U.S. dollars at the historical rates. Revenue and expenses that are denominated in the foreign currency are remeasured into U.S. dollars at the average exchange rates during the period. Remeasurement of foreign currency accounts and resulting foreign exchange transaction gains and losses, which have not been material, are reflected in the consolidated statements of operations in other expense, net. The functional currency of Super Micro Asia and Technology Park, Inc. is New Taiwanese Dollar (“NTD”). Assets and liabilities are translated to U.S. dollars at the period-end exchange rate. Revenues and expenses are translated using the average exchange rate for the period. The effects of foreign currency translation are included in stockholders’ equity as a component of accumulated other comprehensive (loss) income in the accompanying consolidated balance sheets and periodic movements are summarized as a line item in the consolidated statements of comprehensive income. The Company has an investment in a privately-held company that is accounted for under the equity method (the "Corporate Venture"). The functional currency of the Corporate Venture is the Chinese Yuan. Adjustments for the Company's share of the effects of foreign currency translation from local currency to U.S. dollars are recorded as increases or decreases to the carrying value of the investment and included in stockholders’ equity as a component of accumulated other comprehensive (loss) income in the accompanying consolidated balance sheets and periodic movements are summarized as a line item in the consolidated statements of comprehensive income. Net Income Per Common Share Basic net income per common share is computed by dividing net income by the weighted-average number of shares of common stock outstanding during the period. Diluted net income per common share is computed by dividing net income by the weighted-average number of shares of common stock outstanding during the period increased to include the number of additional shares of common stock that would have been outstanding if the potentially dilutive securities had been issued. Potentially dilutive securities include outstanding stock options and unvested RSUs and PRSUs. Contingently issuable shares are included in computing basic net income per common share as of the date that all necessary conditions, including service vesting conditions have been satisfied. Contingently issuable shares are considered for computing diluted net income per common share as of the beginning of the period in which all necessary conditions have been satisfied and the only remaining vesting condition is a service vesting condition. Under the treasury stock method, an increase in the fair market value of the Company's common stock results in a greater dilutive effect from outstanding stock options and RSUs and PRSUs. Additionally, the exercise of stock options and the vesting of RSUs results in a further dilutive effect on net income per share. The computation of basic and diluted net income per common share is as follows (in thousands, except per share amounts): Years Ended June 30, 2021 2020 2019 Numerator: Net income $ 111,865 $ 84,308 $ 71,918 Denominator: Weighted-average shares outstanding 51,157 50,987 49,917 Effect of dilutive securities 2,350 1,851 1,799 Weighted-average diluted shares 53,507 52,838 51,716 Basic net income per common share $ 2.19 $ 1.65 $ 1.44 Diluted net income per common share $ 2.09 $ 1.60 $ 1.39 For the fiscal years ended June 30, 2021, 2020 and 2019, the Company had stock options, RSUs and PRSUs outstanding that could potentially dilute basic earnings per share in the future, but were excluded from the computation of diluted net income per share in the periods presented, as their effect would have been anti-dilutive. The anti-dilutive common share equivalents resulting from outstanding equity awards were 670,179, 2,208,000, and 3,758,000 for the fiscal years ended June 30, 2021, 2020 and 2019, respectively. Concentration of Supplier Risk Certain materials used by the Company in the manufacturing of its products are av

Fair Value Disclosure

Fair Value Disclosure	12 Months Ended
	Jun. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value Disclosure	Fair Value DisclosureThe financial instruments of the Company measured at fair value on a recurring basis are included in cash equivalents, other assets and accrued liabilities. The Company classifies its financial instruments, except for its investment in an auction rate security, within Level 1 or Level 2 in the fair value hierarchy because the Company uses quoted prices in active markets or alternative pricing sources and models using market observable inputs to determine their fair value. The Company’s investment in an auction rate security is classified within Level 3 of the fair value hierarchy as the determination of its fair value was not based on observable inputs as of June 30, 2021 and June 30, 2020. See Note 1, "Organization and Summary of Significant Accounting Policies," for a discussion of the Company’s policies regarding the fair value hierarchy. The Company is using the discounted cash flow method to estimate the fair value of the auction rate security at each period end and the following assumptions: (i) the expected yield based on observable market rate of similar securities, (ii) the security coupon rate that is reset monthly, (iii) the estimated holding period and (iv) a liquidity discount. The liquidity discount assumption is based on the management estimate of lack of marketability discount of similar securities and is determined based on the analysis of financial market trends over time, recent redemptions of securities and other market activities. The Company performed a sensitivity analysis and applying a change of either plus or minus 100 basis points in the liquidity discount does not result in a significantly higher or lower fair value measurement of the auction rate security as of June 30, 2021. Financial Assets and Liabilities Measured on a Recurring Basis The following table sets forth the Company’s financial instruments as of June 30, 2021 and 2020, which are measured at fair value on a recurring basis by level within the fair value hierarchy. These are classified based on the lowest level of input that is significant to the fair value measurement (in thousands): June 30, 2021 Level 1 Level 2 Level 3 Asset at Assets Money market funds (1) $ 151 $ — $ — $ 151 Certificates of deposit (2) — 863 — 863 Auction rate security — — 1,556 1,556 Total assets measured at fair value $ 151 $ 863 $ 1,556 $ 2,570 June 30, 2020 Level 1 Level 2 Level 3 Asset at Assets Money market funds (1) $ 1,163 $ — $ — $ 1,163 Certificates of deposit (2) — 836 — 836 Auction rate security — — 1,571 1,571 Total assets measured at fair value $ 1,163 $ 836 $ 1,571 $ 3,570 Liabilities Performance awards liability (3) $ — $ 2,100 $ — $ 2,100 Total liabilities measured at fair value $ — $ 2,100 $ — $ 2,100 __________________________ (1) $0.0 million and $0.4 million in money market funds are included in cash and cash equivalents and $0.2 million and $0.8 million in money market funds are included in restricted cash, non-current in other assets in the consolidated balance sheets as of June 30, 2021 and 2020, respectively. (2) $0.2 million and $0.2 million in certificates of deposit are included in cash and cash equivalents, $0.3 million and $0.3 million in certificates of deposit are included in prepaid expenses and other assets, and $0.4 million and $0.3 million in certificates of deposit are included in restricted cash, non-current in other assets in the consolidated balance sheets as of June 30, 2021 and 2020, respectively. (3) As of June 30, 2021, the Company no longer measures performance awards liability at fair value because the Company trued up the performance awards liability to the cash payment value. As of June 30, 2020, the current portion of the performance awards liability of $1.5 million is included in accrued liabilities and the noncurrent portion of $0.6 million is included in other long-term liabilities in the consolidated balance sheets. On a quarterly basis, the Company also evaluates the current expected credit loss by considering factors such as historical experience, market data, issuer-specific factors, and current economic conditions. For the fiscal year ended June 30, 2021, the credit losses related to the Company’s investments was not significant. As of June 30, 2020, the Company estimated the fair value of performance awards using the Monte-Carlo simulation model and classified them within Level 2 of the fair value hierarchy as estimates are based on the observable inputs. The significant inputs used in estimating the fair value of the awards as of June 30, 2020 are as follows: Stock Price as of Period End Performance Period Risk-free Rate Volatility Dividend Yield $28.39 1.25 - 2.00 years 0.16% 53.75% — There was no movement in the balances of the Company's financial assets measured at fair value on a recurring basis, consisting of investment in an auction rate security, using significant unobservable inputs (Level 3) for fiscal years 2021 and 2020. There were no transfers between Level 1, Level 2 or Level 3 financial instruments in fiscal years 2021 and 2020. The following is a summary of the Company’s investment in an auction rate security as of June 30, 2021 and 2020 (in thousands): June 30, 2021 Cost Basis Gross Gross Fair Value Auction rate security $ 1,750 $ — $ (194) $ 1,556 June 30, 2020 Cost Basis Gross Gross Fair Value Auction rate security $ 1,750 $ — $ (179) $ 1,571 For the fiscal year ended June 30, 2021, the Company's loss recognized in other comprehensive income for the auction rate security was immaterial. No gain or loss was recognized in other comprehensive income for the auction rate security for the fiscal years ended June 30, 2020 and 2019. The Company measures the fair value of outstanding debt for disclosure purposes on a recurring basis. As of June 30, 2021 and 2020, total debt of $98.2 million and $29.4 million, respectively, is reported at amortized cost. This outstanding debt is classified as Level 2 as it is not actively traded. The amortized cost of the outstanding debt approximates the fair value. Other Financial Assets - Investments into Non-Marketable Equity Securities The Company's non-marketable equity securities are investments in privately held companies without readily determinable fair values in the amount of $0.1 million as of June 30, 2021 and 2020, respectively. The Company accounts for these investments at cost minus impairment, if any, plus or minus changes from observable price changes in orderly transactions for the identical or similar investments by the same issuer. During the years ended June 30, 2021 and 2020, the Company did not record any upward or downward adjustments to the carrying values of the non-marketable equity securities related to observable price changes. The Company also did not record any impairment to the carrying values of the non-marketable equity securities during fiscal year 2021 and 2020. During fiscal year 2019, the Company recorded impairment charges of $2.7 million for its non-marketable equity securities which had an initial cost basis of $2.7 million as it was determined the carrying value of the investments were not recoverable.

Revenue

Revenue	12 Months Ended
	Jun. 30, 2021
Revenue from Contract with Customer [Abstract]
Revenue	Revenue Disaggregation of Revenue The Company disaggregates revenue by type of product and geographical market in order to depict the nature, amount, and timing of revenue and cash flows. Service revenues, which are less than 10%, are not a significant component of total revenue and are aggregated within the respective categories. The following is a summary of net sales by product type (in thousands): Years Ended June 30, 2021 2020 2019 Server and storage systems $ 2,790,305 $ 2,620,754 $ 2,858,644 Subsystems and accessories 767,117 718,527 641,716 Total $ 3,557,422 $ 3,339,281 $ 3,500,360 Server and storage systems constitute an assembly and integration of subsystems and accessories, and related services. Subsystems and accessories are comprised of serverboards, chassis and accessories. International net sales are based on the country and geographical region to which the products were shipped. The following is a summary of net sales by geographic region (in thousands): Years Ended June 30, 2021 2020 2019 United States $ 2,107,910 $ 1,957,329 $ 2,032,948 Asia 699,653 650,652 712,211 Europe 614,826 598,558 611,014 Other 135,033 132,742 144,187 Total $ 3,557,422 $ 3,339,281 $ 3,500,360 Starting July 1, 2020, the Company does not separately disclose revenue by products sold to indirect sales channel partners or direct customers and original equipment manufacturers because management does not make business operational decisions based on this set of disaggregation so the disclosure is no longer material to investors. Contract Balances Generally, the payment terms of the Company’s offerings range from 30 to 60 days. In certain instances, customers may prepay for products and services in advance of delivery. Receivables relate to the Company’s unconditional right to consideration for performance obligations either partially or fully completed. Contract assets are rights to consideration in exchange for goods or services that the Company has transferred to a customer when such right is conditional on something other than the passage of time. Such contract assets are insignificant to the Company’s consolidated financial statements. Contract liabilities consist of deferred revenue and relate to amounts invoiced to or advance consideration received from customers, which precede the Company’s satisfaction of the associated performance obligation(s). The Company’s deferred revenue primarily results from customer payments received upfront for extended warranties and on-site services because these performance obligations are satisfied over time. Revenue recognized during fiscal year ended June 30, 2021, which was included in the opening deferred revenue balance as of June 30, 2020 of $203.8 million, was $101.6 million. Deferred revenue decreased $1.5 million during the fiscal year ended June 30, 2021 as compared to the fiscal year ended June 30, 2020 mainly due to the recognition of revenue from contracts entered into in prior periods exceeding the value of the transaction price allocated for service contract performance obligations during the fiscal year ended June 30, 2021. Transaction Price Allocated to the Remaining Performance Obligations Remaining performance obligations represent the aggregate the amount of transaction price that is allocated to performance obligations not delivered, or only partially undelivered, as of the end of the reporting period. The Company applies the exemption to not disclose information about remaining performance obligations that are part of a contract that has an original expected duration of one year or less. These performance obligations generally consist of services, such as on-site services, including integration services and extended warranty services. that are contracted for one year or less, and products for which control has not yet been transferred. The value of the transaction price allocated to remaining performance obligations as of June 30, 2021 was approximately $202.3 million. The Company expects to recognize approximately 50% of remaining performance obligations as revenue in the next 12 months, and the remainder thereafter. Capitalized Contract Acquisition Costs and Fulfillment Cost Contract acquisition costs are those incremental costs that the Company incurs to obtain a contract with a customer that it would not have incurred if the contract had not been obtained. Contract acquisition costs consist primarily of incentive bonuses. Contract acquisition costs are considered incremental and recoverable costs of obtaining and fulfilling a contract with a customer and are therefore capitalizable. The Company applies the practical expedient to expense incentive bonus costs as incurred if the amortization period would be one year or less, generally upon delivery of the associated server and storage systems or components. Where the amortization period of the contract cost would be more than a year, the Company applies judgment in the allocation of the incentive bonus cost asset between hardware and service performance obligations and expenses the cost allocated to the hardware performance obligations upon delivery of associated server and storage systems or components and amortizes the cost allocated to service performance obligations over the period the services are expected to be provided. Contract acquisition costs allocated to service performance obligations that are subject to capitalization are insignificant to the Company’s consolidated financial statements. Contract fulfillment costs consist of costs paid in advance for outsourced services provided by third parties to the extent they are not in the scope of other guidance. Fulfillment costs paid in advance for outsourced services provided by third parties are capitalized and amortized over the period the services are expected to be provided. Such fulfillment costs are insignificant to the Company’s consolidated financial statements.

Accounts Receivable Allowances

Accounts Receivable Allowances	12 Months Ended
	Jun. 30, 2021
Receivables [Abstract]
Accounts Receivable Allowances	Accounts Receivable Allowances The Company has established an allowance for doubtful accounts. The allowance for doubtful accounts is based upon the age of outstanding receivables, credit risk of specific customers, historical trends related to past losses and other relevant factors. Accounts receivable allowances as of June 30, 2021, 2020 and 2019 consisted of the following (in thousands): Beginning Charged to Write-offs Ending Allowance for doubtful accounts: Year ended June 30, 2021 $ 4,586 $ (820) $ (1,175) $ 2,591 Year ended June 30, 2020 8,906 (3,081) (1,239) 4,586 Year ended June 30, 2019 1,945 7,058 (97) 8,906

Inventories

Inventories	12 Months Ended
	Jun. 30, 2021
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories as of June 30, 2021 and 2020 consisted of the following (in thousands): June 30, 2021 2020 Finished goods $ 761,694 $ 656,817 Work in process 80,472 38,146 Purchased parts and raw materials 198,798 156,535 Total inventories $ 1,040,964 $ 851,498

Property, Plant and Equipment

Property, Plant and Equipment	12 Months Ended
	Jun. 30, 2021
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property, Plant, and Equipment Property, plant and equipment as of June 30, 2021 and 2020 consisted of the following (in thousands): June 30, 2021 2020 Buildings $ 86,930 $ 86,930 Land 76,421 75,251 Machinery and equipment 97,671 85,381 Buildings construction in progress (1) 87,438 46,311 Building and leasehold improvements 26,640 24,517 Software 22,592 20,597 Furniture and fixtures 22,843 21,544 420,535 360,531 Accumulated depreciation and amortization (145,822) (126,746) Property, plant and equipment, net $ 274,713 $ 233,785 __________________________ (1) Primarily relates to the development and construction costs associated with the Company’s Green Computing Park located in San Jose, California and a new building in Taiwan.

Prepaid Expenses and Other Asse

Prepaid Expenses and Other Assets	12 Months Ended
	Jun. 30, 2021
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid Expenses and Other Assets	Prepaid Expenses and Other Assets Prepaid expenses and other current assets as of June 30, 2021 and 2020 consisted of the following (in thousands): June 30, 2021 2020 Other receivables (1) $ 99,921 $ 96,669 Prepaid income tax 12,288 14,323 Prepaid expenses 6,719 7,075 Deferred service costs 4,900 4,161 Restricted cash 251 250 Others 6,116 4,507 Total prepaid expenses and other current assets $ 130,195 $ 126,985 __________________________ (1) Includes other receivables from contract manufacturers based on certain buy-sell arrangements of $76.2 million and $83.8 million as of June 30, 2021 and 2020, respectively. Other assets as of June 30, 2021 and 2020 consisted of the following (in thousands): June 30, 2021 2020 Operating lease right-of-use asset $ 20,047 $ 23,784 Deferred service costs, non-current 5,421 4,632 Deposits 1,669 1,201 Prepaid expense, non-current 1,973 1,576 Investment in auction rate security 1,556 1,571 Restricted cash, non-current 932 1,607 Others 528 128 Total other assets $ 32,126 $ 34,499 Cash, cash equivalents and restricted cash as of June 30, 2021 and 2020 consisted of the following (in thousands): June 30, 2021 2020 Cash and cash equivalents $ 232,266 $ 210,533 Restricted cash included in prepaid expenses and other current assets 251 250 Restricted cash included in other assets 932 1,607 Total cash, cash equivalents and restricted cash $ 233,449 $ 212,390

Investment in a Corporate Ventu

Investment in a Corporate Venture	12 Months Ended
	Jun. 30, 2021
Equity Method Investments and Joint Ventures [Abstract]
Investment in a Corporate Venture	Investment in a Corporate Venture In October 2016, the Company entered into agreements pursuant to which the Company contributed certain technology rights in connection with an investment in the Corporate Venture to expand the Company's presence in China. The Corporate Venture is 30% owned by the Company and 70% owned by another company in China. The transaction was closed in the third fiscal quarter of 2017 and the investment has been accounted for using the equity method. As such, the Corporate Venture is also a related party. The Company recorded a deferred gain related to the contribution of certain technology rights. As of June 30, 2021 and 2020, the Company had unamortized deferred gain balance of $1.0 million and $2.0 million, respectively, in accrued liabilities and $0.0 million and $1.0 million, respectively, in other long-term liabilities in the Company’s consolidated balance sheets. The Company monitors the investment for events or circumstances indicative of potential impairment and makes appropriate reductions in carrying values if it determines that an impairment charge is required. In June 2020, the third-party parent company that controls the Corporate Venture was placed on a U.S. government export control list, along with several of such third-party parent's related entities and a separate listing for one of its subsidiaries. The Corporate Venture is not itself a restricted party. The Company has concluded that the Corporate Venture is in compliance with the new restrictions. The Company does not believe that the equity investment carrying value is impacted as of June 30, 2021. No impairment charge was recorded for the fiscal years ended June 30, 2021 and 2020. The Company sold products worth $51.2 million, $61.9 million, $52.2 million to the Corporate Venture in the fiscal years 2021, 2020, 2019, respectively, and the Company's share of intra-entity profits on the products that remained unsold by the Corporate Venture as of June 30, 2021 and June 30, 2020 have been eliminated and have reduced the carrying value of the Company's investment in the Corporate Venture. To the extent that the elimination of intra-entity profits reduces the investment balance below zero, such amounts are recorded within accrued liabilities. The Company had $8.5 million and $7.8 million due from the Corporate Venture in accounts receivable, net as of June 30, 2021 and 2020, respectively.

Accrued Liabilities

Accrued Liabilities	12 Months Ended
	Jun. 30, 2021
Payables and Accruals [Abstract]
Accrued Liabilities	Accrued Liabilities Accrued liabilities as of June 30, 2021 and 2020 consisted of the following (in thousands): June 30, 2021 2020 Accrued payroll and related expenses $ 45,770 $ 33,577 Contract manufacturers liabilities 45,319 36,249 Customer deposits 32,419 9,942 Accrued warranty costs 10,185 9,984 Operating lease liability 6,322 6,310 Accrued cooperative marketing expenses 5,652 5,925 Accrued professional fees 2,737 5,661 Accrued legal liabilities — 18,114 Others 30,446 29,639 Total accrued liabilities $ 178,850 $ 155,401 Performance Awards Liability In March 2020, the Board of Directors (the “Board”) approved performance bonuses for the Chief Executive Officer, a senior executive and two members of the Board, which payments will be earned when specified market and performance conditions are achieved. The Chief Executive Officer’s aggregate cash bonuses of up to $8.1 million are earned in two tranches. The first 50% is payable if the average closing price for the Company’s common stock equals or exceeds $31.61 for any period of 20 consecutive trading days following the date of the agreement and ending prior to September 30, 2021 and the Chief Executive Officer remains employed with the Company through the date that such common stock price goal is determined to have been achieved. This payment can be reduced at the discretion of the Board to the extent the Company has not made adequate progress in remediating its material weaknesses in its internal control over financial reporting as determined by the Board. The second 50% is payable if the average closing price for the Company’s common stock equals or exceeds $32.99 for any period of 20 consecutive trading days following the date of the agreement and ending prior to June 30, 2022 and the Chief Executive Officer remains employed with the Company through the date that such common stock price goal is achieved. During the fiscal year ended June 30, 2021, the target average closing prices for both tranches were met but no determination has been made if there has been adequate progress in remediating the Company’s internal weaknesses in its internal control over financial reporting. The cash payment under the second tranche has been made as of June 30, 2021, but no cash payment had been made for the first tranche as the Board has to approve this payment. Performance bonuses for a senior executive and two members of the Board are earned based on achieving a specified target average closing price for the Company’s common stock over the specified period as determined by the Board at the grant dates and continuous services through the payment dates. A senior executive earned an aggregate cash payment of $0.1 million when the target average closing price was met in the fourth quarter of fiscal year 2020. The two members of the Board can earn aggregate cash payments of $0.3 million in two tranches if the target average closing price reaches $31.61 for the first tranche and $32.99 per share for the second tranche. During the fiscal year ended June 30, 2021, the target average closing prices for both tranches were met and the cash payment for both tranches was made to the two Board members. The Company accounts for the outstanding performance bonuses as liabilities and estimates fair value of payable amounts using a Monte-Carlo simulation model. The awards are re-measured at each period end with changes in fair value recorded in the Company’s consolidated statement of operations in operating expenses. The cumulative recorded expense at each period end is trued-up to the expected payable amount vested through the period end. The requisite service periods over which expenses are recognized are derived from the Monte-Carlo model for all performance awards, except for the first 50% of the Chief Executive Officer’s award that includes a performance condition. The Company estimates if it is probable that the performance condition will be met prior to the expiration date of this award. If at the measurement date it is determined to be probable, the Company estimates the requisite period as the longer of the service period derived by the Monte-Carlo model and the implicit service period when the Company expects to make adequate progress in remediating its material weaknesses in its internal control over financial reporting, as reported by the Company's Audit Committee. If it is determined to not be probable, then the Company will reverse any previously recognized expense for this award in the period when it is no longer probable that the performance condition will be achieved. With the satisfaction of the target average closing price conditions in the fiscal year ended June 30, 2021, the Company trued up all the unpaid performance bonuses to the cash payment value. As of June 30, 2021, the full cash value of the bonuses were paid, except the Chief Executive Officer's first tranche performance bonus which was recorded as an accrued liability on the Company's consolidated balance sheet. The Company has completed the remediation of its material weaknesses in its internal control over financial reporting, and anticipates that the Board will conclude that there has been adequate progress in remediating the Company's material weaknesses in its internal control over financial reporting by October 31, 2021. Therefore, as of June 30, 2021, the Company trued up the accrued liability for the Chief Executive Officer’s first tranche award to the expected payable amount vested through the period end and the unrecognized cash value will be recorded over the remaining service period. Based on the cash payment value and estimated fair value of these performance bonuses as of June 30, 2021 and June 30, 2020, the Company recorded a $3.6 million and $2.1 million liability, respectively, of which $3.6 million and $1.5 million, respectively, was recorded within accrued liabilities and $0.0 million and $0.6 million, respectively, was recorded within other long-term liabilities on the Company's consolidated balance sheet. An unrecognized compensation expense of $0.5 million will be recorded over the remaining service periods of 0.18 years. The expense recognized during fiscal years 2021 and 2020 was $5.8 million and $2.1 million, respectively.

Short-term and Long-term Debt

Short-term and Long-term Debt	12 Months Ended
	Jun. 30, 2021
Debt Disclosure [Abstract]
Short-term and Long-term Debt	Short-term and Long-term Debt Short-term and long-term debt obligations as of June 30, 2021 and 2020 consisted of the following (in thousands): June 30, 2021 2020 Line of credit: CTBC Bank $ 18,000 $ — E.SUN Bank 20,400 — Total line of credit 38,400 — Term loans: CTBC Bank, due August 31, 2021 25,090 23,704 CTBC Bank, due June 4, 2030 34,700 5,697 Total term loans 59,790 29,401 Total debt 98,190 29,401 Short-term debt and current portion of long-term debt 63,490 23,704 Debt, Non-current $ 34,700 $ 5,697 Activities under Revolving Lines of Credit and Term Loans Bank of America 2018 Bank of America Credit Facility In April 2018, the Company entered into a revolving line of credit with Bank of America for up to $250.0 million (as amended from time to time, the "2018 Bank of America Credit Facility"). On June 28, 2021, the 2018 Bank of America Credit Facility was amended to, among other items, extend the maturity to June 28, 2026, reduce the size of the facility from $250.0 million to $200.0 million, increase the maximum amount that the Company can request the facility be increased (the accordion feature) from $100.0 million to $150.0 million, and update provisions relating to erroneous payments and LIBOR replacement mechanics. In addition, the amendment reduced both the unused line fee from 0.375% per annum to 0.2% or 0.3% per annum (depending upon amount drawn under the facility) and the interest rate applicable to the facility from LIBOR plus 2.00% or 3.00% per annum (depending upon amount drawn under the facility) to LIBOR plus 1.375% or 1.625% per annum. The amendment was accounted for as a modification and the impact was immaterial to the consolidated financial statements. Interest accrued on any loans under the 2018 Bank of America Credit Facility is due on the first day of each month, and the loans are due and payable in full on the termination date of the 2018 Bank of America Credit Facility. Voluntary prepayments are permitted without early repayment fees or penalties. Subject to customary exceptions, the 2018 Bank of America Credit Facility is secured by substantially all of Super Micro Computer’s assets, other than real property assets. Under the terms of the 2018 Bank of America Credit Facility, the Company is not permitted to pay any dividends. The 2018 Bank of America Credit Facility contains customary representations and warranties and customary affirmative and negative covenants applicable to the Company and its subsidiaries and contains a financial covenant, which requires that the Company maintain a certain fixed charge coverage ratio, for each twelve-month period while in a Trigger Period, as defined in the agreement, is in effect. As of June 30, 2021 and 2020, the Company had no outstanding borrowings under the 2018 Bank of America Credit Facility. The interest rates under the 2018 Bank of America Credit Facility as of June 30, 2021 and 2020 were 1.50% and 3.00%, respectively. In October 2018, a $3.2 million letter of credit was issued under the 2018 Bank of America Credit Facility and in October 2019, the letter of credit amount was increased to $6.4 million. No amount was drawn under the standby letter of credit. In May 2021, the letter of credit was cancelled. The balance of debt issuance costs outstanding were $0.5 million and $0.6 million as of June 30, 2021 and 2020, respectively. The Company has been in compliance with all the covenants under the 2018 Bank of America Credit Facility, and as of June 30, 2021, the Company's available borrowing capacity was $200.0 million , subject to the borrowing base limitation and compliance with other applicable terms. CTBC Bank CTBC Credit Facility In June 2019, the Company entered into a credit agreement with CTBC Bank, which was amended in August 2020, (collectively, the "CTBC Credit Facility"). The amended credit agreement with CTBC Bank that provides for (i) a 12-month NTD 700.0 million ($24.0 million U.S. dollar equivalent) term loan facility secured by the land and building located in Bade, Taiwan with an interest rate equal to the lender's established NTD interest rate plus 0.25% per annum which is adjusted monthly, which term loan facility also includes a 12-month guarantee of up to NTD 100.0 million ($3.4 million U.S. dollar equivalent) with an annual fee equal to 0.50% per annum, (ii) a 180-day NTD 1,500.0 million ($51.5 million U.S. dollar equivalent) term loan facility up to 100% of eligible accounts receivable in an aggregate amount with an interest rate equal to the lender's established NTD interest rate plus an interest rate ranging from 0.30% to 0.50% per annum which is adjusted monthly, and (ⅲ) a 12-month revolving line of credit of up to 100% of eligible accounts receivable in an aggregate amount of up to $50.0 million with an interest rate equal to the lender's established USD interest rate plus 0.80% per annum which is adjusted monthly, or equal to the lender’s established NTD interest rate plus an interest rate ranging from 0.30% to 0.50% per annum which is adjusted monthly if the borrowing is in NTD. In February 2021, CTBC Bank amended the USD interest rate to be the lender's established USD interest rate plus 0.70% to 0.75% per annum which is adjusted monthly. The total borrowings allowed under the CTBC Credit Facility was capped at $50.0 million. There are no financial covenants associated with the CTBC Credit Facility. The total outstanding borrowings under the CTBC Credit Facility term loan were denominated in NTD and remeasured into U.S. dollars of $25.1 million and $23.7 million at June 30, 2021 and 2020, respectively. The interest rate for these loans were 0.75% per annum as of June 30, 2021 and 0.63% per annum as of June 30, 2020. As of June 30, 2021 and 2020, the outstanding borrowings under the CTBC Credit Facility revolving line of credit were $18.0 million and $0.0 million, respectively. The interest rate was 0.98% per annum as of June 30, 2021. As of June 30, 2021, the amount available for future borrowing under the CTBC Credit Facility was $6.9 million. As of June 30, 2021, the net book value of land and building located in Bade, Taiwan, collateralizing the CTBC Credit Facility term loan was $24.8 million. 2020 CTBC Term Loan Facility due June 4, 2030 In May 2020, the Company entered into a ten-year, non-revolving term loan facility (“2020 CTBC Term Loan Facility”) to obtain up to NTD 1.2 billion ($40.7 million in U.S. dollar equivalents) in financing for use in the expansion and renovation of the Company’s Bade Manufacturing Facility located in Taiwan. Drawdowns on the 2020 CTBC Term Loan Facility are based on 80% of balances owed on commercial invoices from the contractor and shall be drawn according to the progress of the renovations. Borrowings under the 2020 CTBC Term Loan Facility are available through June 2022. The Company is required to pay against total outstanding principal and interest in equal monthly installments starting June 2023 and continuing through the maturity date of June 2030. Interest under the 2020 CTBC Term Loan Facility is the two-year term floating rate of postal saving interest rate plus 0.105% and is established on the date of the drawdown application . If no interest rate is agreed upon, interest shall accrue at the annual base rate for CTBC plus 4.00%. The 2020 CTBC Term Loan Facility is secured by the Bade Manufacturing Facility and its expansion. Fees paid to the lender as debt issuance costs were immaterial. The Company has financial covenants requiring the Company's current ratio, debt service coverage ratio, and financial debt ratio, as defined in the agreement, to be maintained at certain levels under the 2020 CTBC Term Loan Facility. As of June 30, 2021 and 2020, the amounts outstanding under the 2020 CTBC Term Loan Facility were $34.7 million and $5.7 million, respectively. The interest rates for these loans were 0.45% per annum as of June 30, 2021 and June 30, 2020. The net book value of the property serving as collateral as of June 30, 2021 was $45.9 million. As of June 30, 2021, the Company was in compliance with all financial covenants under the 2020 CTBC Term Loan Facility. 2021 CTBC Credit Lines On July 20, 2021 (the “Effective Date”), the Company entered into a general agreement for omnibus credit lines with CTBC Bank, which replaced the CTBC Credit Facility and 2020 CTBC Term Loan Facility (the “Prior CTBC Credit Lines”) in their entirety and permit borrowings, from time to time, of (i) a term loan facility of up to NTD 1,550.0 million ($55.4 million in U.S. dollar equivalents) and (ii) a line of credit facility of up to US$105.0 million (the “2021 CTBC Credit Lines”). Interest rates are to be established according to individual credit arrangements established pursuant to the 2021 CTBC Credit Lines, which interest rates shall be subject to adjustment depending on the satisfaction of certain conditions. Term loans made pursuant to the 2021 CTBC Credit Lines are secured by certain of the Company’s assets, including certain property, land, plant, and equipment. As of June 30, 2021, the net book value of land and building located in Bade, Taiwan, collateralizing the New CTBC Credit Facility term loan was $70.7 million. The Company is subject to various financial covenants under the 2021 CTBC Credit Lines, including current ratio, debt service coverage ratio, and financial debt ratio requirements. Amounts outstanding under the Prior CTBC Credit Lines on the Effective Date were assumed by the 2021 CTBC Credit Lines. E.SUN Bank Credit Facility In December 2020, Super Micro Computer Inc, Taiwan, a wholly-owned Taiwan subsidiary of the Company, entered into a General Credit Agreement (the “E.SUN Credit Facility”) with E.SUN Bank in Taiwan. The E.SUN Credit Facility provides for the issuance of loans, advances, acceptances, bills, bank guarantees, overdrafts, letters of credit, and other types of drawdown instruments up to a credit limit of $30.0 million. The E.SUN Credit Facility expires on September 18, 2021. Generally, the interest for base rate loans made under the E.SUN Credit Facility is based upon an average interbank overnight call loan rate in the finance industry (such as LIBOR or TAIFX) plus a fixed margin, and is subject to occasional adjustment. Interest for adjustable loan rate loans made under the E.SUN Credit Facility is based upon an average one-year fixed rate time saving deposit rate of a selected reference bank which shall be a well-known domestic bank in Taiwan, and is subject to occasional adjustment. The E.SUN Credit Facility has customary default provisions permitting E.SUN Bank to terminate or reduce the credit limit, shorten the credit period, or deem all liabilities due and payable, including in the event such Taiwan subsidiary of the Company has an overdue liability at another financial organization. There are no financial covenants associated with the E.SUN Credit Facility. Terms for specific drawdown instruments issued under the E.SUN Credit Facility, such as credit amount, term of use, mode of drawdown, specific lending rate, and other relevant terms, are to be set forth in Notifications and Confirmation of Credit Conditions by and between the Company and E.SUN Bank. A Notification and Confirmation of Credit Conditions agreement under the E.SUN Credit Facility was entered into on December 2, 2020 for a $30.0 million import loan (the “Import Loan”) with a tenor of 120 days. In June 2021, the Import Loan was amended to, among other items, bearing interest at a rate based on the higher of LIBOR plus 1.00% then divided by 0.946 or TAIFX plus 0.80% then divided by 0.946. As of June 30, 2021, the amounts outstanding under the E.SUN Credit Facility was $20.4 million and the interest rates for these loans ranged from approximately 1.0% to 1.29% per annum. As of June 30, 2021, the amount available for future borrowing under the E.SUN Credit Facility was $9.6 million . Principal payments on short-term and long-term debt obligations are due as follows (in thousands): Fiscal Year: Principal Payments 2022 $ 63,490 2023 413 2024 4,957 2025 4,957 2026 4,957 2027 and thereafter 19,416 Total short-term and long-term debt $ 98,190

Other Long-term Liabilities

Other Long-term Liabilities	12 Months Ended
	Jun. 30, 2021
Other Liabilities Disclosure [Abstract]
Other Long-term Liabilities	Other Long-term Liabilities Other long-term liabilities as of June 30, 2021 and 2020 consisted of the following (in thousands): June 30, 2021 2020 Accrued unrecognized tax benefits including related interest and penalties $ 17,841 $ 15,496 Operating lease liability, non-current 14,539 18,102 Accrued warranty costs, non-current 2,678 2,395 Others 6,074 6,002 Total other long-term liabilities $ 41,132 $ 41,995

Leases

Leases	12 Months Ended
	Jun. 30, 2021
Leases [Abstract]
Leases	Leases The Company leases offices, warehouses and other premises, vehicles and certain equipment leased under non-cancelable operating leases. Operating lease expense recognized and supplemental cash flow information related to operating leases for the years ended June 30, 2021 and 2020 were as follows (in thousands): Years Ended June 30, 2021 2020 Operating lease expense (including expense for lease agreements with related parties of $1,319 and $1,421 for the years ended June 30, 2021 and 2020, respectively) $ 7,827 $ 6,993 Cash payments for operating leases (including payments to related parties of $1,351 and $1,443 for the years ended June 30, 2021 and 2020, respectively) 7,966 6,411 New operating lease assets obtained in exchange for operating lease liabilities 3,538 15,229 During the years ended June 30, 2021 and 2020, the Company's costs related to short-term lease arrangements for real estate and non-real estate assets were immaterial. Non-lease variable payments expensed in the years ended June 30, 2021, 2020 and 2019 were $1.8 million, $1.3 million and $0.0 million, respectively. As of June 30, 2021, the weighted average remaining lease term for operating leases was 3.8 years and the weighted average discount rate was 3.4%. Maturities of operating lease liabilities under noncancelable operating lease arrangements as of June 30, 2021 were as follows (in thousands): Fiscal Year: Maturities of operating leases 2022 $ 6,932 2023 5,430 2024 4,538 2025 4,382 2026 and beyond 1,017 Total future lease payments $ 22,299 Less: Imputed interest (1,438) Present value of operating lease liabilities $ 20,861 As of June 30, 2021, commitments under short-term lease arrangements and operating and financing leases that have not yet commenced were immaterial. The Company has entered into lease agreements with related parties. See Note 13, "Related Party Transactions" for a further discussion.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Jun. 30, 2021
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions The Company has a variety of business relationships with Ablecom and Compuware. Ablecom and Compuware are both Taiwan corporations. Ablecom is one of the Company’s major contract manufacturers; Compuware is both a distributor of the Company’s products and a contract manufacturer for the Company. Ablecom’s Chief Executive Officer, Steve Liang, is the brother of Charles Liang, the Company’s President, Chief Executive Officer and Chairman of the Board. Steve Liang and his family members owned approximately 28.8% of Ablecom’s stock and Charles Liang and his spouse, Sara Liu, who is also an officer and director of the Company, collectively owned approximately 10.5% of Ablecom’s capital stock as of June 30, 2021. Bill Liang, a brother of both Charles Liang and Steve Liang, is a member of the Board of Directors of Ablecom. Bill Liang is also the Chief Executive Officer of Compuware, a member of Compuware’s Board of Directors and a holder of a significant equity interest in Compuware. Steve Liang is also a member of Compuware’s Board of Directors and is an equity holder of Compuware. Charles Liang or Sara Liu do not own any capital stock of Compuware and the Company does not own any of Ablecom or Compuware's capital stock. Dealings with Ablecom The Company has entered into a series of agreements with Ablecom, including multiple product development, production and service agreements, product manufacturing agreements, manufacturing services agreements and lease agreements for warehouse space. Under these agreements, the Company outsources to Ablecom a portion of its design activities and a significant part of its server chassis manufacturing as well as an immaterial portion of other components. Ablecom manufactured approximately 91.8%, 95.5% and 96.3% of the chassis included in the products sold by the Company during fiscal years 2021, 2020 and 2019, respectively. With respect to design activities, Ablecom generally agrees to design certain agreed-upon products according to the Company’s specifications, and further agrees to build the tools needed to manufacture the products. The Company pays Ablecom for the design and engineering services, and further agrees to pay Ablecom for the tooling. The Company retains full ownership of any intellectual property resulting from the design of these products and tooling. With respect to the manufacturing aspects of the relationship, Ablecom purchases most of materials needed to manufacture the chassis from third parties and the Company provides certain components used in the manufacturing process (such as power supplies) to Ablecom through consignment or sales transactions. Ablecom uses these materials and components to manufacture the completed chassis and then sell them back to the Company. For the components purchased from the Company, Ablecom sells the components back to the Company at a price equal to the price at which the Company sold the components to Ablecom. The Company and Ablecom frequently review and negotiate the prices of the chassis the Company purchases from Ablecom. In addition to inventory purchases, the Company also incurs other costs associated with design services, tooling and other miscellaneous costs from Ablecom. The Company’s exposure to financial loss as a result of its involvement with Ablecom is limited to potential losses on its purchase orders in the event of an unforeseen decline in the market price and/or demand of the Company’s products such that the Company incurs a loss on the sale or cannot sell the products. Outstanding purchase orders from the Company to Ablecom were $40.2 million and $23.2 million at June 30, 2021 and 2020, respectively, representing the maximum exposure to financial loss. The Company does not directly or indirectly guarantee any obligations of Ablecom, or any losses that the equity holders of Ablecom may suffer. Since Ablecom manufactures substantially all the chassis that the Company incorporates into its products, if Ablecom were to suddenly be unable to manufacture chassis for the Company, the Company’s business could suffer if the Company is unable to quickly qualify substitute suppliers who can supply high-quality chassis to the Company in volume and at acceptable prices. Dealings with Compuware The Company has entered into a distribution agreement with Compuware, under which the Company appointed Compuware as a non-exclusive distributor of the Company’s products in Taiwan, China and Australia. Compuware assumes the responsibility to install the Company's products at the site of the end customer, if required, and administers customer support in exchange for a discount from the Company's standard price for its purchases. The Company also has entered into a series of agreements with Compuware, including a multiple product development, production and service agreements, product manufacturing agreements, and lease agreements for office space. Under these agreements, the Company outsources to Compuware a portion of its design activities and a significant part of its power supplies manufacturing as well as an immaterial portion of other components. With respect to design activities, Compuware generally agrees to design certain agreed-upon products according to the Company’s specifications, and further agrees to build the tools needed to manufacture the products. The Company pays Compuware for the design and engineering services, and further agrees to pay Compuware for the tooling. The Company retains full ownership of any intellectual property resulting from the design of these products and tooling. With respect to the manufacturing aspects of the relationship, Compuware purchases most of materials needed to manufacture the power supplies from outside markets and uses these materials to manufacture the products and then sell those products to the Company. The Company and Compuware frequently review and negotiate the prices of the power supplies the Company purchases from Compuware. Compuware also manufactures motherboards, backplanes and other components used on printed circuit boards for the Company. The Company sells to Compuware most of the components needed to manufacture the above products. Compuware uses the components to manufacture the products and then sells the products back to the Company at a purchase price equal to the price at which the Company sold the components to Compuware, plus a “manufacturing value added” fee and other miscellaneous material charges and costs. The Company and Compuware frequently review and negotiate the amount of the “manufacturing value added” fee that will be included in the price of the products the Company purchases from Compuware. In addition to the inventory purchases, the Company also incurs costs associated with design services, tooling assets, and miscellaneous costs. The Company’s exposure to financial loss as a result of its involvement with Compuware is limited to potential losses on its purchase orders in the event of an unforeseen decline in the market price and/or demand of the Company’s products such that the Company incurs a loss on the sale or cannot sell the products. Outstanding purchase orders from the Company to Compuware were $71.0 million and $45.7 million at June 30, 2021 and 2020, respectively, representing the maximum exposure to financial loss. The Company does not directly or indirectly guarantee any obligations of Compuware, or any losses that the equity holders of Compuware may suffer. The Company’s results from transactions with Ablecom and Compuware for each of the fiscal years ended June 30, 2021, 2020 and 2019 are as follows (in thousands): Years Ended June 30, 2021 2020 2019 Ablecom Purchases (1) $ 130,852 $ 160,084 $ 145,273 Compuware Net sales $ 27,865 $ 23,867 $ 17,651 Purchases (1) 115,213 131,763 139,579 __________________________ (1) Includes principally purchases of inventory and other miscellaneous items. The Company's net sales to Ablecom were not material for the fiscal years ended June 30, 2021, 2020 and 2019. The Company had the following balances related to transactions with Ablecom and Compuware as of June 30, 2021 and 2020 (in thousands): June 30, 2021 2020 Ablecom Accounts receivable and other receivables (1) $ 5,577 $ 6,379 Accounts payable and accrued liabilities (2) 41,194 40,056 Other long-term liabilities (3) — 513 Compuware Accounts receivable and other receivables (1) 18,371 14,323 Accounts payable and accrued liabilities (2) 46,430 46,518 Other long-term liabilities (3) — 186 __________________________ (1) Other receivables include receivables from vendors included in prepaid and other current assets. (2) Includes current portion of operating lease liabilities included in other current liabilities. (3) Represents non-current portion of operating lease liabilities. The Company procures certain semiconductor products from Monolithic Power Systems, Inc. (“MPS”), a fabless manufacturer of high-performance analog and mixed-signal semiconductors, for use in its products. Saria Tseng, who serves as a member on the Board of Directors, also serves as Vice President of Strategic Corporate Development, General Counsel and Secretary of MPS. The Company purchased $3.9 million, $5.2 million and $3.7 million of semiconductor products from MPS for use in its manufacturing process during the years ended June 30, 2021, 2020 and 2019, respectively. The amounts due to MPS as of June 30, 2021 and 2020 were not material. See Note 8, "Investment in a Corporate Venture" for a discussion of the investment and the transactions and balances in the Company's Corporate Venture.

Stock-based Compensation and St

Stock-based Compensation and Stockholders' Equity	12 Months Ended
	Jun. 30, 2021
Share-based Payment Arrangement [Abstract]
Stock-based Compensation and Stockholders' Equity	Stock-based Compensation and Stockholders’ Equity Equity Incentive Plan On June 5, 2020, the stockholders of the Company approved the 2020 Equity and Incentive Compensation Plan (the "2020 Plan"). The maximum number of shares available under the 2020 Plan is 5,000,000 plus 1,045,000 shares of common stock that remained available for future awards under the 2016 Equity Incentive Plan (the “2016 Plan”), at the time of adoption of the 2020 Plan. No other awards can be granted under the 2016 Plan and 7,246,000 shares of common stock remain reserved for outstanding awards issued under the 2016 Plan at the time of adoption of the 2020 Plan. Under the 2020 Plan, the Company can grant stock options, stock appreciation rights, restricted stock, restricted stock units, performance shares, performance units, dividend equivalents, and certain other awards, including those denominated or payable in, or otherwise based on, the Company’s common stock. The exercise price per share for incentive stock options granted to employees owning shares representing more than 10% of the Company's outstanding voting stock at the time of grant cannot be less than 110% of the fair value of the underlying shares on the grant date. Nonqualified stock options and incentive stock options granted to all other persons are granted at a price not less than 100% of the fair value. Options generally expire ten years after the date of grant. Stock options and RSUs generally vest over four years; 25% at the end of one year and one sixteenth per quarter thereafter. As of June 30, 2021, the Company had 2,730,277 authorized shares available for future issuance under the 2020 Plan. Common Stock Repurchase and Retirement On August 9, 2020, the Board approved a share repurchase program to repurchase up to an aggregate of $30.0 million of the Company's common stock at market prices. The program was effective until December 31, 2020 or if earlier, until the maximum amount of common stock is repurchased. During the three months ended September 30, 2020, 1,142,294 shares of common stock were repurchased for $30.0 million and the program ended. Repurchased shares were recorded as treasury shares in the Company's condensed consolidated balance sheet as of September 30, 2020. On December 11, 2020, the Company retired 2,475,419 shares of common stock, which were recorded as treasury stock in the Company's condensed consolidated balance sheet as of September 30, 2020. On October 31, 2020, the Board approved a share repurchase program to repurchase up to an aggregate of $50.0 million of the Company's common stock at market prices. The program was effective until October 31, 2021 or if earlier, until the maximum amount of common stock was repurchased. As of March 31, 2021, 1,675,746 shares of common stock were repurchased and retired for an aggregate $50.0 million and the program ended. On January 29, 2021, a duly authorized subcommittee of the Board approved a share repurchase program to repurchase up to an aggregate of $200.0 million of the Company's common stock at market prices. The program is effective until July 31, 2022 or if earlier, until the maximum amount of common stock is repurchased. 1,391,171 shares of common stock were repurchased and retired for an aggregate $50.0 million as of June 30, 2021. During the fiscal year ended June 30, 2021, the Company repurchased and retired 4,209,211 shares of common stock for an aggregated $130.0 million. Additionally, the Company retired 1,333,125 shares of common stock repurchased in prior years. Determining Fair Value The Company's fair value of RSUs and PRSUs is based on the closing market price of the Company's common stock on the date of grant. The Company estimates the fair value of stock options granted using the Black-Scholes-option-pricing model. This fair value is then amortized ratably over the requisite service periods of the awards, which is generally the vesting period. The key inputs in using the Black-Scholes-option-pricing model were as follows: Expected Term—The Company’s expected term represents the period that the Company’s stock-based awards are expected to be outstanding and was determined based on the Company's historical experience. Expected Volatility—Expected volatility is based on the Company's implied and historical volatility. Expected Dividend—The Black-Scholes valuation model calls for a single expected dividend yield as an input and the Company has no plans to pay dividends. Risk-Free Interest Rate—The risk-free interest rate used in the Black-Scholes valuation method is based on the United States Treasury zero coupon issues in effect at the time of grant for periods corresponding with the expected term of option. The fair value of stock option grants for the fiscal years ended June 30, 2021, 2020 and 2019 was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions: Years Ended June 30, 2021 2020 2019 Risk-free interest rate 0.27% - 1.09% 0.47% - 1.72% 2.32% - 2.97% Expected term 5.98 years 6.27 years 6.05 years Dividend yield — % — % — % Volatility 50.03% - 50.43% 49.61% - 50.46% 47.34% - 50.28% Weighted-average fair value $ 14.92 $ 9.59 $ 9.25 The following table shows total stock-based compensation expense included in the consolidated statements of operations for the fiscal years ended June 30, 2021, 2020 and 2019 (in thousands): Years Ended June 30, 2021 2020 2019 Cost of sales $ 1,762 $ 1,504 $ 1,663 Research and development 14,030 12,202 12,981 Sales and marketing 2,022 1,680 1,805 General and administrative 10,735 4,803 4,735 Stock-based compensation expense before taxes 28,549 20,189 21,184 Income tax impact (8,574) (6,814) (4,349) Stock-based compensation expense, net $ 19,975 $ 13,375 $ 16,835 As of June 30, 2021, $8.4 million of unrecognized compensation cost related to stock options is expected to be recognized over a weighted-average period of 4 years, $45.1 million of unrecognized compensation cost related to unvested RSUs is expected to be recognized over a weighted-average period of 2.73 years and $0.1 million of unrecognized compensation cost related to unvested PRSUs is expected to be recognized over a period of 0.36 year. Additionally, as described below, $10.5 million of unrecognized compensation cost related to the 2021 CEO Performance Stock Option is expected to be recognized over a period of 5 years. Stock Option Activity In March 2021, the Company’s Compensation Committee of the Board of Directors (the “Compensation Committee”) approved the grant of a stock option award for 1,000,000 shares of common stock to the Company’s CEO (the “2021 CEO Performance Stock Option”). The 2021 CEO Performance Stock Option has five vesting tranches with a vesting schedule based entirely on the attainment of operational milestones (performance conditions) and market conditions, assuming (1) continued employment either as the CEO or in such capacity as agreed upon between the Company’s CEO and the Board and (2) service through each vesting date. Each of the five vesting tranches of the 2021 CEO Performance Stock Option will vest upon certification by the Compensation Committee that both (i) the market price milestone for such tranche, which begins at $45.00 per share for the first tranche and increases up to $120.00 per share thereafter (based on a 60 calendar day average, counting only trading days), has been achieved, and (ii) any one of five operational milestones focused on total revenue, as reported under U.S. GAAP, have been achieved for the previous four consecutive fiscal quarters. Upon vesting and exercise, including the payment of the exercise price of $45.00 per share, prior to March 2, 2024, the Company’s CEO must hold shares that he acquires until March 2, 2024, other than those shares sold pursuant to a cashless exercise where shares are simultaneously sold to pay for the exercise price and any required tax withholding. The achievement status of the operational and stock price milestones as of June 30, 2021 was as follows: Annualized Revenue Milestone Achievement Status Stock Price Milestone Achievement Status (in billions) $4.0 Probable $45 Not met $4.8 Probable $60 Not met $5.8 Probable $75 Not met $6.8 Probable $95 Not met $8.0 — $120 Not met On the grant date, a Monte Carlo simulation was used to determine for each tranche (i) a fixed expense amount for such tranche and (ii) the future time when the market price milestone for such tranche was expected to be achieved, or its “expected market price milestone achievement time.” Separately, based on a subjective assessment of the Company’s future financial performance, each quarter, the Company will determine whether achievement is probable for each operational milestone that has not previously been achieved or deemed probable of achievement, and, if so, the future time when the Company expects to achieve that operational milestone, or its “expected operational milestone achievement time.” When the Company first determines that an operational milestone has become probable of being achieved, the Company will allocate the entire expense for the related tranche over the number of quarters between the grant date and the then-applicable “expected vesting time.” The “expected vesting time” at any given time is the later of (i) the expected operational milestone achievement time (if the related operational milestone has not yet been achieved) and (ii) the expected market price milestone achievement time (if the related market price milestone has not yet been achieved). The Company will immediately recognize a catch-up expense for all accumulated expenses from the grant date through the quarter in which the operational milestone was first deemed probable of being achieved. Each quarter thereafter, the Company will recognize the prorated portion of the then-remaining expense for the tranche based on the number of quarters between such quarter and the then-applicable expected vesting time, except that upon vesting of a tranche, all remaining expenses for that tranche will be immediately recognized. During the fiscal year ended June 30, 2021, the Company recognized compensation expense related to the 2021 CEO Performance Stock Option of $1.1 million. As of June 30, 2021, $10.5 million in unrecognized compensation cost related to the 2021 CEO Performance Stock Option is expected to be recognized over a period of 5 years. The following table summarizes stock option activity during the fiscal years ended June 30, 2021, 2020 and 2019 under all plans: Options Weighted Weighted Aggregate Balance as of June 30, 2018 8,301,138 $ 16.50 Granted 434,320 $ 18.58 Forfeited/Cancelled (1,360,823) $ 8.94 Balance as of June 30, 2019 7,374,635 $ 18.02 Granted 273,260 $ 19.61 Exercised (1,812,000) $ 15.74 Forfeited/Cancelled (456,127) $ 11.97 Balance as of June 30, 2020 5,379,768 $ 19.38 Granted 1,517,110 $ 40.49 Exercised (1,645,800) $ 17.25 Forfeited/Cancelled (75,524) $ 24.43 Balance as of June 30, 2021 5,175,554 $ 26.17 5.36 $ 57,099 Options vested and exercisable at June 30, 2021 3,448,888 $ 20.47 3.41 $ 50,887 The total pretax intrinsic value of options exercised during the fiscal year ended June 30, 2021, 2020 and 2019 was $24.3 million, $19.3 million and $0, respectively. Additional information regarding options outstanding as of June 30, 2021, is as follows: Options Outstanding Options Vested and Exercisable Range of Number Weighted- Weighted- Number Weighted- $9.24 - $12.50 521,886 1.54 $ 10.81 521,886 $ 10.81 $13.00 - $15.22 540,699 2.68 $ 14.33 490,794 $ 14.40 $17.09 - $18.93 714,906 3.17 $ 17.94 648,411 $ 17.97 $20.37 - $22.10 619,745 4.90 $ 21.13 547,375 $ 21.10 $22.15 - $25.44 614,906 5.81 $ 24.26 436,968 $ 24.67 $26.60 - $28.71 536,681 4.69 $ 27.08 529,181 $ 27.06 $30.33 - $38.50 590,341 7.26 $ 34.31 246,273 $ 34.48 $39.19 - $39.19 28,000 3.62 $ 39.19 28,000 $ 39.19 $42.35 - $42.35 8,390 4.82 $ 42.35 — $ — $45.00 - $45.00 1,000,000 9.67 $ 45.00 — $ — $9.24 - $45.00 5,175,554 5.36 $ 26.17 3,448,888 $ 20.47 RSU and PRSU Activity In January 2015, the Company began to grant RSUs to employees. The Company grants RSUs to certain employees as part of its regular employee equity compensation review program as well as to selected new hires. RSUs are typically service based share awards that entitle the holder to receive freely tradable shares of the Company's common stock upon vesting. In August 2017, the Compensation Committee granted two PRSU awards to the Company's Chief Executive Officer, both of which have both performance and service conditions. 50% of the PRSUs vested at June 30, 2018 when performance conditions were achieved, while the remainder vest in equal amounts over the following ten quarters subject to the continued employment of the CEO. As of June 30, 2021, the remaining 50% of the PRSUs had vested in accordance with the terms of the grant. In March 2020, the Compensation Committee granted a PRSU award to one of the Company's senior executives. The award vests in two tranches and includes service and performance conditions. Each tranche has 15,000 RSUs that vest in May 2021 and November 2021 based on service conditions only. Additional units can be earned based on revenue growth percentage in fiscal year 2020 compared to fiscal year 2019, which units would vest in May 2021, and based on revenue growth percentage in fiscal year 2021 compared to fiscal year 2020, which units would vest in November 2021. No additional units were earned for fiscal year 2020 as revenue decreased from fiscal year 2019. The following table summarizes RSUs and PRSUs activity during the fiscal years ended June 30, 2021 and 2020 under all plans: Time-based RSUs Outstanding Weighted PRSUs Outstanding Weighted Balance as of June 30, 2018 1,480,605 $ 23.34 120,000 $ 27.10 Granted 1,086,911 $ 18.37 — Released (1) (549,886) $ 24.87 — Forfeited (144,528) $ 20.25 — Balance as of June 30, 2019 1,873,102 $ 20.25 120,000 $ 27.10 Granted 943,650 $ 20.45 30,000 $ 20.37 Released (1) (871,274) $ 20.97 (108,000) $ 27.10 Forfeited (177,451) $ 19.49 — Balance as of June 30, 2020 1,768,027 $ 20.08 42,000 $ 22.29 Granted 1,334,418 $ 31.54 30,000 $ 34.27 Released (1) (984,406) $ 21.63 (27,000) $ 23.36 Forfeited (263,083) $ 25.01 (30,000) $ 20.37 Balance as of June 30, 2021 1,854,956 $ 26.79 15,000 $ 34.27 _________________ (1) The number of shares released excludes 172,857 RSUs that were vested but not released in fiscal year 2019. The number of vested but not released RSUs for fiscal years 2021 and 2020 was not material. The number of shares released also excludes 24,000 PRSUs that were vested but not released in fiscal year 2019. These vested RSUs and PRSUs were primarily released in fiscal year 2020 and included in fiscal year 2020 number upon the effectiveness of the Company's registration statement on Form S-8. The total pretax intrinsic value of RSUs and PRSUs vested was $32.6 million, $18.9 million and $14.3 million for the fiscal years ended June 30, 2021, 2020 and 2019, respectively. In fiscal years 2021, 2020 and 2019, the Company withheld 274,620, 331,648 and 175,044 shares with value equivalent to the employees' minimum statutory obligation for the applicable income and other employment taxes from the vesting and release of 1,011,406, 979,274 and 549,886 RSUs and PRSUs, respectively, and remitted the cash to the appropriate taxing authorities. The total shares withheld were based on the value of the RSUs on their respective vesting dates as determined by the Company's closing stock price. Total payments for the employees' tax obligations to tax authorities were $8.7 million, $8.2 million and $3.1 million for the fiscal years ended June 30, 2021, 2020 and 2019, respectively, and are reflected as a financing activity within the consolidated statements of cash flows. Pursuant to the terms of the 2020 and 2016 Plan, shares withheld in connection with net-share settlements are returned to the 2016 Plan and are available for future grants under the 2020 and 2016 Plan.

Income Taxes

Income Taxes	12 Months Ended
	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The components of income before income tax provision for the fiscal years ended June 30, 2021, 2020 and 2019 are as follows (in thousands): Years Ended June 30, 2021 2020 2019 United States $ 80,922 $ 35,701 $ 45,126 Foreign 37,706 49,127 44,397 Income before income tax provision $ 118,628 $ 84,828 $ 89,523 The income tax provision for the fiscal years ended June 30, 2021, 2020 and 2019, consists of the following (in thousands): Years Ended June 30, 2021 2020 2019 Current: Federal $ 3,406 $ 4,568 $ 12,308 State 1,077 1,727 2,917 Foreign 10,843 10,399 16,531 15,326 16,694 31,756 Deferred: Federal (5,489) (10,108) (13,078) State (409) (1,621) (2,888) Foreign (2,492) (2,043) (906) (8,390) (13,772) (16,872) Income tax provision $ 6,936 $ 2,922 $ 14,884 The Company’s net deferred tax assets as of June 30, 2021 and 2020 consist of the following (in thousands): June 30, 2021 2020 Research and development credits $ 30,540 $ 24,304 Deferred revenue 18,584 20,354 Inventory valuation 13,831 13,946 Capitalized research and development costs 15,206 7,509 Stock-based compensation 3,868 4,075 Lease obligations 2,861 3,632 Accrued vacation and bonus 5,098 3,281 Prepaid and accrued expenses 1,179 2,560 Warranty accrual 2,154 2,051 Bad debt and other reserves 1,668 1,917 Marketing fund accrual 720 548 Other 4,460 3,652 Total deferred income tax assets 100,169 87,829 Deferred tax liabilities-depreciation and other (4,137) (4,428) Right of use asset (2,831) (3,612) Valuation allowance (29,913) (24,891) Deferred income tax assets, net $ 63,288 $ 54,898 The Company assesses its deferred tax assets for recoverability on a regular basis, and where applicable, a valuation allowance is recorded to reduce the total deferred tax asset to an amount that will, more likely than not, be realized in the future. As of June 30, 2021, the Company believes that most of its deferred tax assets are “more-likely-than not” to be realized with the exception of state research and development tax credits that have not met the “more-likely than not” realization threshold criteria. As a result, at June 30, 2021, the gross excess credits of $37.1 million, or net of federal tax benefit of $29.3 million, are sub ject to a full valuation allowance. At June 30, 2020, the gross excess credits of $30.8 million , or net of federal tax benefit of $24.3 million , are subject to a full valuation allowance. The change in valuation allowance is $5.0 million and $3.9 million for the fiscal years ended June 30, 2021 and 2020, respectively. The Company will continue to review its deferred tax assets in accordance with the applicable accounting standards. The net deferred tax assets balance as of June 30, 2021 and 2020 was $63.3 million and $54.9 million, respectively. The 2017 Tax Reform Act also creates a new requirement that Global Intangible Low-Taxed Income (“GILTI”) earned by controlled foreign corporations (“CFCs”) that must be included currently in the gross income of a CFC’s U.S. stockholder starting in the tax year that begins after 2017. GILTI does not have material impact on the Company's income tax provision. Under U.S. GAAP, the Company is allowed to make an accounting policy choice of either (i) treating taxes due on future U.S. inclusions in taxable income related to GILTI as a current-period expense when incurred (the “period cost method”) or (ii) factoring such amounts into a company’s measurement of its deferred taxes. The Company's selection of an accounting policy with respect to the GILTI tax rules is to treat GILTI tax as a current period expense under the period cost method. Under the 2017 Tax Reform Act, starting on July 1, 2018, the Company is no longer subject to federal income tax on earnings remitted from our foreign subsidiaries. The Company previously asserted that all of its foreign undistributed earnings were indefinitely reinvested. As a result of the 2017 Tax Reform Act, the Company has determined that its foreign undistributed earnings are indefinitely reinvested except for Netherlands. The Company may repatriate foreign earnings from Netherlands which are previously taxed income as a result of the 2017 Tax Reform Act. The tax impact of such repatriation is estimated to be immaterial. As a result of the 2017 Tax Reform Act, in December 2019, the Company realigned its international business operations and group structure. As a part of this restructuring, the Company moved certain intellectual property back to the United States. As a result of this restructuring, the Company estimated approximately $3.0 million and $1.9 million additional tax benefit from foreign derived intangible income in fiscal years 2021 and 2020 as compared to fiscal year 2019. On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) was enacted. The CARES Act provides temporary relief from certain aspects of the 2017 Tax Reform Act that imposed limitations on the utilization of certain losses, interest expense deductions, alternative minimum tax credits and made a technical correction to the 2017 Tax Reform Act related to the depreciable life of qualified improvement property. The CARES Act did not have a material impact on the Company. The following is a reconciliation for the fiscal years ended June 30, 2021, 2020 and 2019, of the statutory rate to the Company’s effective federal tax rate: Years Ended June 30, 2021 2020 2019 Income tax provision at statutory rate 21.0 % 21.0 % 21.0 % State income tax, net of federal tax benefit 0.3 — 0.5 Foreign rate differential (0.5) — 1.1 Research and development tax credit (10.5) (13.1) (9.5) Uncertain tax positions, net of (settlement) with Tax Authorities 2.0 (2.3) 4.1 Foreign derived intangible / Subpart F income inclusion (2.5) (3.8) (2.1) Stock-based compensation (3.3) (2.8) 2.1 Non deductible penalty on SEC matter — 4.4 — Provision to return true-up (1.9) (1.1) (1.6) Other, net 1.2 1.1 1.0 Effective tax rate 5.8 % 3.4 % 16.6 % As of June 30, 2021, the Company had state research and development tax credit carryforwards of $50.2 million. The state research and development tax credits will carryforward indefinitely to offset future state income taxes. The following table summarizes the activity related to the unrecognized tax benefits (in thousands): Gross* Balance at June 30, 2018 $ 25,117 Gross increases: For current year’s tax positions 7,789 For prior years’ tax positions — Gross decreases: Decreases due to settlements with taxing authority (1,504) Decreases due to lapse of statute of limitations (3,354) Balance at June 30, 2019 28,048 Gross increases: For current year’s tax positions 8,769 For prior years’ tax positions 505 Gross decreases: Decreases due to settlements with taxing authority (7,632) Decreases due to lapse of statute of limitations (2,484) Balance at June 30, 2020 27,206 Gross increases: For current year’s tax positions 13,333 For prior years’ tax positions 1,439 Gross decreases: Decreases due to lapse of statute of limitations (1,243) Balance at June 30, 2021 $ 40,735 ________________________ *excludes interest, penalties, federal benefit of state reserves The total amount of unrecognized tax benefits that would affect the effective tax rate, if recognized, was $27.1 million and $13.4 million as of June 30, 2021 and 2020, respectively. The Company’s policy is to include interest and penalties related to unrecognized tax benefits within the income tax provision in the consolidated statements of operations. As of June 30, 2021 and 2020, the Company had accrued $2.5 million and $2.1 million for the payment of interest and penalties relating to unrecognized tax benefits, respectively. In October 2019, the Taiwan tax authority completed its audit in Taiwan for fiscal year 2018 and proposed a transfer pricing adjustment on the Company which resulted in additional tax liability of $1.6 million. The Company accepted the proposed adjustment in October 2019 and paid the $1.6 million tax liability in February 2020. In February 2020, the Taiwan tax authority completed its audit in Taiwan for fiscal year 2019 and proposed a transfer pricing adjustment on the Company which resulted in additional tax liability of $1.0 million. The Company accepted the proposed adjustment and paid the $1.0 million tax liability in February 2020. The impact of these adjustments on the income statement was offset by the release of previously unrecognized tax benefits related to the fiscal years audited in the periods in which the proposed adjustments were accepted. The Company believes that it has adequately provided reserves for all uncertain tax positions; however, amounts asserted by tax authorities could be greater or less than the Company’s current position. Accordingly, the Company’s provision on federal, state and foreign tax related matters to be recorded in the future may change as revised estimates are made or as the underlying matters are settled or otherwise resolved. The federal statute of limitations remains open in general for tax years ended June 30, 2018 through 2021. Various states statute of limitations remains open in general for tax years ended June 30, 2017 through 2021. Certain statutes of limitations in major foreign jurisdictions remain open in general for the tax years ended June 30, 2016 through 2021. It is reasonably possible that our gross unrecognized tax benefits will decrease by approximately $1.0 million, in the next 12

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Jun. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Litigation and Claims— On February 8, 2018, two putative class action complaints were filed against the Company, the Company's Chief Executive Officer, and the Company's former Chief Financial Officer in the U.S. District Court for the Northern District of California ( Hessefort v. Super Micro Computer, Inc., et al. , No. 18-cv-00838 and United Union of Roofers v. Super Micro Computer, Inc., et al. , No. 18-cv-00850 ). The complaints contain similar allegations, claiming that the defendants violated Section 10(b) of the Securities Exchange Act due to alleged misrepresentations and/or omissions in public statements regarding recognition of revenue. The court subsequently appointed New York Hotel Trades Council & Hotel Association of New York City, Inc. Pension Fund as lead plaintiff. The lead plaintiff then filed an amended complaint naming the Company's Senior Vice President of Investor Relations as an additional defendant. On June 21, 2019, the lead plaintiff filed a further amended complaint naming the Company's former Senior Vice President of International Sales, Corporate Secretary, and Director as an additional defendant. On July 26, 2019, the Company filed a motion to dismiss the complaint. On March 23, 2020, the Court granted the Company’s motion to dismiss the complaint, with leave for lead plaintiff to file an amended complaint within 30 days. On April 22, 2020, lead plaintiff filed a further amended complaint. On June 5, 2020, the Company filed a motion to dismiss the further amended complaint, the hearing for which was calendared for September 23, 2020; however, the Court held a conference on September 15 to discuss how the Court could efficiently address the recent SEC settlement agreement. The parties stipulated to allow plaintiffs to further amend the complaint solely to add allegations relating to the SEC settlement. On October 14, 2020, plaintiffs filed a Fourth Amended Complaint. On October 28, 2020, defendants filed a supplemental motion to dismiss. On March 29, 2021, the Court granted in part and denied in part defendants’ motions to dismiss. Plaintiffs’ claims under Sections 10(b) and 20 of the Exchange Act were dismissed with prejudice as against the Company’s former head of Investor Relations, Perry Hayes. Plaintiffs’ Section 10(b) claim, but not the Section 20 claim, was likewise dismissed as to Wally Liaw, a founder, former director, and former SVP of International Sales. The Court denied the motions to dismiss the Section 10(b) and Section 20 claims against the Company, Charles Liang, and Howard Hideshima, the Company’s former CFO. Discovery has commenced, and the Court has calendared a hearing on class certification for January 20, 2022. The Company intends to defend the lawsuit vigorously. On October 27, 2020, certain current and former directors and officers of the Company were named as defendants in a putative derivative lawsuit filed in the Superior Court of the State of California, County of Santa Clara (the “Court”), captioned Barry v. Liang, et al., 20-CV-372190. The Company was also named as a nominal defendant. The complaint purports to allege claims for breaches of fiduciary duties, waste of corporate assets, and unjust enrichment arising out of allegations that the Company’s officers and directors caused the Company to issue false and misleading statements about recognition of revenue and the effectiveness of its internal controls, failed to adopt and implement effective internal controls, and failed to timely file various reports with the Securities and Exchange Commission. The plaintiff seeks unspecified compensatory damages and other equitable relief. Defendants filed demurrers, which were set for hearing on August 4, 2021, but which were continued to September 15, 2021. Following this continuance, on July 21, 2021, Plaintiffs' counsel filed an amended complaint in lieu of responding to the demurrer. The amended complaint added no new claims; primarily, the amendment added allegations describing the March 29, 2021 motion to dismiss decision in the Hessefort class action. Defendants demurred to the amended complaint on August 24, 2021, and the Court has calendared the hearing for November 24, 2021. The case is otherwise currently stayed. The Company intends to defend the lawsuit vigorously. On May 5, 2021, certain current and former directors and officers of the Company were named as defendants in a putative derivative lawsuit filed in the U.S. District Court for the Northern District of California, captioned Stein v. Liang, et al. , Case No. 3:21-cv-03357-KAW (the “Stein Derivative Action”). The Company was also named as a nominal defendant. The complaint purports to allege claims for breaches of fiduciary duties, waste of corporate assets, unjust enrichment, and contribution for violations of federal securities laws arising out of allegations that the Company’s officers and directors caused the Company to issue false and misleading statements about recognition of revenue and the effectiveness of its internal controls, failed to adopt and implement effective internal controls, and failed to timely file various reports with the Securities and Exchange Commission. The plaintiff seeks unspecified compensatory damages and other equitable relief. Defendants filed motions to dismiss the complaint on August 6, 2021, and the Court has calendared the hearing for November 4, 2021. The Company intends to defend the lawsuit vigorously. SEC Matter— The Company cooperated with the SEC in its investigation of marketing expenses that contained certain irregularities discovered by Company management, which irregularities were disclosed on August 31, 2015, and the Company cooperated with the SEC in its further investigation of the matters underlying the Company’s inability to timely file its Form 10-K for the fiscal year ended June 30, 2017 and concerning the publication of a false and widely discredited news article in October 2018 concerning the Company’s products. On August 25, 2020, to fully resolve all matters under investigation, the Company consented to entry of an Order Instituting Cease-and-Desist Proceedings Pursuant to Section 8A of the Securities Act of 1933 and Section 21C of the Securities Exchange Act of 1934, Making Findings, and Imposing a Cease-and-Desist Order (“Order”), as announced by the SEC. The Company admitted the SEC’s jurisdiction over the Company and the subject matter of the proceedings, but otherwise neither admitted nor denied the SEC’s findings, as described in the Order. The Company agreed to cease and desist from committing or causing any violations and any future violations of Sections 17(a)(2) and (3) of the Securities Act and Sections 13(a), 13(b)(2)(A), and 13(b)(2)(B), of the Exchange Act and Rules 12b-20, 13a-1, 13a-11, and 13a-13 thereunder. The Company agreed and paid a civil money penalty of $17,500,000 during the three months ended September 30, 2020, which was recorded to general and administrative expense in the Company's consolidated statement of operations. In addition, the Company’s Chief Executive Officer concluded a settlement with the SEC on August 25, 2020, as announced by the SEC. The Company’s Chief Executive Officer paid the Company the sum of $2,122,000 as reimbursement of profits from certain stock sales during the relevant period, pursuant to Section 304 of the Sarbanes-Oxley Act of 2002. The settlement amount was paid during the first quarter of fiscal 2021 and the Company recorded the payment as a credit to general and administrative expense. Other legal proceedings and indemnifications From time to time, the Company has been involved in various legal proceedings arising from the normal course of business activities. The resolution of any such matters have not had a material impact on the Company’s consolidated financial condition, results of operations or liquidity as of June 30, 2021 and any prior periods. The Company has entered into indemnification agreements with its current and former directors and executive officers. Under these agreements, the Company has agreed to indemnify such individuals to the fullest extent permitted by law against liabilities that arise by reason of their status as directors or officers and to advance expenses incurred by such individuals in connection with related legal proceedings. It is not possible to determine the maximum potential amount of payments the Company could be required to make under these agreements due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each claim. However, the Company maintains directors and officers liability insurance coverage to reduce its exposure to such obligations. Purchase Commitments - The Company has agreements to purchase inventory and non-inventory items primarily through the next 12 months. As of June 30, 2021, these remaining noncancelable commitments were $569.8 million, including $111.2 million for related parties. Standby Letter of Credit - In October 2019, Bank of America increased the value of a previously issued standby letter of credit to a beneficiary from $3.2 million to $6.4 million to facilitate ongoing operations of the Company. The standby letter of credit is cancellable upon written notice from the issuer. No amounts have been drawn under the standby letter of credit. In May 2021, the standby letter of credit was cancelled. Lease Commitments - See Note 12, "Leases," for a discussion of the Company's operating lease and financing lease commitments.

Retirement Plans

Retirement Plans	12 Months Ended
	Jun. 30, 2021
Retirement Benefits [Abstract]
Retirement Plans	Retirement Plans The Company sponsors a 401(k) savings plan for eligible United States employees and their beneficiaries. Contributions by the Company are discretionary, and no contributions have been made by the Company for the fiscal years ended June 30, 2021, 2020 and 2019. Beginning in March 2003, employees of Super Micro Computer, B.V. are required to deduct a portion of their gross wages based on a defined age-dependent premium and invest the amount in a defined contribution plan. The Company is required to match the amount that is deducted monthly from employees’ wages. Similar to contributions into a 401(k) plan, the Company's obligation is limited to the contributions made to the contribution plan. Investment risk and investment rewards are assumed by the employees and not by the Company. For the fiscal years ended June 30, 2021, 2020 and 2019, the Company’s matching contribution was $0.7 million, $0.6 million, and $0.5 million, respectively. The Company contributes to a defined contribution pension plan administered by the government of Taiwan that covers all eligible employees within Taiwan. Pension plan benefits are based primarily on participants’ compensation and years of service credited as specified under the terms of Taiwan’s plan. The funding policy is consistent with the local requirements of Taiwan. The Company's obligation is limited to the contributions made to the pension plan. The Company has no control over the investment strategy of the assets of the government administered pension plan. For the fiscal years ended June 30, 2021, 2020 and 2019, the Company’s contribution was $2.5 million, $1.9 million and $1.6 million, respectively. The Company has a defined benefit pension plan under the R.O.C. Labor Standards Law for certain employees of Super Micro Computer, Inc. Taiwan that provides benefits based on an employee’s length of service and average monthly salary for the six-month period prior to retirement. The Company contributes an amount equal to 2% of salaries paid each month to the pension fund (the “Fund” ), which is administered by the Labor Pension Fund Supervisory Committee (the “Committee” ) and deposited in the Committee’s name in the Bank of Taiwan. Before the end of each year, the Company assesses the balance in the Fund. If the amount of the balance in the Fund is inadequate to pay retirement benefits for eligible employees in the next year, the Company is required to fund the difference in one appropriation that should be made before the end of March 31 of the next year. The Fund is operated and managed by the government’s designated authorities. As such, the Company does not have any right to intervene in the investments of the Fund. For the fiscal year ended June 30, 2021, the Company recorded a pension expense of $1.0 million. For the fiscal years ended June 30, 2020 and 2019, the Company’s pension expense was immaterial.

Segment Reporting

Segment Reporting	12 Months Ended
	Jun. 30, 2021
Segment Reporting [Abstract]
Segment Reporting	Segment Reporting The Company operates in one operating segment that develops and provides high performance server solutions based upon an innovative, modular and open-standard architecture. The Company’s chief operating decision maker is the Chief Executive Officer. The following is a summary of property, plant and equipment, net (in thousands): June 30, 2021 2020 Long-lived assets: United States $ 180,143 $ 178,812 Asia 91,640 51,605 Europe 2,930 3,368 $ 274,713 $ 233,785 The Company’s revenue is presented on a disaggregated basis in Note 3, “Revenue” by type of product and by geographical market.

Organization and Summary of S_2

Organization and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”). The consolidated financial statements of Super Micro Computer include the accounts of Super Micro Computer and entities consolidated under the variable interest model or the voting interest model. Noncontrolling interests are not presented separately in the consolidated statements of operations, and consolidated statements of comprehensive income as the amounts are immaterial. All intercompany accounts and transactions of Super Micro Computer and its consolidated entities (collectively, the "Company") have been eliminated in consolidation. For equity investments over which the Company is able to exercise significant influence over the investee but does not control the investee, and is not the primary beneficiary of the investee’s activities are accounted for using the equity method. Investments in equity securities which do not have readily determinable fair values and for which the Company is not able to exercise significant influence over the investee are accounted for under the measurement alternative which is the cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar securities of the same investee.
Use of Estimates	Use of EstimatesU.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Such estimates include, but are not limited to revenue recognition, allowances for doubtful accounts and sales returns, inventory valuation, useful lives of property, plant and equipment, product warranty accruals, stock-based compensation, impairment of investments and long-lived assets, and income taxes. The Company’s estimates are evaluated on an ongoing basis and changes in the estimates are recognized prospectively. Actual results could differ from those estimates. The Company considered estimates of the economic implications of the COVID-19 pandemic on its critical and significant accounting estimates, including an assessment of the collectability of each customer contract as part of the revenue recognition process, assessment of the valuation of accounts receivable, assessment of provision for excess and obsolete inventory and an impairment of long-lived assets.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The Company accounts for certain assets and liabilities at fair value, which is the price that would be received upon the sale of an asset or paid to transfer a liability in an orderly arms-length transaction between market participants. When measuring fair value, the Company takes into account the characteristics of the asset or liability that a market participant would consider when pricing the asset or liability at the measurement date. The Company considers one or more techniques for measuring fair value: market approach, income approach, and cost approach. The valuation techniques include inputs that are based on three different levels of observability to the market. The Company categorizes each of its fair value measurements in one of these three levels based on the lowest level input that is significant to the fair value measurement in its entirety. These levels are: • Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities; • Level 2 - Quoted prices in markets that are not active or financial instruments for which all significant inputs are observable, either directly or indirectly; and • Level 3 - Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable.
Cash and Cash Equivalents, Restricted Cash and Cash Equivalents	Cash and Cash Equivalents The Company considers all highly liquid instruments with an original maturity of three months or less from the date of purchase to be cash equivalents. Cash equivalents consist primarily of money market funds and certificates of deposit with original maturities of less than three months. Restricted Cash and Cash Equivalents
Inventories	Inventories Inventories are stated at lower of cost, using weighted average cost method, or net realizable value. Net realizable value is the estimated selling price of the Company's products in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. Inventories consist of purchased parts and raw materials (principally electronic components), work in process (principally products being assembled) and finished goods. The Company evaluates inventory on a quarterly basis for excess and obsolescence and lower of cost or net realizable value and, as necessary, writes down the valuation of inventories based upon the Company's inventory aging, forecasted usage and sales, anticipated selling price, product obsolescence and other factors. Once inventory is written down, its new value is maintained until it is sold or scrapped. The Company receives various rebate incentives from certain suppliers based on its contractual arrangements, including volume-based rebates. The rebates earned are recognized as a reduction of cost of inventories and reduce the cost of sales in the period when the related inventory is sold.
Property, Plant and Equipment	Property, Plant and EquipmentProperty, plant and equipment is recorded at cost and depreciated using the straight-line method over the estimated useful lives of the related assets
Long-Lived Assets	Long-Lived AssetsThe Company evaluates its long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. When the sum of the undiscounted future net cash flows expected to result from the use of the asset and its eventual disposition is less than its carrying amount, an impairment loss would be measured based on the fair value of the asset compared to the carrying amount.
Revenue Recognition	Revenue Recognition The Company generates revenues from the sale of server and storage systems, subsystems, accessories, services, server software management solutions, and support services. Product sales . The Company recognizes revenue from sales of products as control is transferred to customers, which generally happens at the point of shipment or upon delivery, unless customer acceptance is uncertain. Products sold by the Company are delivered via shipment from the Company’s facilities or drop shipment directly to its customers from a Company vendor. The Company may use distributors to sell products to end customers. Revenue from distributors is recognized when the distributor obtains control of the product, which generally happens at the point of shipment or upon delivery. The Company applies judgment in determining the transaction price as the Company may be required to estimate variable consideration when determining the amount of revenue to recognize. As part of determining the transaction price in contracts with customers, the Company estimates reserves for future sales returns based on a review of its history of actual returns for each major product line. Based upon historical experience, a refund liability is recorded at the time of sale for estimated product returns and an asset is recognized for the amount expected to be recorded in inventory upon product return, less the expected recovery costs. The Company also reduces revenue for the estimated costs of customer and distributor programs and incentive offerings such as price protection and rebates as well as the estimated costs of cooperative marketing arrangements where the fair value of the benefit derived from the costs cannot be reasonably estimated. Any provision for customer and distributor programs and other discounts is recorded as a reduction of revenue at the time of sale based on an evaluation of the contract terms and historical experience. Services sales. The Company’s sale of services mainly consists of extended warranty and on-site services. Revenue related to extended warranty commences upon the expiration of the standard warranty period and is recognized ratably over the contractual period as the Company stands ready to perform any required warranty service. Revenue related to on-site services commences upon recognition of the product sale and is recognized ratably over the contractual period as the on-site services are made available to the customer. These service contracts are typically one to five years in length. Service revenue has been less than 10% of net sales for all periods presented and is not separately disclosed. Contracts with multiple promised goods and services. Certain of the Company’s contracts contain multiple promised goods and services. The Company assesses whether each promised good or service is distinct for the purpose of identifying the performance obligations in the contract. This assessment involves subjective determinations and requires management to make judgments about the individual promised goods or services and whether such goods or services are separable from the other aspects of the contractual relationship. Performance obligations in a contract are identified based on the promised goods or services that will be transferred to the customer that are both capable of being distinct, whereby the customer can benefit from the service either on its own or together with other resources that are readily available from third parties or from the Company, and are distinct in the context of the contract, whereby the transfer of the services is separately identifiable from other promises in the contract. If these criteria are not met, the promised goods and services are accounted for as a combined performance obligation. Revenue allocated to each performance obligation is recognized at the time the related performance obligation is satisfied by transferring control of the promised good or service to a customer. If the contract contains a single performance obligation, the entire transaction price is allocated to the single performance obligation. Contracts that contain multiple performance obligations require an allocation of the transaction price to each performance obligation based on a relative standalone selling price basis. The Company determines standalone selling prices based on the price at which the performance obligation is sold separately. If the standalone selling price is not observable through past transactions, the Company applies judgment to estimate the standalone selling price taking into account available information, such as internally approved pricing guidelines with respect to geographies, customer type, internal costs, and gross margin objectives, for the related performance obligations. When the Company receives consideration from a customer prior to transferring goods or services to the customer, the Company records a contract liability (deferred revenue). The Company also recognizes deferred revenue when it has an unconditional right to consideration (i.e., a receivable) before transfer of control of goods or services to a customer.
Allowance for Doubtful Accounts	Allowances for Doubtful AccountsCustomers are subjected to a credit review process that evaluates each customer’s financial position and ability and intent to pay. On a quarterly basis, the Company makes estimates of its uncollectible accounts receivable by analyzing the aging of accounts receivable, history of bad debts, customer concentrations, customer-credit-worthiness, and current economic trends to evaluate the adequacy of the allowance for doubtful accounts.
Cost of Sales	Cost of Sales Cost of sales primarily consists of the costs of materials, contract manufacturing, in-bound shipping, personnel and related expenses including stock-based compensation, equipment and facility expenses, warranty costs and provision for lower of cost or net realizable value and excess and obsolete inventory.
Product Warranties	Product WarrantiesThe Company offers product warranties typically ranging from 15 to 39 months against any defective products. These standard warranties are assurance type warranties and the Company does not offer any services beyond the assurance that the product will continue working as specified. Therefore, these warranties are not considered separate performance obligations in the arrangement. Based on historical experience, the Company accrues for estimated returns of defective products at the time revenue is recognized. The Company monitors warranty obligations and may make revisions to its warranty reserve if actual costs of product repair and replacement are significantly higher or lower than estimated. Accruals for anticipated future warranty costs are recorded to cost of sales and included in accrued liabilities and other long-term liabilities. Warranty accruals are based on estimates that are updated on an ongoing basis taking into consideration inputs such as new product introductions, changes in the volume of claims compared with the Company's historical experience, and the changes in the cost of servicing warranty claims. The Company accounts for the effect of such changes in estimates prospectively.
Research and Development	Research and Development Research and development expenses consist of personnel expenses including salaries, benefits, stock-based compensation and incentive bonuses, and related expenses for the Company's research and development personnel, as well as materials and supplies, consulting services, third-party testing services and equipment and facility expenses related to the Company's research and development activities. All research and development costs are expensed as incurred. The Company occasionally receives funding from certain suppliers and customers towards its development efforts. Such amounts are recorded as a reduction of research and development expenses and were $10.9 million, $2.1 million, and $2.8 million for the fiscal years ended June 30, 2021, 2020 and 2019, respectively. During the fiscal year ended June 30, 2020, the Company also recorded a $9.5 million net settlement fee as a reduction in the research and development expenses related to the reimbursement of previously incurred expenses for one canceled joint product development agreement. Software development costs, including costs to develop software sold, leased, or otherwise marketed, that are incurred subsequent to the establishment of technological feasibility are capitalized if significant. Costs incurred during the application development stage for internal-use software are capitalized if significant. Capitalized software development costs are amortized using the straight-line amortization method over the estimated useful life of the applicable software. Such software development costs required to be capitalized have not been material to date.
Advertising Costs	Advertising Costs    Advertising costs, net of reimbursements received under the cooperative marketing arrangements with the Company's vendors, are expensed as incurred.
Stock-Based Compensation	Stock-Based Compensation The Company measures and recognizes compensation expense for all share-based awards made to employees and non-employees, including stock options, restricted stock units ("RSUs") and performance-based restricted stock units (“PRSUs”). The Company recognizes the grant date fair value of all share-based awards over the requisite service period and accounts for forfeitures as they occur. Stock option and RSU awards are recognized to expense on a straight-line basis over the requisite service period. PRSU awards are recognized to expense using an accelerated method only when it is probable that a performance condition is met during the vesting period. If it is not probable, no expense is recognized and the previously recognized expense is reversed. The Company bases initial accrual of compensation expense on the estimated number of PRSUs that are expected to vest over the requisite service period. That estimate is revised if subsequent information indicates that the actual number of PRSUs is likely to differ from previous estimates. The cumulative effect on current and prior periods of a change in the estimated number of PRSUs expected to vest is recognized in stock-based compensation expense in the period of the change. Previously recognized compensation expense is not reversed if vested stock options, RSUs or PRSUs for which the requisite service has been rendered and the performance condition has been met expire unexercised or are not settled. The fair value of RSUs and PRSUs is based on the closing market price of the Company's common stock on the date of grant. The Company estimates the fair value of stock options granted using a Black-Scholes option pricing model. This model requires the Company to make estimates and assumptions with respect to the expected term of the option and the expected volatility of the price of the Company's common stock. The expected term represents the period that the Company’s stock-based awards are expected to be outstanding and was determined based on the Company's historical experience. The expected volatility is based on the historical volatility of the Company’s common stock. The fair value is then amortized on a straight-line basis over the requisite service periods of the awards, which is generally the vesting period.
Leases	Leases The Company has arrangements for the right to use certain of its office, warehouse spaces and other premises, and equipment. The Company determines at inception if an arrangement is or contains a lease. When the terms of a lease effectively transfer control of the underlying asset to the Company, it is classified as a finance lease. All other leases are classified as operating leases. Operating Leases For operating leases with lease terms of more than 12 months, operating lease right-of-use ("ROU") assets are recorded in long-term other assets, and lease liabilities are recorded in accrued liabilities and other long-term liabilities on the consolidated balance sheet. The Company's lease term includes options to extend or terminate the lease when it is reasonably certain that it will exercise that option. The Company elected to apply the short-term lease recognition exemption and does not recognize ROU asset and lease liabilities for leases with an initial term of 12 months or less and recognizes as expense the payments under such leases on a straight-line basis over the lease term. The Company's leases with an initial term of 12 months or less are immaterial. Operating lease ROU assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments over the lease term. Operating lease ROU assets and liabilities are recognized at lease commencement based on the present value of the remaining lease payments discounted using the Company’s incremental borrowing rate as the interest rate implicit in the lease arrangements is not readily determinable. The incremental borrowing rate is estimated to be the interest rate on a fully collateralized basis with similar terms and payments and in the economic environment where the leased asset is located. Operating lease ROU assets also include initial direct costs incurred, prepaid lease payments, minus any lease incentives. Operating lease expense is recognized on a straight-line basis over the lease term. The Company accounts for fixed payments for lease and non-lease components as a single lease component which increases the amount of ROU assets and liabilities. Non-lease components that are variable costs, such as common area maintenance, are expensed as incurred and not included in the ROU assets and lease liabilities. Finance Leases Assets under finance leases are recorded in property, plant and equipment, net and lease liabilities are included in accrued liabilities and other long-term liabilities on the consolidated balance sheet. Finance lease interest expense is recognized based on an effective interest method and depreciation of assets is recorded on a straight-line basis over the shorter of the lease term and useful life of the asset. The Company's finance leases are immaterial.
Income Taxes	Income Taxes The Company accounts for income taxes under an asset and liability approach. Deferred income taxes reflect the impact of temporary differences between assets and liabilities recognized for financial reporting purposes and such amounts recognized for income tax reporting purposes, net of operating loss carry-forwards and other tax credits measured by applying enacted tax laws related to the financial statement periods. Valuation allowances are provided when necessary to reduce deferred tax assets to an amount that is more likely than not to be realized. The Company recognizes tax liabilities for uncertain income tax positions on the income tax return based on the two-step process. The first step is to determine whether it is more likely than not that each income tax position would be sustained upon audit. The second step is to estimate and measure the tax benefit as the amount that has a greater than 50% likelihood of being realized upon ultimate settlement with the tax authority. Estimating these amounts requires the Company to determine the probability of various possible outcomes. The Company evaluates these uncertain tax positions on a quarterly basis. This evaluation is based on the consideration of several factors, including changes in facts or circumstances, changes in applicable tax law, settlement of issues under audit and new exposures. If the Company later determines that its exposure is lower or that the liability is not sufficient to cover its revised expectations, the Company adjusts the liability and effects a related charge in its tax provision during the period in which the Company makes such a determination.
Variable Interest Entities	Variable Interest Entities The Company determines at the inception of each arrangement whether an entity in which the Company holds an investment or in which the Company has other variable interests is considered a variable interest entity ("VIE"). The Company consolidates VIEs when it is the primary beneficiary. The primary beneficiary of a VIE is the party that meets both of the following criteria: (1) has the power to make decisions that most significantly affect the economic performance of the VIE and (2) has the obligation to absorb losses or the right to receive benefits that in either case could potentially be significant to the VIE. Periodically, the Company assesses whether any changes in the interest or relationship with the entity affect the determination of whether the entity is still a VIE and, if so, whether the Company is the primary beneficiary. If the Company is not the primary beneficiary in a VIE, the Company accounts for the investment or other variable interest in accordance with applicable GAAP. The Company has concluded that Ablecom Technology, Inc. (“Ablecom”) and its affiliate, Compuware Technology, Inc. ("Compuware"), are VIEs; however, the Company is not the primary beneficiary as it does not have the power to direct the activities that are most significant to the entities and therefore, the Company does not consolidate these entities. In performing its analysis, the Company considered its explicit arrangements with Ablecom and Compuware, all contractual arrangements with these entities. Also, as a result of the substantial related party relationships between the Company and these entities, the Company considered whether any implicit arrangements exist that would cause the Company to protect these related parties’ interests from suffering losses. The Company determined it has no material implicit arrangements with Ablecom, Compuware or their shareholders. The Company and Ablecom jointly established Super Micro Asia Science and Technology Park, Inc. (the "Management Company") in Taiwan to manage the common areas shared by the Company and Ablecom for its separately constructed manufacturing facilities. In fiscal year 2012, each party contributed $0.2 million for a 50% ownership interest of the Management Company. The Company has concluded that the Management Company is a VIE, and the Company is the primary beneficiary as it has the power to direct the activities that are most significant to the Management Company. For the fiscal years ended 2021, 2020 and 2019, the accounts of the Management Company were consolidated with the accounts of Super Micro Computer, and a noncontrolling interest was recorded for Ablecom's interest in the net assets and operations of the Management Company. Net income (loss) attributable to Ablecom's interest was not material for the periods presented and was included in general and administrative expenses in the Company's consolidated statements of operations.
Foreign Currency Transactions	Foreign Currency Transactions The functional currency of the Company’s international subsidiaries is the U.S. dollar, with the exception of Super Micro Asia and Technology Park, Inc., a consolidated variable interest entity. Monetary assets and liabilities of the Company's international subsidiaries that are denominated in foreign currency are remeasured into U.S. dollars at period-end exchange rates. Non-monetary assets and liabilities that are denominated in the foreign currency are remeasured into U.S. dollars at the historical rates. Revenue and expenses that are denominated in the foreign currency are remeasured into U.S. dollars at the average exchange rates during the period. Remeasurement of foreign currency accounts and resulting foreign exchange transaction gains and losses, which have not been material, are reflected in the consolidated statements of operations in other expense, net. The functional currency of Super Micro Asia and Technology Park, Inc. is New Taiwanese Dollar (“NTD”). Assets and liabilities are translated to U.S. dollars at the period-end exchange rate. Revenues and expenses are translated using the average exchange rate for the period. The effects of foreign currency translation are included in stockholders’ equity as a component of accumulated other comprehensive (loss) income in the accompanying consolidated balance sheets and periodic movements are summarized as a line item in the consolidated statements of comprehensive income. The Company has an investment in a privately-held company that is accounted for under the equity method (the "Corporate Venture"). The functional currency of the Corporate Venture is the Chinese Yuan. Adjustments for the Company's share of the effects of foreign currency translation from local currency to U.S. dollars are recorded as increases or decreases to the carrying value of the investment and included in stockholders’ equity as a component of accumulated other comprehensive (loss) income in the accompanying consolidated balance sheets and periodic movements are summarized as a line item in the consolidated statements of comprehensive income.
Net Income Per Common Share	Net Income Per Common Share Basic net income per common share is computed by dividing net income by the weighted-average number of shares of common stock outstanding during the period. Diluted net income per common share is computed by dividing net income by the weighted-average number of shares of common stock outstanding during the period increased to include the number of additional shares of common stock that would have been outstanding if the potentially dilutive securities had been issued. Potentially dilutive securities include outstanding stock options and unvested RSUs and PRSUs. Contingently issuable shares are included in computing basic net income per common share as of the date that all necessary conditions, including service vesting conditions have been satisfied. Contingently issuable shares are considered for computing diluted net income per common share as of the beginning of the period in which all necessary conditions have been satisfied and the only remaining vesting condition is a service vesting condition. Under the treasury stock method, an increase in the fair market value of the Company's common stock results in a greater dilutive effect from outstanding stock options and RSUs and PRSUs. Additionally, the exercise of stock options and the vesting of RSUs results in a further dilutive effect on net income per share.
Concentration of Supplier and Credit Risk	Concentration of Supplier RiskCertain materials used by the Company in the manufacturing of its products are available from a limited number of suppliers. Shortages could occur in these materials due to an interruption of supply or increased demand in the industry.Concentration of Credit RiskFinancial instruments which potentially subject the Company to concentration of credit risk consist primarily of cash and cash equivalents, restricted cash, investment in an auction rate security and accounts receivable.
Treasury Stock	Treasury Stock The Company accounts for treasury stock under the cost method. Upon the retirement of treasury shares, the Company deducts the par value of the retired treasury shares from common stock and allocates the excess of cost over par as a deduction to additional paid-in capital based on the pro-rata portion of additional paid-in-capital, and the remaining excess as a deduction to retained earnings. Retired treasury shares revert to the status of authorized but unissued shares.
Accounting Pronouncements Recently Adopted and Not Yet Adopted	Accounting Pronouncements Recently Adopted In June 2016, the FASB issued authoritative guidance, Financial Instruments-Credit Losses: Measurement of Credit Losses on Financial Instruments . Under this new guidance, a company is required to estimate credit losses on certain types of financial instruments using an expected-loss model, replacing the current incurred-loss model, and record the estimate through an allowance for credit losses, which results in more timely recognition of credit losses. The Company adopted this guidance on July 1, 2020 using the modified retrospective transition method, which requires a cumulative-effect adjustment, if any, to the opening balance of retained earnings to be recognized on the date of adoption with prior periods not restated. The adoption of the guidance had no material impact on the Company’s consolidated financial statements as of July 1, 2020. The Company maintains an allowance for credit losses for accounts receivable and the investment in an auction rate security. The allowance for credit losses is estimated using a loss rate method, considering factors such as customers’ credit risk, historical loss experience, current conditions, and forecasts. The allowance for credit losses is measured on a collective (pool) basis by aggregating customer balances with similar risk characteristics. The Company also records a specific allowance based on an analysis of individual past due balances or customer-specific information, such as a decline in creditworthiness or bankruptcy. The new guidance has no material impact on the Company's consolidated financial statements for the year ended June 30, 2021. In August 2018, the FASB issued amended guidance, Fair Value Measurement: Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measuremen t, to modify the disclosure requirements on fair value measurements based on the concepts in the FASB Concepts Statements, including the consideration of costs and benefits. The Company adopted this guidance on July 1, 2020. As of June 30, 2021, the Company’s investment in an auction rate security is the only Level 3 investment measured at fair value on a recurring basis. Changes to the disclosures in the consolidated financial statements were immaterial. See Note 2, "Fair Value Disclosure". In August 2018, the FASB issued authoritative guidance, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract , to align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract as well as hosting arrangements that include an internal use software license with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The accounting for the service element of a hosting arrangement that is a service contract is not affected by the new guidance. The Company adopted this guidance on July 1, 2020, prospectively. The adoption of this guidance did not have a material impact on the Company's consolidated financial statements and disclosures. Accounting Pronouncements Not Yet Adopted In December 2019, the FASB issued amended guidance, Simplifying the Accounting for Income Taxes , to remove certain exceptions to the general principles from ASC 740 - Income Taxes , and to improve consistent application of U.S. GAAP for other areas of ASC 740 by clarifying and amending existing guidance. The guidance is effective for the Company from July 1, 2021; early adoption is permitted. The Company determined that the adoption of the guidance will not have a material impact on the Company's consolidated financial statements and disclosures. In March 2020, the FASB issued authoritative guidance, Facilitation of the Effects of Reference Rate Reform on Financial Reporting . The new guidance provides optional expedients and exceptions for applying generally accepted accounting principles to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another reference rate expected to be discontinued. The guidance also establishes (1) a general contract modification principle that entities can apply in other areas that may be affected by reference rate reform and (2) certain elective hedge accounting expedients. The amendment is effective for all entities through December 31, 2022. In January 2021, the FASB issued further guidance on this topic, which clarified the scope and application of the original guidance. LIBOR is used to calculate the interest on borrowings under the Company's 2018 Bank of America Credit Facility and E.SUN Credit Facility. The 2018 Bank of America Credit Facility was amended on June 28, 2021 with a new maturity date of June 28, 2026 and fallback terms related to LIBOR replacement mechanics. As the amendment has changes not related to LIBOR replacement, optional expedients under this guidance cannot be elected. E.SUN Credit Facility will terminate on September 18, 2021 before the phase out of LIBOR. Therefore, the Company does not expect the adoption of the guidance to have an impact on its consolidated financial statements and disclosures.

Organization and Summary of S_3

Organization and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Property, Plant and Equipment, Estimated Useful Lives	Property, plant and equipment is recorded at cost and depreciated using the straight-line method over the estimated useful lives of the related assets as follows: Software 3 to 5 years Machinery and equipment 3 to 7 years Furniture and fixtures 5 years Buildings 39 years Building improvements Up to 20 years Land improvements 15 years Leasehold improvements Shorter of lease term or estimated useful life
Reconciliation of the Changes in Accrued Warranty Costs	The following table presents for the fiscal years ended June 30, 2021, 2020 and 2019, the reconciliation of the changes in accrued warranty costs which is included as a component of accrued liabilities and other long-term liabilities (in thousands): Years Ended June 30, 2021 2020 2019 Balance, beginning of the year $ 12,379 $ 11,034 $ 9,884 Provision for warranty 29,638 35,962 22,991 Costs utilized (30,575) (34,502) (26,281) Change in estimated liability for pre-existing warranties 1,421 (115) 4,440 Balance, end of the year $ 12,863 $ 12,379 $ 11,034 Current portion 10,185 9,984 8,661 Non-current portion $ 2,678 $ 2,395 $ 2,373
Computation of Basic and Diluted Net Income Per Common Share	The computation of basic and diluted net income per common share is as follows (in thousands, except per share amounts): Years Ended June 30, 2021 2020 2019 Numerator: Net income $ 111,865 $ 84,308 $ 71,918 Denominator: Weighted-average shares outstanding 51,157 50,987 49,917 Effect of dilutive securities 2,350 1,851 1,799 Weighted-average diluted shares 53,507 52,838 51,716 Basic net income per common share $ 2.19 $ 1.65 $ 1.44 Diluted net income per common share $ 2.09 $ 1.60 $ 1.39

Fair Value Disclosure (Tables)

Fair Value Disclosure (Tables)	12 Months Ended
	Jun. 30, 2021
Fair Value Disclosures [Abstract]
Schedule of Cash Equivalents and Long-term Investments Measured at Fair Value on a Recurring Basis	The following table sets forth the Company’s financial instruments as of June 30, 2021 and 2020, which are measured at fair value on a recurring basis by level within the fair value hierarchy. These are classified based on the lowest level of input that is significant to the fair value measurement (in thousands): June 30, 2021 Level 1 Level 2 Level 3 Asset at Assets Money market funds (1) $ 151 $ — $ — $ 151 Certificates of deposit (2) — 863 — 863 Auction rate security — — 1,556 1,556 Total assets measured at fair value $ 151 $ 863 $ 1,556 $ 2,570 June 30, 2020 Level 1 Level 2 Level 3 Asset at Assets Money market funds (1) $ 1,163 $ — $ — $ 1,163 Certificates of deposit (2) — 836 — 836 Auction rate security — — 1,571 1,571 Total assets measured at fair value $ 1,163 $ 836 $ 1,571 $ 3,570 Liabilities Performance awards liability (3) $ — $ 2,100 $ — $ 2,100 Total liabilities measured at fair value $ — $ 2,100 $ — $ 2,100 __________________________ (1) $0.0 million and $0.4 million in money market funds are included in cash and cash equivalents and $0.2 million and $0.8 million in money market funds are included in restricted cash, non-current in other assets in the consolidated balance sheets as of June 30, 2021 and 2020, respectively. (2) $0.2 million and $0.2 million in certificates of deposit are included in cash and cash equivalents, $0.3 million and $0.3 million in certificates of deposit are included in prepaid expenses and other assets, and $0.4 million and $0.3 million in certificates of deposit are included in restricted cash, non-current in other assets in the consolidated balance sheets as of June 30, 2021 and 2020, respectively. (3) As of June 30, 2021, the Company no longer measures performance awards liability at fair value because the Company trued up the performance awards liability to the cash payment value. As of June 30, 2020, the current portion of the performance awards liability of $1.5 million is included in accrued liabilities and the noncurrent portion of $0.6 million is included in other long-term liabilities in the consolidated balance sheets.
Summary of Fair Value Significant Inputs	The significant inputs used in estimating the fair value of the awards as of June 30, 2020 are as follows: Stock Price as of Period End Performance Period Risk-free Rate Volatility Dividend Yield $28.39 1.25 - 2.00 years 0.16% 53.75% —
Summary of Long-term Investments	The following is a summary of the Company’s investment in an auction rate security as of June 30, 2021 and 2020 (in thousands): June 30, 2021 Cost Basis Gross Gross Fair Value Auction rate security $ 1,750 $ — $ (194) $ 1,556 June 30, 2020 Cost Basis Gross Gross Fair Value Auction rate security $ 1,750 $ — $ (179) $ 1,571

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Jun. 30, 2021
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following is a summary of net sales by product type (in thousands): Years Ended June 30, 2021 2020 2019 Server and storage systems $ 2,790,305 $ 2,620,754 $ 2,858,644 Subsystems and accessories 767,117 718,527 641,716 Total $ 3,557,422 $ 3,339,281 $ 3,500,360 Years Ended June 30, 2021 2020 2019 United States $ 2,107,910 $ 1,957,329 $ 2,032,948 Asia 699,653 650,652 712,211 Europe 614,826 598,558 611,014 Other 135,033 132,742 144,187 Total $ 3,557,422 $ 3,339,281 $ 3,500,360

Accounts Receivable Allowances

Accounts Receivable Allowances (Tables)	12 Months Ended
	Jun. 30, 2021
Receivables [Abstract]
Reconciliation of Accounts Receivable Allowances	Accounts receivable allowances as of June 30, 2021, 2020 and 2019 consisted of the following (in thousands): Beginning Charged to Write-offs Ending Allowance for doubtful accounts: Year ended June 30, 2021 $ 4,586 $ (820) $ (1,175) $ 2,591 Year ended June 30, 2020 8,906 (3,081) (1,239) 4,586 Year ended June 30, 2019 1,945 7,058 (97) 8,906

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Jun. 30, 2021
Inventory Disclosure [Abstract]
Schedule of Inventories	Inventories as of June 30, 2021 and 2020 consisted of the following (in thousands): June 30, 2021 2020 Finished goods $ 761,694 $ 656,817 Work in process 80,472 38,146 Purchased parts and raw materials 198,798 156,535 Total inventories $ 1,040,964 $ 851,498

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Jun. 30, 2021
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant and Equipment	Property, plant and equipment as of June 30, 2021 and 2020 consisted of the following (in thousands): June 30, 2021 2020 Buildings $ 86,930 $ 86,930 Land 76,421 75,251 Machinery and equipment 97,671 85,381 Buildings construction in progress (1) 87,438 46,311 Building and leasehold improvements 26,640 24,517 Software 22,592 20,597 Furniture and fixtures 22,843 21,544 420,535 360,531 Accumulated depreciation and amortization (145,822) (126,746) Property, plant and equipment, net $ 274,713 $ 233,785 __________________________ (1) Primarily relates to the development and construction costs associated with the Company’s Green Computing Park located in San Jose, California and a new building in Taiwan.

Prepaid Expenses and Other As_2

Prepaid Expenses and Other Assets (Tables)	12 Months Ended
	Jun. 30, 2021
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Schedule of Prepaid Expenses and Other Current Assets	Prepaid expenses and other current assets as of June 30, 2021 and 2020 consisted of the following (in thousands): June 30, 2021 2020 Other receivables (1) $ 99,921 $ 96,669 Prepaid income tax 12,288 14,323 Prepaid expenses 6,719 7,075 Deferred service costs 4,900 4,161 Restricted cash 251 250 Others 6,116 4,507 Total prepaid expenses and other current assets $ 130,195 $ 126,985 __________________________
Schedule of Other Long-term Assets	Other assets as of June 30, 2021 and 2020 consisted of the following (in thousands): June 30, 2021 2020 Operating lease right-of-use asset $ 20,047 $ 23,784 Deferred service costs, non-current 5,421 4,632 Deposits 1,669 1,201 Prepaid expense, non-current 1,973 1,576 Investment in auction rate security 1,556 1,571 Restricted cash, non-current 932 1,607 Others 528 128 Total other assets $ 32,126 $ 34,499
Schedule of Cash, Cash Equivalents, and Restricted Cash	Cash, cash equivalents and restricted cash as of June 30, 2021 and 2020 consisted of the following (in thousands): June 30, 2021 2020 Cash and cash equivalents $ 232,266 $ 210,533 Restricted cash included in prepaid expenses and other current assets 251 250 Restricted cash included in other assets 932 1,607 Total cash, cash equivalents and restricted cash $ 233,449 $ 212,390

Accrued Liabilities (Tables)

Accrued Liabilities (Tables)	12 Months Ended
	Jun. 30, 2021
Payables and Accruals [Abstract]
Schedule of accrued liabilities	Accrued liabilities as of June 30, 2021 and 2020 consisted of the following (in thousands): June 30, 2021 2020 Accrued payroll and related expenses $ 45,770 $ 33,577 Contract manufacturers liabilities 45,319 36,249 Customer deposits 32,419 9,942 Accrued warranty costs 10,185 9,984 Operating lease liability 6,322 6,310 Accrued cooperative marketing expenses 5,652 5,925 Accrued professional fees 2,737 5,661 Accrued legal liabilities — 18,114 Others 30,446 29,639 Total accrued liabilities $ 178,850 $ 155,401

Short-term and Long-term Debt (

Short-term and Long-term Debt (Tables)	12 Months Ended
	Jun. 30, 2021
Debt Disclosure [Abstract]
Schedule of Short-term and Long-term Debt Obligations	Short-term and long-term debt obligations as of June 30, 2021 and 2020 consisted of the following (in thousands): June 30, 2021 2020 Line of credit: CTBC Bank $ 18,000 $ — E.SUN Bank 20,400 — Total line of credit 38,400 — Term loans: CTBC Bank, due August 31, 2021 25,090 23,704 CTBC Bank, due June 4, 2030 34,700 5,697 Total term loans 59,790 29,401 Total debt 98,190 29,401 Short-term debt and current portion of long-term debt 63,490 23,704 Debt, Non-current $ 34,700 $ 5,697
Schedule of Maturities of Short-term and Long-term Debt Obligations	Principal payments on short-term and long-term debt obligations are due as follows (in thousands): Fiscal Year: Principal Payments 2022 $ 63,490 2023 413 2024 4,957 2025 4,957 2026 4,957 2027 and thereafter 19,416 Total short-term and long-term debt $ 98,190

Other Long-term Liabilities (Ta

Other Long-term Liabilities (Tables)	12 Months Ended
	Jun. 30, 2021
Other Liabilities Disclosure [Abstract]
Schedule of Other Long-term Liabilities	Other long-term liabilities as of June 30, 2021 and 2020 consisted of the following (in thousands): June 30, 2021 2020 Accrued unrecognized tax benefits including related interest and penalties $ 17,841 $ 15,496 Operating lease liability, non-current 14,539 18,102 Accrued warranty costs, non-current 2,678 2,395 Others 6,074 6,002 Total other long-term liabilities $ 41,132 $ 41,995

Leases (Tables)

Leases (Tables)	12 Months Ended
	Jun. 30, 2021
Leases [Abstract]
Summary of Operating Lease Expense Recognized and Supplemental Cash Flow Information	Operating lease expense recognized and supplemental cash flow information related to operating leases for the years ended June 30, 2021 and 2020 were as follows (in thousands): Years Ended June 30, 2021 2020 Operating lease expense (including expense for lease agreements with related parties of $1,319 and $1,421 for the years ended June 30, 2021 and 2020, respectively) $ 7,827 $ 6,993 Cash payments for operating leases (including payments to related parties of $1,351 and $1,443 for the years ended June 30, 2021 and 2020, respectively) 7,966 6,411 New operating lease assets obtained in exchange for operating lease liabilities 3,538 15,229
Summary of Maturities of Operating Lease Liabilities Under Noncancelable Operating Lease Arrangements	Maturities of operating lease liabilities under noncancelable operating lease arrangements as of June 30, 2021 were as follows (in thousands): Fiscal Year: Maturities of operating leases 2022 $ 6,932 2023 5,430 2024 4,538 2025 4,382 2026 and beyond 1,017 Total future lease payments $ 22,299 Less: Imputed interest (1,438) Present value of operating lease liabilities $ 20,861

Related Party Transactions (Tab

Related Party Transactions (Tables)	12 Months Ended
	Jun. 30, 2021
Related Party Transactions [Abstract]
Schedule of Related Party Transactions	The Company’s results from transactions with Ablecom and Compuware for each of the fiscal years ended June 30, 2021, 2020 and 2019 are as follows (in thousands): Years Ended June 30, 2021 2020 2019 Ablecom Purchases (1) $ 130,852 $ 160,084 $ 145,273 Compuware Net sales $ 27,865 $ 23,867 $ 17,651 Purchases (1) 115,213 131,763 139,579 __________________________ (1) Includes principally purchases of inventory and other miscellaneous items. The Company's net sales to Ablecom were not material for the fiscal years ended June 30, 2021, 2020 and 2019. The Company had the following balances related to transactions with Ablecom and Compuware as of June 30, 2021 and 2020 (in thousands): June 30, 2021 2020 Ablecom Accounts receivable and other receivables (1) $ 5,577 $ 6,379 Accounts payable and accrued liabilities (2) 41,194 40,056 Other long-term liabilities (3) — 513 Compuware Accounts receivable and other receivables (1) 18,371 14,323 Accounts payable and accrued liabilities (2) 46,430 46,518 Other long-term liabilities (3) — 186 __________________________ (1) Other receivables include receivables from vendors included in prepaid and other current assets. (2) Includes current portion of operating lease liabilities included in other current liabilities. (3) Represents non-current portion of operating lease liabilities.

Stock-based Compensation and _2

Stock-based Compensation and Stockholders' Equity (Tables)	12 Months Ended
	Jun. 30, 2021
Share-based Payment Arrangement [Abstract]
Schedule of Assumptions Used to Estimate Fair Value of Stock Options Granted Using Black-Scholes Option Pricing Model	The fair value of stock option grants for the fiscal years ended June 30, 2021, 2020 and 2019 was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions: Years Ended June 30, 2021 2020 2019 Risk-free interest rate 0.27% - 1.09% 0.47% - 1.72% 2.32% - 2.97% Expected term 5.98 years 6.27 years 6.05 years Dividend yield — % — % — % Volatility 50.03% - 50.43% 49.61% - 50.46% 47.34% - 50.28% Weighted-average fair value $ 14.92 $ 9.59 $ 9.25
Schedule of Stock-based Compensation Expense	The following table shows total stock-based compensation expense included in the consolidated statements of operations for the fiscal years ended June 30, 2021, 2020 and 2019 (in thousands): Years Ended June 30, 2021 2020 2019 Cost of sales $ 1,762 $ 1,504 $ 1,663 Research and development 14,030 12,202 12,981 Sales and marketing 2,022 1,680 1,805 General and administrative 10,735 4,803 4,735 Stock-based compensation expense before taxes 28,549 20,189 21,184 Income tax impact (8,574) (6,814) (4,349) Stock-based compensation expense, net $ 19,975 $ 13,375 $ 16,835
Summary of Operational and Stock Price Milestones	The achievement status of the operational and stock price milestones as of June 30, 2021 was as follows: Annualized Revenue Milestone Achievement Status Stock Price Milestone Achievement Status (in billions) $4.0 Probable $45 Not met $4.8 Probable $60 Not met $5.8 Probable $75 Not met $6.8 Probable $95 Not met $8.0 — $120 Not met
Summary of Stock Option Activity	The following table summarizes stock option activity during the fiscal years ended June 30, 2021, 2020 and 2019 under all plans: Options Weighted Weighted Aggregate Balance as of June 30, 2018 8,301,138 $ 16.50 Granted 434,320 $ 18.58 Forfeited/Cancelled (1,360,823) $ 8.94 Balance as of June 30, 2019 7,374,635 $ 18.02 Granted 273,260 $ 19.61 Exercised (1,812,000) $ 15.74 Forfeited/Cancelled (456,127) $ 11.97 Balance as of June 30, 2020 5,379,768 $ 19.38 Granted 1,517,110 $ 40.49 Exercised (1,645,800) $ 17.25 Forfeited/Cancelled (75,524) $ 24.43 Balance as of June 30, 2021 5,175,554 $ 26.17 5.36 $ 57,099 Options vested and exercisable at June 30, 2021 3,448,888 $ 20.47 3.41 $ 50,887
Schedule of Significant Ranges of Outstanding and Exercisable Stock Options	Additional information regarding options outstanding as of June 30, 2021, is as follows: Options Outstanding Options Vested and Exercisable Range of Number Weighted- Weighted- Number Weighted- $9.24 - $12.50 521,886 1.54 $ 10.81 521,886 $ 10.81 $13.00 - $15.22 540,699 2.68 $ 14.33 490,794 $ 14.40 $17.09 - $18.93 714,906 3.17 $ 17.94 648,411 $ 17.97 $20.37 - $22.10 619,745 4.90 $ 21.13 547,375 $ 21.10 $22.15 - $25.44 614,906 5.81 $ 24.26 436,968 $ 24.67 $26.60 - $28.71 536,681 4.69 $ 27.08 529,181 $ 27.06 $30.33 - $38.50 590,341 7.26 $ 34.31 246,273 $ 34.48 $39.19 - $39.19 28,000 3.62 $ 39.19 28,000 $ 39.19 $42.35 - $42.35 8,390 4.82 $ 42.35 — $ — $45.00 - $45.00 1,000,000 9.67 $ 45.00 — $ — $9.24 - $45.00 5,175,554 5.36 $ 26.17 3,448,888 $ 20.47
Summary of Restricted Stock Unit Activity	The following table summarizes RSUs and PRSUs activity during the fiscal years ended June 30, 2021 and 2020 under all plans: Time-based RSUs Outstanding Weighted PRSUs Outstanding Weighted Balance as of June 30, 2018 1,480,605 $ 23.34 120,000 $ 27.10 Granted 1,086,911 $ 18.37 — Released (1) (549,886) $ 24.87 — Forfeited (144,528) $ 20.25 — Balance as of June 30, 2019 1,873,102 $ 20.25 120,000 $ 27.10 Granted 943,650 $ 20.45 30,000 $ 20.37 Released (1) (871,274) $ 20.97 (108,000) $ 27.10 Forfeited (177,451) $ 19.49 — Balance as of June 30, 2020 1,768,027 $ 20.08 42,000 $ 22.29 Granted 1,334,418 $ 31.54 30,000 $ 34.27 Released (1) (984,406) $ 21.63 (27,000) $ 23.36 Forfeited (263,083) $ 25.01 (30,000) $ 20.37 Balance as of June 30, 2021 1,854,956 $ 26.79 15,000 $ 34.27 _________________ (1) The number of shares released excludes 172,857 RSUs that were vested but not released in fiscal year 2019. The number of vested but not released RSUs for fiscal years 2021 and 2020 was not material. The number of shares released also excludes 24,000 PRSUs that were vested but not released in fiscal year 2019. These vested RSUs and PRSUs were primarily released in fiscal year 2020 and included in fiscal year 2020 number upon the effectiveness of the Company's registration statement on Form S-8.

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Schedule of Domestic and Foreign Components of Income Before Income Tax Provision	The components of income before income tax provision for the fiscal years ended June 30, 2021, 2020 and 2019 are as follows (in thousands): Years Ended June 30, 2021 2020 2019 United States $ 80,922 $ 35,701 $ 45,126 Foreign 37,706 49,127 44,397 Income before income tax provision $ 118,628 $ 84,828 $ 89,523
Schedule of Income Tax Provision	The income tax provision for the fiscal years ended June 30, 2021, 2020 and 2019, consists of the following (in thousands): Years Ended June 30, 2021 2020 2019 Current: Federal $ 3,406 $ 4,568 $ 12,308 State 1,077 1,727 2,917 Foreign 10,843 10,399 16,531 15,326 16,694 31,756 Deferred: Federal (5,489) (10,108) (13,078) State (409) (1,621) (2,888) Foreign (2,492) (2,043) (906) (8,390) (13,772) (16,872) Income tax provision $ 6,936 $ 2,922 $ 14,884
Schedule of Deferred Tax Assets and Liabilities	The Company’s net deferred tax assets as of June 30, 2021 and 2020 consist of the following (in thousands): June 30, 2021 2020 Research and development credits $ 30,540 $ 24,304 Deferred revenue 18,584 20,354 Inventory valuation 13,831 13,946 Capitalized research and development costs 15,206 7,509 Stock-based compensation 3,868 4,075 Lease obligations 2,861 3,632 Accrued vacation and bonus 5,098 3,281 Prepaid and accrued expenses 1,179 2,560 Warranty accrual 2,154 2,051 Bad debt and other reserves 1,668 1,917 Marketing fund accrual 720 548 Other 4,460 3,652 Total deferred income tax assets 100,169 87,829 Deferred tax liabilities-depreciation and other (4,137) (4,428) Right of use asset (2,831) (3,612) Valuation allowance (29,913) (24,891) Deferred income tax assets, net $ 63,288 $ 54,898
Reconciliation of Effective Income Tax Rate	The following is a reconciliation for the fiscal years ended June 30, 2021, 2020 and 2019, of the statutory rate to the Company’s effective federal tax rate: Years Ended June 30, 2021 2020 2019 Income tax provision at statutory rate 21.0 % 21.0 % 21.0 % State income tax, net of federal tax benefit 0.3 — 0.5 Foreign rate differential (0.5) — 1.1 Research and development tax credit (10.5) (13.1) (9.5) Uncertain tax positions, net of (settlement) with Tax Authorities 2.0 (2.3) 4.1 Foreign derived intangible / Subpart F income inclusion (2.5) (3.8) (2.1) Stock-based compensation (3.3) (2.8) 2.1 Non deductible penalty on SEC matter — 4.4 — Provision to return true-up (1.9) (1.1) (1.6) Other, net 1.2 1.1 1.0 Effective tax rate 5.8 % 3.4 % 16.6 %
Schedule of Unrecognized Tax Benefits Rollforward	The following table summarizes the activity related to the unrecognized tax benefits (in thousands): Gross* Balance at June 30, 2018 $ 25,117 Gross increases: For current year’s tax positions 7,789 For prior years’ tax positions — Gross decreases: Decreases due to settlements with taxing authority (1,504) Decreases due to lapse of statute of limitations (3,354) Balance at June 30, 2019 28,048 Gross increases: For current year’s tax positions 8,769 For prior years’ tax positions 505 Gross decreases: Decreases due to settlements with taxing authority (7,632) Decreases due to lapse of statute of limitations (2,484) Balance at June 30, 2020 27,206 Gross increases: For current year’s tax positions 13,333 For prior years’ tax positions 1,439 Gross decreases: Decreases due to lapse of statute of limitations (1,243) Balance at June 30, 2021 $ 40,735 ________________________

Segment Reporting (Tables)

Segment Reporting (Tables)	12 Months Ended
	Jun. 30, 2021
Segment Reporting [Abstract]
Summary of Property, Plant and Equipment	The following is a summary of property, plant and equipment, net (in thousands): June 30, 2021 2020 Long-lived assets: United States $ 180,143 $ 178,812 Asia 91,640 51,605 Europe 2,930 3,368 $ 274,713 $ 233,785

Organization and Summary of S_4

Organization and Summary of Significant Accounting Policies - Property, Plant and Equipment Table (Details)	12 Months Ended
	Jun. 30, 2021
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Buildings
Property, Plant and Equipment [Line Items]
Estimated useful life	39 years
Building improvements
Property, Plant and Equipment [Line Items]
Estimated useful life	20 years
Land improvements
Property, Plant and Equipment [Line Items]
Estimated useful life	15 years
Minimum | Software
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Minimum | Machinery and equipment
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Maximum | Software
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Maximum | Machinery and equipment
Property, Plant and Equipment [Line Items]
Estimated useful life	7 years

Organization and Summary of S_5

Organization and Summary of Significant Accounting Policies - Long-Lived Assets (Details) - USD ($)	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Impairment of long-lived assets held-for-use	$ 0	$ 0	$ 0

Organization and Summary of S_6

Organization and Summary of Significant Accounting Policies - Allowances for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
(Recoveries of) Allowance for doubtful accounts	$ (820)	$ (3,081)	$ 7,058

Organization and Summary of S_7

Organization and Summary of Significant Accounting Policies - Product Warranties (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Product Warranties:
Balance, beginning of the year	$ 12,379	$ 11,034	$ 9,884
Provision for warranty	29,638	35,962	22,991
Costs utilized	(30,575)	(34,502)	(26,281)
Change in estimated liability for pre-existing warranties	1,421	(115)	4,440
Balance, end of the year	12,863	12,379	11,034
Current portion	10,185	9,984	8,661
Non-current portion	$ 2,678	$ 2,395	$ 2,373
Minimum
Product Warranty [Line Items]
Product warranty period	15 months
Maximum
Product Warranty [Line Items]
Product warranty period	39 months

Organization and Summary of S_8

Organization and Summary of Significant Accounting Policies - Research and Development (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Reduction of research and development expenses	$ 10.9	$ 2.1	$ 2.8
Cancellation fee, net, received from canceled joint venture reducing research and development expense		$ 9.5

Organization and Summary of S_9

Organization and Summary of Significant Accounting Policies - Advertising Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Advertising costs	$ 4.1	$ 3	$ 2.4

Organization and Summary of _10

Organization and Summary of Significant Accounting Policies - Variable Interest Entities (Details) - Super Micro Asia Science and Technology Park, Inc. - Variable Interest Entity, primary beneficiary $ in Millions	12 Months Ended
	Jun. 30, 2012USD ($)
Variable Interest Entity [Line Items]
Variable Interest Entity contribution	$ 0.2
Variable Interest Entity, ownership percentage	50.00%

Organization and Summary of _11

Organization and Summary of Significant Accounting Policies - Net Income Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Numerator:
Net income	$ 111,865	$ 84,308	$ 71,918
Denominator:
Weighted-average shares outstanding (in shares)	51,157,000	50,987,000	49,917,000
Effect of dilutive securities (in shares)	2,350,000	1,851,000	1,799,000
Weighted-average diluted shares (in shares)	53,507,000	52,838,000	51,716,000
Basic net income per common share (in dollars per share)	$ 2.19	$ 1.65	$ 1.44
Diluted net income per common share (in dollars per share)	$ 2.09	$ 1.60	$ 1.39
Employee stock options and restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive outstanding equity awards (in shares)	670,179	2,208,000	3,758,000

Organization and Summary of _12

Organization and Summary of Significant Accounting Policies - Concentration of Risk (Details)	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Total purchases | Supplier Concentration Risk | One Supplier
Concentration Risk [Line Items]
Concentration risk percentage	20.30%	26.80%	21.80%
Cost of sales | Supplier Concentration Risk | Affiliated | Ablecom and Compuware
Concentration Risk [Line Items]
Concentration risk percentage	7.80%	10.10%	9.20%
Accounts receivable | Customer concentration risk | One Customer
Concentration Risk [Line Items]
Concentration risk percentage	13.50%	10.10%

Fair Value Disclosure - Assets

Fair Value Disclosure - Assets and Liabilities at Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accrued liabilities, current	$ 178,850	$ 155,401
Other long-term liabilities	41,132	41,995
Auction Rate Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Auction rate security	1,556	1,571
Share-based Payment Arrangement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accrued liabilities, current	1,500
Other long-term liabilities	600
Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash	0	400
Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash	200	200
Prepaid expense and other assets	300	300
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	2,570	3,570
Performance awards liability		2,100
Total liabilities measured at fair value		2,100
Fair Value, Measurements, Recurring | Auction Rate Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Auction rate security	1,556	1,571
Fair Value, Measurements, Recurring | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash	151	1,163
Fair Value, Measurements, Recurring | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash	863	836
Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	151	1,163
Performance awards liability		0
Total liabilities measured at fair value		0
Fair Value, Measurements, Recurring | Level 1 | Auction Rate Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Auction rate security	0	0
Fair Value, Measurements, Recurring | Level 1 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash	151	1,163
Fair Value, Measurements, Recurring | Level 1 | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash	0	0
Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	863	836
Performance awards liability		2,100
Total liabilities measured at fair value		2,100
Fair Value, Measurements, Recurring | Level 2 | Auction Rate Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Auction rate security	0	0
Fair Value, Measurements, Recurring | Level 2 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash	0	0
Fair Value, Measurements, Recurring | Level 2 | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash	863	836
Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	1,556	1,571
Performance awards liability		0
Total liabilities measured at fair value		0
Fair Value, Measurements, Recurring | Level 3 | Auction Rate Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Auction rate security	1,556	1,571
Fair Value, Measurements, Recurring | Level 3 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash	0	0
Fair Value, Measurements, Recurring | Level 3 | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash	$ 0	$ 0

Fair Value Disclosure - Signifi

Fair Value Disclosure - Significant Inputs (Details) - Performance Awards	12 Months Ended
	Jun. 30, 2021$ / shares
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stock Price as of Period End (in dollars per share)	$ 28.39
Risk-free interest rate	0.16%
Volatility	53.75%
Dividend yield	0.00%
Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Performance Period	1 year 3 months
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Performance Period	2 years

Fair Value Disclosure - Long-te

Fair Value Disclosure - Long-term Investments (Details) - Auction Rate Securities - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost Basis	$ 1,750	$ 1,750
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	(194)	(179)
Fair Value	$ 1,556	$ 1,571

Fair Value Disclosure - Narrati

Fair Value Disclosure - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities without readily determinable fair value, amount	$ 100
Impairment of investments	0	$ 0	$ 2,661
Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of outstanding debt	$ 98,200	$ 29,400
Fair Value, Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities without readily determinable fair value, amount, initial cost basis			$ 2,700

Revenue - Summary of Net Sales

Revenue - Summary of Net Sales by Product Type (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 3,557,422	$ 3,339,281	$ 3,500,360
Server and storage systems
Disaggregation of Revenue [Line Items]
Net sales	2,790,305	2,620,754	2,858,644
Subsystems and accessories
Disaggregation of Revenue [Line Items]
Net sales	$ 767,117	$ 718,527	$ 641,716

Revenue - Summary of Net Sale_2

Revenue - Summary of Net Sales by Location (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 3,557,422	$ 3,339,281	$ 3,500,360
United States
Disaggregation of Revenue [Line Items]
Net sales	2,107,910	1,957,329	2,032,948
Asia
Disaggregation of Revenue [Line Items]
Net sales	699,653	650,652	712,211
Europe
Disaggregation of Revenue [Line Items]
Net sales	614,826	598,558	611,014
Other
Disaggregation of Revenue [Line Items]
Net sales	$ 135,033	$ 132,742	$ 144,187

Revenue - Narrative (Details)

Revenue - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Revenue from Contract with Customer [Abstract]
Deferred revenue		$ 203.8
Contract with customer liability, revenue recognized in the period	$ 101.6
Decrease in deferred revenue	$ 1.5

Revenue - Performance Obligatio

Revenue - Performance Obligation (Details) $ in Millions	Jun. 30, 2021USD ($)
Revenue from Contract with Customer [Abstract]
Remaining revenue performance obligation, amount	$ 202.3
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining revenue performance obligation, percent to be recognized	50.00%
Remaining performance obligation, expected timing of satisfaction, period	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, expected timing of satisfaction, period

Accounts Receivable Allowance_2

Accounts Receivable Allowances - Schedule of Accounts Receivable Allowance (Details) - Allowance for doubtful accounts - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Movement in Valuation Allowances and Reserves
Beginning Balance	$ 4,586	$ 8,906	$ 1,945
Charged to Cost and Expenses (Recovered), net	(820)	(3,081)	7,058
Write-offs	(1,175)	(1,239)	(97)
Ending Balance	$ 2,591	$ 4,586	$ 8,906

Inventories - Schedule of Inven

Inventories - Schedule of Inventory (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Inventory, Net, Items Net of Reserve Alternative [Abstract]
Finished goods	$ 761,694	$ 656,817
Work in process	80,472	38,146
Purchased parts and raw materials	198,798	156,535
Total inventories	$ 1,040,964	$ 851,498

Inventories - Narrative (Detail

Inventories - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Inventory Disclosure [Abstract]
Provision for excess and obsolete inventories	$ 6,805	$ 18,373	$ 32,946

Property, Plant and Equipment -

Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 420,535	$ 360,531
Accumulated depreciation and amortization	(145,822)	(126,746)
Property, plant and equipment, net	274,713	233,785
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	86,930	86,930
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	76,421	75,251
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	97,671	85,381
Buildings construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	87,438	46,311
Building and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	26,640	24,517
Software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	22,592	20,597
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 22,843	$ 21,544

Prepaid Expenses and Other As_3

Prepaid Expenses and Other Assets - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Prepaid Expense and Other Assets, Current [Abstract]
Other receivables	$ 99,921	$ 96,669
Prepaid income tax	12,288	14,323
Prepaid expenses	6,719	7,075
Deferred service costs	4,900	4,161
Restricted cash	251	250
Others	6,116	4,507
Total prepaid expenses and other current assets	130,195	126,985
Receivables from contract manufacturers, buy-sell arrangement	$ 76,200	$ 83,800

Prepaid Expenses and Other As_4

Prepaid Expenses and Other Assets - Schedule of Other Long Term Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Operating lease right-of-use asset	$ 20,047	$ 23,784
Deferred service costs, non-current	5,421	4,632
Deposits	1,669	1,201
Prepaid expense, non-current	1,973	1,576
Investment in auction rate security	1,556	1,571
Restricted cash, non-current	932	1,607
Others	528	128
Total other assets	$ 32,126	$ 34,499

Prepaid Expenses and Other As_5

Prepaid Expenses and Other Assets - Schedule of Cash and Restricted Cash (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Cash and cash equivalents	$ 232,266	$ 210,533
Restricted cash included in prepaid expenses and other current assets	251	250
Restricted cash included in other assets	932	1,607
Total cash, cash equivalents and restricted cash	$ 233,449	$ 212,390	$ 262,140	$ 120,382

Investment in a Corporate Ven_2

Investment in a Corporate Venture - Narrative (Details) - USD ($)	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2017
Schedule of Equity Method Investments [Line Items]
Cost of sales	$ 3,022,884,000	$ 2,813,071,000	$ 3,004,838,000
Corporate Venture
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage				30.00%
Impairment of investments	0	0
Cost of sales	51,200,000	61,900,000	$ 52,200,000
Accounts receivable	8,500,000	7,800,000
Accrued Liabilities | Corporate Venture
Schedule of Equity Method Investments [Line Items]
Unamortized deferred gain	1,000,000	2,000,000
Long-Term Liabilities | Corporate Venture
Schedule of Equity Method Investments [Line Items]
Unamortized deferred gain	$ 0	$ 1,000,000
Investor In China | Corporate Venture
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage				70.00%

Accrued Liabilities - Schedule

Accrued Liabilities - Schedule of Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Payables and Accruals [Abstract]
Accrued payroll and related expenses	$ 45,770	$ 33,577
Contract manufacturers liabilities	45,319	36,249
Customer deposits	32,419	9,942
Accrued warranty costs	10,185	9,984	$ 8,661
Operating lease liability	6,322	6,310
Accrued cooperative marketing expenses	5,652	5,925
Accrued professional fees	2,737	5,661
Accrued legal liabilities	0	18,114
Others	30,446	29,639
Total accrued liabilities	$ 178,850	$ 155,401
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Total accrued liabilities	Total accrued liabilities

Accrued Liabilities - Narrative

Accrued Liabilities - Narrative (Details) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended
	Mar. 31, 2020USD ($)daytrancheboardMember$ / shares	Jun. 30, 2021USD ($)boardMember	Jun. 30, 2020USD ($)
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Number of board members, performance awards | boardMember	2	2
Accrued bonuses		$ 3.6	$ 2.1
Unrecognized bonus compensation expense		$ 0.5
Unrecognized bonus compensation expense, period		2 months 4 days
Bonus compensation expense		$ 5.8	2.1
Accrued Liabilities
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Accrued bonuses		3.6	1.5
Other Noncurrent Liabilities
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Accrued bonuses		$ 0	$ 0.6
Chief Executive Officer
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Performance bonuses approved	$ 8.1
Performance bonus, number of tranches | tranche	2
Percent of bonus subject to performance condition	50.00%
Stock price threshold to earn bonus, tranche one (in dollars per share) | $ / shares	$ 31.61
Performance bonus, stock price, threshold consecutive trading days | day	20
Performance bonus, percent of amount, tranche two	50.00%
Stock price threshold to earn bonus, tranche two (in dollars per share) | $ / shares	$ 32.99
Senior Executive
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Performance bonuses approved	$ 0.1
Two Board Of Director Members
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Performance bonuses approved	$ 0.3
Performance bonus, number of tranches | tranche	2
Stock price threshold to earn bonus, tranche one (in dollars per share) | $ / shares	$ 31.61
Stock price threshold to earn bonus, tranche two (in dollars per share) | $ / shares	$ 32.99

Short-term and Long-term Debt -

Short-term and Long-term Debt - Schedule of Line of Credit and Short-term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Short-term Debt [Line Items]
Short-term debt	$ 63,490	$ 23,704
Long-term debt	34,700	5,697
Total debt	98,190	29,401
Short-term debt and current portion of long-term debt	63,490	23,704
Debt, Non-current	34,700	5,697
Term loan | Secured debt
Short-term Debt [Line Items]
Long-term debt	59,790	29,401
Line of credit | Revolving Credit Facility
Short-term Debt [Line Items]
Short-term debt	38,400	0
CTBC Bank, due August 31, 2021 | Term loan | Secured debt
Short-term Debt [Line Items]
Short-term debt	25,090	23,704
CTBC Bank, due August 31, 2021 | Line of credit | Revolving Credit Facility
Short-term Debt [Line Items]
Short-term debt	18,000	0
E.SUN Credit Facility | Line of credit | Revolving Credit Facility
Short-term Debt [Line Items]
Short-term debt	20,400	0
CTBC Bank, due June 4, 2030 | Term loan | Secured debt
Short-term Debt [Line Items]
Long-term debt	$ 34,700	$ 5,697

Short-term and Long-term Debt_2

Short-term and Long-term Debt - 2018 Bank of America Credit Facility (Details) - USD ($)	Jun. 28, 2021	Apr. 30, 2018	Jun. 30, 2021	Jun. 30, 2020	Oct. 31, 2019	Sep. 30, 2019	Oct. 31, 2018
Short-term Debt [Line Items]
Debt, total outstanding borrowings			$ 63,490,000	$ 23,704,000
Line of credit | Revolving Credit Facility | Bank of America 2018 Credit Agreement | Bank of America
Short-term Debt [Line Items]
Credit facility, maximum borrowing capacity	$ 200,000,000	$ 250,000,000
Line of credit facility, accordion feature, increase limit	$ 150,000,000	$ 100,000,000
Line of credit facility, unused capacity, commitment fee percentage		0.375%
Debt, total outstanding borrowings			$ 0	$ 0
Interest rate (as a percent)			1.50%	3.00%
Debt issuance costs, gross			$ 500,000	$ 600,000
Credit facility, remaining borrowing capacity			200,000,000
Line of credit | Revolving Credit Facility | Bank of America 2018 Credit Agreement | Bank of America | Minimum
Short-term Debt [Line Items]
Line of credit facility, unused capacity, commitment fee percentage	0.20%
Line of credit | Revolving Credit Facility | Bank of America 2018 Credit Agreement | Bank of America | Maximum
Short-term Debt [Line Items]
Line of credit facility, unused capacity, commitment fee percentage	0.30%
Line of credit | Revolving Credit Facility | Bank of America 2018 Credit Agreement | Bank of America | LIBOR | Minimum
Short-term Debt [Line Items]
Credit facility, basis spread on variable rate (as a percent)	1.375%	2.00%
Line of credit | Revolving Credit Facility | Bank of America 2018 Credit Agreement | Bank of America | LIBOR | Maximum
Short-term Debt [Line Items]
Credit facility, basis spread on variable rate (as a percent)	1.625%	3.00%
Standby Letters of Credit | Revolving Credit Facility | Bank of America 2018 Credit Agreement | Bank of America
Short-term Debt [Line Items]
Credit facility, maximum borrowing capacity					$ 6,400,000	$ 3,200,000	$ 3,200,000
Letters of credit outstanding amount			$ 0

Short-term and Long-term Debt_3

Short-term and Long-term Debt - CTBC Bank (Details)	1 Months Ended
	May 31, 2020USD ($)	Jun. 30, 2019USD ($)	Jun. 30, 2021USD ($)	Feb. 28, 2021	Jun. 30, 2020USD ($)	May 31, 2020TWD ($)	Jun. 30, 2019TWD ($)
Short-term Debt [Line Items]
Short-term debt			$ 63,490,000		$ 23,704,000
Long-term debt			$ 34,700,000		$ 5,697,000
CTBC Bank
Short-term Debt [Line Items]
Interest rate (as a percent)			0.75%		0.63%
Secured debt | Term loan | CTBC Bank term loan, due August 31, 2021
Short-term Debt [Line Items]
Short-term debt			$ 25,090,000		$ 23,704,000
Credit facility, remaining borrowing capacity			6,900,000
Secured debt | CTBC Bank | Term loan | CTBC Bank term loan, due August 31, 2021
Short-term Debt [Line Items]
Credit facility, term		12 months
Credit facility, maximum borrowing capacity		$ 24,000,000					$ 700,000,000
Long-term debt			18,000,000		0
Secured debt | CTBC Bank | Term loan | CTBC Bank term loan, due June 4, 2030
Short-term Debt [Line Items]
Credit facility, term	10 years
Credit facility, maximum borrowing capacity	$ 40,700,000					$ 1,200,000,000
Percent of balances owed on commercial invoices, limitation on proceeds amount	80.00%					80.00%
Secured debt | CTBC Bank | Term loan | 2021 CTBC Credit Lines
Short-term Debt [Line Items]
Credit facility, maximum borrowing capacity		$ 55,400,000					1,550,000,000
Collateral amount			70,700,000
Customs Bond | CTBC Bank | Term loan | CTBC Credit Facility, 12 Month, Up To 0.50% Interest
Short-term Debt [Line Items]
Credit facility, term		12 months
Credit facility, maximum borrowing capacity		$ 3,400,000					$ 100,000,000
Interest rate, stated percentage		0.50%					0.50%
Customs Bond | CTBC Bank | Term loan | CTBC Credit Facility, 180Day, Up To 100% Of Eligible Accounts Receivable, Between 0.30% And 0.50% Interest
Short-term Debt [Line Items]
Credit facility, term		180 days
Credit facility, maximum borrowing capacity		$ 51,500,000					$ 1,500,000,000
Percent of eligible accounts receivable		100.00%					100.00%
Customs Bond | CTBC Bank | Line of credit | CTBC Bank term loan, due August 31, 2021
Short-term Debt [Line Items]
Credit facility, maximum borrowing capacity		$ 50,000,000
Customs Bond | CTBC Bank | Line of credit | CTBC Credit Facility, 12 Month, Up To 100% Of Eligible Accounts Receivable, Between 0.30% And 0.50% Interest
Short-term Debt [Line Items]
Credit facility, term		12 months
Credit facility, maximum borrowing capacity		$ 50,000,000
Percent of eligible accounts receivable		100.00%					100.00%
Revolving Credit Facility | Line of credit | CTBC Bank term loan, due August 31, 2021
Short-term Debt [Line Items]
Collateral amount			$ 24,800,000
Revolving Credit Facility | CTBC Bank | Line of credit | 2021 CTBC Credit Lines
Short-term Debt [Line Items]
Credit facility, maximum borrowing capacity		$ 105,000,000
CTBC's Established NTD Interest Rate | Secured debt | CTBC Bank | Term loan | CTBC Bank term loan, due August 31, 2021
Short-term Debt [Line Items]
Credit facility, basis spread on variable rate (as a percent)		0.25%
Two-Year Term Floating Rate Of Postal Saving Interest Rate | Secured debt | CTBC Bank | Term loan | CTBC Bank term loan, due June 4, 2030
Short-term Debt [Line Items]
Credit facility, basis spread on variable rate (as a percent)	0.105%
Base Rate | Secured debt | CTBC Bank | Term loan | CTBC Bank term loan, due June 4, 2030
Short-term Debt [Line Items]
Credit facility, basis spread on variable rate (as a percent)	4.00%
Minimum | Secured debt | CTBC Bank | Term loan | CTBC Bank term loan, due August 31, 2021
Short-term Debt [Line Items]
Interest rate (as a percent)			0.98%	0.70%
Minimum | Customs Bond | CTBC Bank | Line of credit | CTBC Credit Facility, 12 Month, Up To 100% Of Eligible Accounts Receivable, Between 0.30% And 0.50% Interest
Short-term Debt [Line Items]
Increase to stated rate		0.80%
Minimum | CTBC's Established NTD Interest Rate | Customs Bond | CTBC Bank | Term loan | CTBC Credit Facility, 180Day, Up To 100% Of Eligible Accounts Receivable, Between 0.30% And 0.50% Interest
Short-term Debt [Line Items]
Credit facility, basis spread on variable rate (as a percent)		0.30%
Minimum | CTBC's Established USD Interest Rate | Customs Bond | CTBC Bank | Line of credit | CTBC Credit Facility, 12 Month, Up To 100% Of Eligible Accounts Receivable, Between 0.30% And 0.50% Interest
Short-term Debt [Line Items]
Credit facility, basis spread on variable rate (as a percent)		0.30%
Maximum | Secured debt | CTBC Bank | Term loan | CTBC Bank term loan, due August 31, 2021
Short-term Debt [Line Items]
Interest rate (as a percent)				0.75%
Maximum | CTBC's Established NTD Interest Rate | Customs Bond | CTBC Bank | Term loan | CTBC Credit Facility, 180Day, Up To 100% Of Eligible Accounts Receivable, Between 0.30% And 0.50% Interest
Short-term Debt [Line Items]
Credit facility, basis spread on variable rate (as a percent)		0.50%
Maximum | CTBC's Established USD Interest Rate | Customs Bond | CTBC Bank | Line of credit | CTBC Credit Facility, 12 Month, Up To 100% Of Eligible Accounts Receivable, Between 0.30% And 0.50% Interest
Short-term Debt [Line Items]
Credit facility, basis spread on variable rate (as a percent)		0.50%
Term loan | Secured debt
Short-term Debt [Line Items]
Long-term debt			$ 59,790,000		29,401,000
Term loan | Secured debt | CTBC Bank term loan, due June 4, 2030
Short-term Debt [Line Items]
Long-term debt			$ 34,700,000		$ 5,697,000
Term loan | Secured debt | CTBC Bank | CTBC Bank term loan, due June 4, 2030
Short-term Debt [Line Items]
Interest rate (as a percent)			0.45%		0.45%
Collateral amount			$ 45,900,000

Short-term and Long-term Debt_4

Short-term and Long-term Debt - E.SUN Bank Credit Facility Narrative (Details) - Revolving Credit Facility - E.SUN Credit Facility - E.SUN Bank - Line of credit - USD ($)	Dec. 02, 2020	Jun. 30, 2021	Dec. 31, 2020
Short-term Debt [Line Items]
Credit facility, maximum borrowing capacity	$ 30,000,000		$ 30,000,000
Credit facility, term	120 days
Long-term debt		$ 20,400,000
Credit facility, remaining borrowing capacity		$ 9,600,000
Minimum
Short-term Debt [Line Items]
Interest rate (as a percent)		1.00%
Maximum
Short-term Debt [Line Items]
Interest rate (as a percent)		1.29%
LIBOR
Short-term Debt [Line Items]
Credit facility, basis spread on variable rate (as a percent)	1.00%
Basis spread on variable rate, divided by amount	0.946
TAIFX
Short-term Debt [Line Items]
Credit facility, basis spread on variable rate (as a percent)	0.80%
Basis spread on variable rate, divided by amount	0.946

Short-term and Long-term Debt_5

Short-term and Long-term Debt - Maturities of Short-term and Long-term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Debt Disclosure [Abstract]
2022	$ 63,490
2023	413
2024	4,957
2025	4,957
2026	4,957
2027 and thereafter	19,416
Total debt	$ 98,190	$ 29,401

Other Long-term Liabilities - S

Other Long-term Liabilities - Schedule of Other Long-term Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Other Liabilities Disclosure [Abstract]
Accrued unrecognized tax benefits including related interest and penalties	$ 17,841	$ 15,496
Operating lease liability, non-current	14,539	18,102
Accrued warranty costs, non-current	2,678	2,395	$ 2,373
Others	6,074	6,002
Total other long-term liabilities	$ 41,132	$ 41,995
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Total other long-term liabilities	Total other long-term liabilities

Leases - Summary of Lease Costs

Leases - Summary of Lease Costs and Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Lessee, Lease, Description [Line Items]
Operating lease expense (including expense for lease agreements with related parties of $1,319 and $1,421 for the years ended June 30, 2021 and 2020, respectively)	$ 7,827	$ 6,993
Cash payments for operating leases (including payments to related parties of $1,351 and $1,443 for the years ended June 30, 2021 and 2020, respectively)	7,966	6,411
New operating lease assets obtained in exchange for operating lease liabilities	3,538	15,229
Affiliated
Lessee, Lease, Description [Line Items]
Operating lease expense (including expense for lease agreements with related parties of $1,319 and $1,421 for the years ended June 30, 2021 and 2020, respectively)	1,319	1,421
Cash payments for operating leases (including payments to related parties of $1,351 and $1,443 for the years ended June 30, 2021 and 2020, respectively)	$ 1,351	$ 1,443

Leases - Narrative (Details)

Leases - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Short-term lease payments	$ 1.8	$ 1.3	$ 0
Operating lease, weighted average remaining lease term	3 years 9 months 18 days
Incremental borrowing rate	3.40%

Leases - Maturities of Operatin

Leases - Maturities of Operating Lease Liabilities (Details) $ in Thousands	Jun. 30, 2021USD ($)
Leases [Abstract]
2022	$ 6,932
2023	5,430
2024	4,538
2025	4,382
2026 and beyond	1,017
Total future lease payments	22,299
Less: Imputed interest	(1,438)
Present value of operating lease liabilities	$ 20,861

Related Party Transactions - Na

Related Party Transactions - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Related Party Transaction [Line Items]
Outstanding purchase order	$ 569,800
Purchases from related party	239,558	$ 283,056	$ 276,843
Affiliated
Related Party Transaction [Line Items]
Outstanding purchase order	$ 111,200
Ablecom Technology
Related Party Transaction [Line Items]
Products purchased percent	91.80%	95.50%	96.30%
Ablecom Technology | Affiliated
Related Party Transaction [Line Items]
Outstanding purchase order	$ 40,200	$ 23,200
Purchases from related party	$ 130,852	160,084	$ 145,273
Ablecom Technology | Steve Liang and other family members | Management and Immediate Family Member of Management
Related Party Transaction [Line Items]
Ownership percentage	28.80%
Ablecom Technology | Charles Liang and wife | Investee
Related Party Transaction [Line Items]
Ownership percentage	10.50%
Compuware
Related Party Transaction [Line Items]
Outstanding purchase order	$ 71,000	45,700
Compuware | Affiliated
Related Party Transaction [Line Items]
Purchases from related party	115,213	131,763	139,579
Monolithic Power Systems (MPS) | Affiliated
Related Party Transaction [Line Items]
Purchases from related party	$ 3,900	$ 5,200	$ 3,700

Related Party Transactions - Su

Related Party Transactions - Summary of Related Party Transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Related Party Transaction [Line Items]
Revenue from related parties	$ 79,018	$ 85,759	$ 69,906
Purchases from related party	239,558	283,056	276,843
Other long-term liabilities, related party	0	1,699
Ablecom Technology | Affiliated
Related Party Transaction [Line Items]
Purchases from related party	130,852	160,084	145,273
Accounts receivable and other receivables, related party	5,577	6,379
Accounts payable and accrued liabilities, related party	41,194	40,056
Other long-term liabilities, related party	0	513
Compuware | Affiliated
Related Party Transaction [Line Items]
Revenue from related parties	27,865	23,867	17,651
Purchases from related party	115,213	131,763	$ 139,579
Accounts receivable and other receivables, related party	18,371	14,323
Accounts payable and accrued liabilities, related party	46,430	46,518
Other long-term liabilities, related party	$ 0	$ 186

Stock-based Compensation and _3

Stock-based Compensation and Stockholders' Equity - Equity Incentive Plan Narrative (Details) - shares	Jun. 05, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for outstanding awards (in shares)		5,175,554	5,379,768	7,374,635	8,301,138
Equity Incentive Plan, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	5,000,000
Shares reserved for future issuance (in shares)	1,045,000
Authorized shares available for future issuance (in shares)		2,730,277
Ownership percentage threshold for employee owned incentive stock options to qualify for exercise price per share	10.00%
Equity Incentive Plan, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized shares available for future issuance (in shares)	0
Shares reserved for outstanding awards (in shares)	7,246,000
Equity Incentive Plan, 2020, More Than 10% Ownership
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of fair market value	110.00%
Equity Incentive Plan, 2020, Less Than 10% Ownership
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of fair market value	100.00%
Year one | Equity Incentive Plan, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option and restricted stock units vesting rights, percentage		25.00%
Quarterly | Equity Incentive Plan, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option and restricted stock units vesting rights, percentage		6.25%
Stock options | Equity Incentive Plan, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option expected life (in years)		10 years
Employee stock options and restricted stock units | Equity Incentive Plan, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)		4 years

Stock-based Compensation and _4

Stock-based Compensation and Stockholders' Equity - Common Stock Repurchase and Retirement Narrative (Details) - USD ($)	Dec. 11, 2020	Jun. 30, 2020	Sep. 30, 2020	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2021	Jan. 29, 2021	Oct. 31, 2020	Aug. 09, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock retired to treasury stock (in shares)	2,475,419
Stock repurchases and retirement (in shares)						4,209,211
Stock repurchases and retirement						$ 130,000,000
Stock repurchased in prior period and retired during period (in shares)		1,333,125
August 2020 Share Repurchase Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program, authorized amount									$ 30,000,000
Purchase of treasury stock (in shares)			1,142,294
Purchase of treasury stock			$ 30,000,000
October 2020 Share Repurchase Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program, authorized amount								$ 50,000,000
Stock repurchases and retirement (in shares)					1,675,746
Stock repurchases and retirement					$ 50,000,000
January 2021 Share Repurchase Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program, authorized amount							$ 200,000,000
Stock repurchases and retirement (in shares)				1,391,171
Stock repurchases and retirement				$ 50,000,000

Stock-based Compensation and _5

Stock-based Compensation and Stockholders' Equity - Summary of Stock Option Valuation Assumptions (Details) - Stock options - $ / shares	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate, minimum	0.27%	0.47%	2.32%
Risk-free interest rate, maximum	1.09%	1.72%	2.97%
Volatility, minimum	50.03%	49.61%	47.34%
Volatility, maximum	50.43%	50.46%	50.28%
Expected term	5 years 11 months 23 days	6 years 3 months 7 days	6 years 18 days
Dividend yield	0.00%	0.00%	0.00%
Weighted average fair value (in dollars per share)	$ 14.92	$ 9.59	$ 9.25

Stock-based Compensation and _6

Stock-based Compensation and Stockholders' Equity - Schedule of Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense before taxes	$ 28,549	$ 20,189	$ 21,184
Income tax impact	(8,574)	(6,814)	(4,349)
Stock-based compensation expense, net	19,975	13,375	16,835
Cost of sales
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense before taxes	1,762	1,504	1,663
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense before taxes	14,030	12,202	12,981
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense before taxes	2,022	1,680	1,805
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense before taxes	$ 10,735	$ 4,803	$ 4,735

Stock-based Compensation and _7

Stock-based Compensation and Stockholders' Equity - Determining Fair Value Narrative (Details) $ in Millions	12 Months Ended
	Jun. 30, 2021USD ($)
Employee stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to non-vested stock-based awards	$ 8.4
Unrecognized compensation cost related to non-vested stock based awards, period for recognition	4 years
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to non-vested stock-based awards	$ 45.1
Unrecognized compensation cost related to non-vested stock based awards, period for recognition	2 years 8 months 23 days
Performance-Based Restricted Stock Units (PRSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to non-vested stock-based awards	$ 0.1
Unrecognized compensation cost related to non-vested stock based awards, period for recognition	4 months 9 days
2021 CEO Performance Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to non-vested stock-based awards	$ 10.5
Unrecognized compensation cost related to non-vested stock based awards, period for recognition	5 years

Stock-based Compensation and _8

Stock-based Compensation and Stockholders' Equity - Stock Option Activity Narrative (Details) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Mar. 31, 2021operationalMilestonetradingDayconsecutiveQuartertranche$ / sharesshares	Jun. 30, 2021USD ($)shares	Jun. 30, 2020USD ($)shares	Jun. 30, 2019USD ($)shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares) | shares		1,517,110	273,260	434,320
Stock-based compensation expense before taxes		$ 28,549	$ 20,189	$ 21,184
2021 CEO Performance Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares) | shares	1,000,000
Number of vesting tranches | tranche	5
Market price milestone, number of trading days | tradingDay	60
Number of operational milestones | operationalMilestone	5
Consecutive fiscal quarters for operational milestones | consecutiveQuarter	4
Stock-based compensation expense before taxes		1,100
Unrecognized compensation cost related to non-vested stock-based awards		$ 10,500
Unrecognized compensation cost related to non-vested stock based awards, period for recognition		5 years
2021 CEO Performance Stock Option | Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market price milestone (USD per share) | $ / shares	$ 45
2021 CEO Performance Stock Option | Tranche Five
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market price milestone (USD per share) | $ / shares	$ 120

Stock-based Compensation and _9

Stock-based Compensation and Stockholders' Equity - Summary of Operational and Stock Price Milestones (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net sales	$ 3,557,422	$ 3,339,281	$ 3,500,360
Milestone One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net sales	4,000,000
Milestone Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net sales	4,800,000
Milestone Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net sales	5,800,000
Milestone Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net sales	6,800,000
Milestone Five
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net sales	$ 8,000,000
2021 CEO Performance Stock Option | Milestone One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock price milestone (USD per share)	$ 45
2021 CEO Performance Stock Option | Milestone Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock price milestone (USD per share)	60
2021 CEO Performance Stock Option | Milestone Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock price milestone (USD per share)	75
2021 CEO Performance Stock Option | Milestone Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock price milestone (USD per share)	95
2021 CEO Performance Stock Option | Milestone Five
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock price milestone (USD per share)	$ 120

Stock-based Compensation and_10

Stock-based Compensation and Stockholders' Equity - Stock Option Activity Summary (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Options Outstanding
Balance at beginning of period (in shares)	5,379,768	7,374,635	8,301,138
Granted (in shares)	1,517,110	273,260	434,320
Exercised (in shares)	(1,645,800)	(1,812,000)
Forfeited (in shares)	(75,524)	(456,127)	(1,360,823)
Balance at end of period (in shares)	5,175,554	5,379,768	7,374,635
Options vested and exercisable (in shares)	3,448,888
Weighted Average Exercise Price per Share
Balance at beginning of period (in dollars per share)	$ 19.38	$ 18.02	$ 16.50
Granted (in dollars per share)	40.49	19.61	18.58
Exercised (in dollars per share)	17.25	15.74
Forfeited (in dollars per share)	24.43	11.97	8.94
Balance at end of period (in dollars per share)	26.17	$ 19.38	$ 18.02
Options vested and exercisable (in dollars per share)	$ 20.47
Weighted Average Remaining Contractual Term and Aggregate Intrinsic Value
Weighted average remaining contractual term, options outstanding (in years)	5 years 4 months 9 days
Weighted average remaining contractual term, options vested and exercisable (in years)	3 years 4 months 28 days
Aggregate intrinsic value, options outstanding	$ 57,099
Aggregate intrinsic value, options vested and exercisable	50,887
Total pretax intrinsic value of options exercised	$ 24,300	$ 19,300	$ 0

Stock-based Compensation and_11

Stock-based Compensation and Stockholders' Equity - Stock Option Summary by Exercise Price (Details)	12 Months Ended
	Jun. 30, 2021$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option outstanding, range of exercise price, lower range limit (in dollars per share)	$ 9.24
Stock option outstanding, range of exercise price, upper range limit (in dollars per share)	$ 45
Number of outstanding options (in shares) | shares	5,175,554
Stock option outstanding, weighted-average remaining contractual term	5 years 4 months 9 days
Weighted average exercise price per share, options outstanding (in dollars per share)	$ 26.17
Stock options vested and exercisable (in shares) | shares	3,448,888
Stock option vested and exercisable, weighted average exercise price per share (in dollars per share)	$ 20.47
$9.24 - $12.50
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option outstanding, range of exercise price, lower range limit (in dollars per share)	9.24
Stock option outstanding, range of exercise price, upper range limit (in dollars per share)	$ 12.50
Number of outstanding options (in shares) | shares	521,886
Stock option outstanding, weighted-average remaining contractual term	1 year 6 months 14 days
Weighted average exercise price per share, options outstanding (in dollars per share)	$ 10.81
Stock options vested and exercisable (in shares) | shares	521,886
Stock option vested and exercisable, weighted average exercise price per share (in dollars per share)	$ 10.81
$13.00 - $15.22
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option outstanding, range of exercise price, lower range limit (in dollars per share)	13
Stock option outstanding, range of exercise price, upper range limit (in dollars per share)	$ 15.22
Number of outstanding options (in shares) | shares	540,699
Stock option outstanding, weighted-average remaining contractual term	2 years 8 months 4 days
Weighted average exercise price per share, options outstanding (in dollars per share)	$ 14.33
Stock options vested and exercisable (in shares) | shares	490,794
Stock option vested and exercisable, weighted average exercise price per share (in dollars per share)	$ 14.40
$17.09 - $18.93
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option outstanding, range of exercise price, lower range limit (in dollars per share)	17.09
Stock option outstanding, range of exercise price, upper range limit (in dollars per share)	$ 18.93
Number of outstanding options (in shares) | shares	714,906
Stock option outstanding, weighted-average remaining contractual term	3 years 2 months 1 day
Weighted average exercise price per share, options outstanding (in dollars per share)	$ 17.94
Stock options vested and exercisable (in shares) | shares	648,411
Stock option vested and exercisable, weighted average exercise price per share (in dollars per share)	$ 17.97
$20.37 - $22.10
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option outstanding, range of exercise price, lower range limit (in dollars per share)	20.37
Stock option outstanding, range of exercise price, upper range limit (in dollars per share)	$ 22.10
Number of outstanding options (in shares) | shares	619,745
Stock option outstanding, weighted-average remaining contractual term	4 years 10 months 24 days
Weighted average exercise price per share, options outstanding (in dollars per share)	$ 21.13
Stock options vested and exercisable (in shares) | shares	547,375
Stock option vested and exercisable, weighted average exercise price per share (in dollars per share)	$ 21.10
$22.15 - $25.44
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option outstanding, range of exercise price, lower range limit (in dollars per share)	22.15
Stock option outstanding, range of exercise price, upper range limit (in dollars per share)	$ 25.44
Number of outstanding options (in shares) | shares	614,906
Stock option outstanding, weighted-average remaining contractual term	5 years 9 months 21 days
Weighted average exercise price per share, options outstanding (in dollars per share)	$ 24.26
Stock options vested and exercisable (in shares) | shares	436,968
Stock option vested and exercisable, weighted average exercise price per share (in dollars per share)	$ 24.67
$26.60 - $28.71
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option outstanding, range of exercise price, lower range limit (in dollars per share)	26.60
Stock option outstanding, range of exercise price, upper range limit (in dollars per share)	$ 28.71
Number of outstanding options (in shares) | shares	536,681
Stock option outstanding, weighted-average remaining contractual term	4 years 8 months 8 days
Weighted average exercise price per share, options outstanding (in dollars per share)	$ 27.08
Stock options vested and exercisable (in shares) | shares	529,181
Stock option vested and exercisable, weighted average exercise price per share (in dollars per share)	$ 27.06
$30.33 - $38.50
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option outstanding, range of exercise price, lower range limit (in dollars per share)	30.33
Stock option outstanding, range of exercise price, upper range limit (in dollars per share)	$ 38.50
Number of outstanding options (in shares) | shares	590,341
Stock option outstanding, weighted-average remaining contractual term	7 years 3 months 3 days
Weighted average exercise price per share, options outstanding (in dollars per share)	$ 34.31
Stock options vested and exercisable (in shares) | shares	246,273
Stock option vested and exercisable, weighted average exercise price per share (in dollars per share)	$ 34.48
$39.19 - $39.19
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option outstanding, range of exercise price, lower range limit (in dollars per share)	39.19
Stock option outstanding, range of exercise price, upper range limit (in dollars per share)	$ 39.19
Number of outstanding options (in shares) | shares	28,000
Stock option outstanding, weighted-average remaining contractual term	3 years 7 months 13 days
Weighted average exercise price per share, options outstanding (in dollars per share)	$ 39.19
Stock options vested and exercisable (in shares) | shares	28,000
Stock option vested and exercisable, weighted average exercise price per share (in dollars per share)	$ 39.19
$42.35 - $42.35
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option outstanding, range of exercise price, lower range limit (in dollars per share)	42.35
Stock option outstanding, range of exercise price, upper range limit (in dollars per share)	$ 42.35
Number of outstanding options (in shares) | shares	8,390
Stock option outstanding, weighted-average remaining contractual term	4 years 9 months 25 days
Weighted average exercise price per share, options outstanding (in dollars per share)	$ 42.35
Stock options vested and exercisable (in shares) | shares	0
Stock option vested and exercisable, weighted average exercise price per share (in dollars per share)	$ 0
$45.00 - $45.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option outstanding, range of exercise price, lower range limit (in dollars per share)	45
Stock option outstanding, range of exercise price, upper range limit (in dollars per share)	$ 45
Number of outstanding options (in shares) | shares	1,000,000
Stock option outstanding, weighted-average remaining contractual term	9 years 8 months 1 day
Weighted average exercise price per share, options outstanding (in dollars per share)	$ 45
Stock options vested and exercisable (in shares) | shares	0
Stock option vested and exercisable, weighted average exercise price per share (in dollars per share)	$ 0

Stock-based Compensation and_12

Stock-based Compensation and Stockholders' Equity - RSU and PRSU Activity Narrative (Details) $ in Thousands	1 Months Ended		12 Months Ended			36 Months Ended
	Mar. 31, 2020trancheshares	Aug. 31, 2017shares	Jun. 30, 2021USD ($)shares	Jun. 30, 2020USD ($)shares	Jun. 30, 2019USD ($)shares	Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payment of withholding tax on vesting of restricted stock units | $			$ (8,721)	$ (8,243)	$ (3,051)
Share-Based Compensation Arrangement By Share-Based Payment Award, Number Of Tranches | tranche	2
Restricted Stock Units (RSUs) and Performance-Based Restricted Stock Units (PRSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total pretax intrinsic value of restricted stock units vested | $			$ 32,600	$ 18,900	$ 14,300
Vested (in shares)			1,011,406	979,274	549,886
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares withheld for taxes (in shares)			274,620	331,648	175,044
Vested (in shares)			984,406	871,274	549,886
Performance-Based Restricted Stock Units (PRSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards (in shares)		2
Award shares issued in period (in shares)			0
Vested (in shares)			27,000	108,000	0
Share-Based Compensation Arrangement By Share-Based Payment Award, Number Of Units Per Vesting Tranche	15,000
Common Stock and Additional Paid-In Capital
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares withheld for taxes (in shares)			274,620	331,648	175,044
Year one | Performance-Based Restricted Stock Units (PRSUs), One-Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance-based restricted stock units vesting rights, percentage		50.00%
Quarterly | Performance-Based Restricted Stock Units (PRSUs), One-Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance-based restricted stock units vesting rights, percentage						50.00%

Stock-based Compensation and_13

Stock-based Compensation and Stockholders' Equity - Schedule of RSU and PRSU Activity (Details) - $ / shares	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Restricted stock units
Time-based RSUs Outstanding
Balance at beginning of period (in shares)	1,768,027	1,873,102	1,480,605
Granted (in shares)	1,334,418	943,650	1,086,911
Vested (in shares)	(984,406)	(871,274)	(549,886)
Forfeited (in shares)	(263,083)	(177,451)	(144,528)
Balance at end of period (in shares)	1,854,956	1,768,027	1,873,102
Weighted Average Grant-Date Fair Value per Share
Balance at beginning of period (in dollars per share)	$ 20.08	$ 20.25	$ 23.34
Granted (in dollars per share)	31.54	20.45	18.37
Vested (in dollars per share)	21.63	20.97	24.87
Forfeited (in dollars per share)	25.01	19.49	20.25
Balance at end of period (in dollars per share)	$ 26.79	$ 20.08	$ 20.25
Shares vested but not released (in shares)	172,857
Performance-Based Restricted Stock Units (PRSUs)
Time-based RSUs Outstanding
Balance at beginning of period (in shares)	42,000	120,000	120,000
Granted (in shares)	30,000	30,000	0
Vested (in shares)	(27,000)	(108,000)	0
Forfeited (in shares)	(30,000)	0	0
Balance at end of period (in shares)	15,000	42,000	120,000
Weighted Average Grant-Date Fair Value per Share
Balance at beginning of period (in dollars per share)	$ 22.29	$ 27.10	$ 27.10
Granted (in dollars per share)	34.27	20.37
Vested (in dollars per share)	23.36	27.10
Forfeited (in dollars per share)	20.37
Balance at end of period (in dollars per share)	$ 34.27	$ 22.29	$ 27.10
Shares vested but not released (in shares)	24,000

Income Taxes - Schedule of Comp

Income Taxes - Schedule of Components of Income Before Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
United States	$ 80,922	$ 35,701	$ 45,126
Foreign	37,706	49,127	44,397
Income before income tax provision	$ 118,628	$ 84,828	$ 89,523

Income Taxes - Schedule of Inco

Income Taxes - Schedule of Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Current:
Federal	$ 3,406	$ 4,568	$ 12,308
State	1,077	1,727	2,917
Foreign	10,843	10,399	16,531
Current income tax expense (benefit)	15,326	16,694	31,756
Deferred:
Federal	(5,489)	(10,108)	(13,078)
State	(409)	(1,621)	(2,888)
Foreign	(2,492)	(2,043)	(906)
Deferred income tax expense (benefit)	(8,390)	(13,772)	(16,872)
Income tax provision	$ 6,936	$ 2,922	$ 14,884

Income Taxes - Schedule of Net

Income Taxes - Schedule of Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Deferred Tax Assets, Net [Abstract]
Research and development credits	$ 30,540	$ 24,304
Deferred revenue	18,584	20,354
Inventory valuation	13,831	13,946
Capitalized research and development costs	15,206	7,509
Stock-based compensation	3,868	4,075
Lease obligations	2,861	3,632
Accrued vacation and bonus	5,098	3,281
Prepaid and accrued expenses	1,179	2,560
Warranty accrual	2,154	2,051
Bad debt and other reserves	1,668	1,917
Marketing fund accrual	720	548
Other	4,460	3,652
Total deferred income tax assets	100,169	87,829
Deferred tax liabilities-depreciation and other	(4,137)	(4,428)
Right of use asset	(2,831)	(3,612)
Valuation allowance	(29,913)	(24,891)
Deferred income tax assets, net	$ 63,288	$ 54,898

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Feb. 29, 2020	Oct. 31, 2019
Income Tax Disclosure [Line Items]
Decrease in tax credit carryforward, valuation allowance	$ 5,000	$ 3,900
Deferred income tax assets-net	63,288	54,898
Tax Cuts And Jobs Act of 2017, Foreign derived intangible income, income tax benefit	3,000	1,900
Unrecognized tax benefits that would impact effective tax rate, if recognized	27,100	13,400
Unrecognized tax benefits, income tax penalties and interest accrued	2,500	2,100
Decrease in unrecognized tax benefits is reasonably possible	1,000
Taiwan Tax Authority
Income Tax Disclosure [Line Items]
Income tax examination, increase (decrease) liability			$ 1,000	$ 1,600
Research Tax Credit Carryforward | California Franchise Tax Board
Income Tax Disclosure [Line Items]
Excess tax credits, valuation allowance	37,100	30,800
Research Tax Credit Carryforward | Federal
Income Tax Disclosure [Line Items]
Excess tax credits, valuation allowance	29,300	$ 24,300
Research Tax Credit Carryforward | State and local jurisdiction
Income Tax Disclosure [Line Items]
State research and development tax credit carryforwards	$ 50,200

Income Taxes - Schedule of Effe

Income Taxes - Schedule of Effective Federal Tax Rate Reconciliation (Details)	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Income tax provision at statutory rate	21.00%	21.00%	21.00%
State income tax, net of federal tax benefit	0.30%	0.00%	0.50%
Foreign rate differential	(0.50%)	0.00%	1.10%
Research and development tax credit	(10.50%)	(13.10%)	(9.50%)
Uncertain tax positions, net of (settlement) with Tax Authorities	2.00%	(2.30%)	4.10%
Foreign derived intangible / Subpart F income inclusion	(2.50%)	(3.80%)	(2.10%)
Stock-based compensation	(3.30%)	(2.80%)	2.10%
Non deductible penalty on SEC matter	0.00%	4.40%	0.00%
Provision to return true-up	(1.90%)	(1.10%)	(1.60%)
Other, net	1.20%	1.10%	1.00%
Effective tax rate	5.80%	3.40%	16.60%

Income Taxes - Schedule of Unre

Income Taxes - Schedule of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Beginning balance	$ 27,206	$ 28,048	$ 25,117
Gross increases:
For current year’s tax positions	13,333	8,769	7,789
For prior years’ tax positions	1,439	505	0
Gross decreases:
Decreases due to settlements with taxing authority		(7,632)	(1,504)
Decreases due to settlements with taxing authority	(1,243)	(2,484)	(3,354)
Ending balance	$ 40,735	$ 27,206	$ 28,048

Commitments and Contingencies -

Commitments and Contingencies - Litigation and Claims Narrative (Details)	Feb. 08, 2018claim
Commitments and Contingencies Disclosure [Abstract]
Loss contingency, pending claims, number	2

Commitments and Contingencies_2

Commitments and Contingencies - SEC Matter (Details) $ in Thousands	3 Months Ended
	Sep. 30, 2020USD ($)
Loss Contingencies [Line Items]
Loss contingency accrual, payments	$ 17,500
Chief Executive Officer
Loss Contingencies [Line Items]
Former gain contingency, recognized in current period	$ 2,122

Commitments and Contingencies_3

Commitments and Contingencies - Purchase Commitments Narrative (Details) $ in Millions	Jun. 30, 2021USD ($)
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Purchase commitments, total	$ 569.8
Affiliated
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Purchase commitments, total	$ 111.2

Commitments and Contingencies_4

Commitments and Contingencies - Standby Letter of Credit Narrative (Details) - USD ($) $ in Millions	Oct. 31, 2019	Sep. 30, 2019	Oct. 31, 2018
Bank of America | Standby Letters of Credit | Revolving Credit Facility | Bank of America 2018 Credit Agreement
Line of Credit Facility [Line Items]
Credit facility, maximum borrowing capacity	$ 6.4	$ 3.2	$ 3.2

Retirement Plans - Narrative (D

Retirement Plans - Narrative (Details) - USD ($)	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
401(k) Savings Plan
Defined Benefit Plan Disclosure [Line Items]
Company's discretionary contributions	$ 0	$ 0	$ 0
Super Micro Computer, B.V.
Defined Benefit Plan Disclosure [Line Items]
Company's discretionary contributions	700,000	600,000	500,000
Super Micro Computer, Taiwan | Pension Plan | Super Micro Computer, Taiwan Defined Benefit Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Company's contribution costs	$ 2,500,000	$ 1,900,000	$ 1,600,000
Super Micro Computer, Taiwan | Pension Plan | R.O.C. Labor Standards Law Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, employer discretionary contribution, percent of match	2.00%
Pension expense	$ 1,000,000

Segment Reporting - Narrative (

Segment Reporting - Narrative (Details)	12 Months Ended
	Jun. 30, 2021segment
Segment Reporting [Abstract]
Number of operating segments	1

Segment Reporting - Property, P

Segment Reporting - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Property, plant and equipment	$ 274,713	$ 233,785
United States
Segment Reporting Information [Line Items]
Property, plant and equipment	180,143	178,812
Asia
Segment Reporting Information [Line Items]
Property, plant and equipment	91,640	51,605
Europe
Segment Reporting Information [Line Items]
Property, plant and equipment	$ 2,930	$ 3,368

Uncategorized Items - smci-2021

Label	Element	Value
Money Market Funds [Member]
Restricted Cash and Cash Equivalents	us-gaap_RestrictedCashAndCashEquivalents	$ 200,000
Restricted Cash and Cash Equivalents	us-gaap_RestrictedCashAndCashEquivalents	800,000
Certificates of Deposit [Member]
Restricted Cash and Cash Equivalents	us-gaap_RestrictedCashAndCashEquivalents	400,000
Restricted Cash and Cash Equivalents	us-gaap_RestrictedCashAndCashEquivalents	$ 300,000