Super Micro Computer (SMCI) 10-Q 6 Nov 20 2021 Q1 Quarterly report Financial data

Cover

Cover - shares	3 Months Ended
	Sep. 30, 2020	Oct. 31, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
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 Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Smaller Reporting Company	false
Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		51,782,128
Entity Central Index Key	0001375365
Current Fiscal Year End Date	--06-30
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Amendment Flag	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Current assets:
Cash and cash equivalents	$ 300,089	$ 210,533
Accounts receivable, net of allowances of $3,290 and $4,586 at September 30, 2020 and June 30, 2020, respectively (including accounts receivable from related parties of $1,202 and $8,712 at September 30, 2020 and June 30, 2020, respectively)	322,845	403,745
Inventories	773,856	851,498
Prepaid expenses and other current assets (including other receivables from related parties of $7,708 and $19,791 at September 30, 2020 and June 30, 2020, respectively)	82,731	126,985
Total current assets	1,479,521	1,592,761
Investment in equity investee	5,025	2,703
Property, plant and equipment, net	241,852	233,785
Deferred income taxes, net	55,122	54,898
Other assets	35,173	34,499
Total assets	1,816,693	1,918,646
Current liabilities:
Accounts payable (including amounts due to related parties of $47,692 and $72,368 at September 30, 2020 and June 30, 2020, respectively)	333,359	417,673
Accrued liabilities (including amounts due to related parties of $12,629 and $16,206 at September 30, 2020 and June 30, 2020, respectively)	121,710	155,401
Income taxes payable	6,325	4,700
Short-term debt	24,047	23,704
Deferred revenue	104,247	106,157
Total current liabilities	589,688	707,635
Deferred revenue, non-current	97,576	97,612
Long-term debt, net of debt issuance costs	11,980	5,697
Other long-term liabilities (including related party balance of $1,169 and $1,699 at September 30, 2020 and June 30, 2020, respectively)	44,707	41,995
Total liabilities	743,951	852,939
Commitments and contingencies (Note 11)
Stockholders’ equity:
Common stock and additional paid-in capital, $.001 par value, Authorized shares: 100,000,000, Outstanding shares 51,765,627 and 52,408,70, Issued shares 52,241,046 and 53,741,828 at September 30, 2020 and June 30, 2020, respectively	400,157	389,972
Treasury stock (at cost), 2,475,419 and 1,333,125 shares at September 30, 2020 and June 30, 2020, respectively	(50,491)	(20,491)
Accumulated other comprehensive gain (loss)	95	(152)
Retained earnings	722,812	696,211
Total Super Micro Computer, Inc. stockholders’ equity	1,072,573	1,065,540
Noncontrolling interest	169	167
Total stockholders’ equity	1,072,742	1,065,707
Total liabilities and stockholders’ equity	$ 1,816,693	$ 1,918,646

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Current assets:
Accounts Receivable, Allowance for Credit Loss, Current	$ 3,290	$ 4,586
Accounts Receivable, Related Parties, Current	1,202	8,712
Prepaid expenses, related party	7,708	19,791
Current liabilities:
Accounts payable, related party	47,692	72,368
Accrued liabilities, related party	12,629	16,206
Other long-term liabilities, related parties	$ 1,169	$ 1,699
Stockholders’ equity:
Common stock, 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)	51,765,627	52,408,703
Common stock, shares issued (in shares)	54,241,046	53,741,828
Treasury stock, shares (in shares)	2,475,419	1,333,125

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Net sales (including related party sales of $13,899 and $27,662 in the three months ended September 30, 2020 and 2019, respectively)	$ 762,250	$ 799,804
Cost of sales (including related party purchases of $62,199 and $65,033 in the three months ended September 30, 2020 and 2019, respectively)	632,335	668,875
Gross profit	129,915	130,929
Operating expenses:
Research and development	54,798	49,572
Sales and marketing	20,292	20,194
General and administrative	24,379	28,298
Total operating expenses	99,469	98,064
Income from operations	30,446	32,865
Other (expense) income, net	(841)	1,589
Interest expense	(674)	(552)
Income before income tax provision	28,931	33,902
Income tax provision	(3,660)	(8,568)
Share of income from equity investee, net of taxes	1,330	1,011
Net income	$ 26,601	$ 26,345
Net income per common share:
Basic (in dollars per share)	$ 0.51	$ 0.52
Diluted (in dollars per share)	$ 0.49	$ 0.51
Weighted-average shares used in calculation of net income per common share:
Basic (in shares)	52,329	50,274
Diluted (in shares)	54,426	51,704

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Revenue from Related Parties	$ 13,899	$ 27,662
Related Party Transaction, Purchases from Related Party	$ 62,199	$ 65,033

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 26,601	$ 26,345
Other comprehensive income (loss), net of tax:
Foreign currency translation gain (loss)	247	(140)
Total other comprehensive income (loss)	247	(140)
Total comprehensive income	$ 26,848	$ 26,205

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock and Additional Paid-In Capital	Treasury Stock	Accumulated Other Comprehensive Loss	Retained Earnings	Non-controlling Interest
Beginning balance (in shares) at Jun. 30, 2019		51,289,413	(1,333,125)
Beginning balance at Jun. 30, 2019	$ 941,176	$ 349,683	$ (20,491)	$ (80)	$ 611,903	$ 161
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Release of common stock shares upon vesting of restricted stock units (in shares)		100,186
Shares withheld for the withholding tax on vesting of restricted stock units (in shares)		(30,789)
Shares withheld for the withholding tax on vesting of restricted stock units	(580)	$ (580)
Stock-based compensation	5,054	$ 5,054
Foreign currency translation gain (loss)	(140)			(140)
Net income	26,346				26,345	1
Ending balance (in shares) at Sep. 30, 2019		51,358,810	(1,333,125)
Ending balance at Sep. 30, 2019	$ 971,856	$ 354,157	$ (20,491)	(220)	638,248	162
Beginning balance (in shares) at Jun. 30, 2020	52,408,703	53,741,828	(1,333,125)
Beginning balance at Jun. 30, 2020	$ 1,065,707	$ 389,972	$ (20,491)	(152)	696,211	167
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options, net of taxes (in shares)	350,830	350,830
Exercise of stock options, net of taxes	$ 5,020	$ 5,020
Release of common stock shares upon vesting of restricted stock units (in shares)		217,519
Shares withheld for the withholding tax on vesting of restricted stock units (in shares)		(69,131)
Shares withheld for the withholding tax on vesting of restricted stock units	(2,005)	$ (2,005)
Stock repurchases (in shares)			(1,142,294)
Stock repurchases	(30,000)		$ (30,000)
Stock-based compensation	7,170	$ 7,170
Foreign currency translation gain (loss)	247			247
Net income	$ 26,603				26,601	2
Ending balance (in shares) at Sep. 30, 2020	51,765,627	54,241,046	(2,475,419)
Ending balance at Sep. 30, 2020	$ 1,072,742	$ 400,157	$ (50,491)	$ 95	$ 722,812	$ 169

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
OPERATING ACTIVITIES:
Net income	$ 26,601	$ 26,345
Reconciliation of net income to net cash provided by operating activities:
Depreciation and amortization	7,517	6,826
Stock-based compensation expense	7,170	5,054
Allowances for (recovery of) doubtful accounts	(154)	56
Provision for (recovery of) excess and obsolete inventories	(902)	8,328
Share of income from equity investee	(1,330)	(1,011)
Foreign currency exchange (gain) loss	618	(561)
Deferred income taxes, net	(224)	(585)
Other	(719)	289
Changes in operating assets and liabilities:
Accounts receivable (including changes in related party balances of $7,510 and $(4,474) during the three months ended September 30, 2020 and 2019, respectively)	81,035	37,340
Inventories	78,544	(23,371)
Prepaid expenses and other assets (including changes in related party balances of $12,083 and $(3,554) during the three months ended September 30, 2020 and 2019, respectively)	43,724	(31,088)
Accounts payable (including changes in related party balances of $(24,676) and $3,796 during the three months ended September 30, 2020 and 2019, respectively)	(85,704)	(24,865)
Income taxes payable	1,625	(9,215)
Deferred revenue	(1,946)	(1,529)
Accrued liabilities (including changes in related party balances of $(3,577) and $5,324 during the three months ended September 30, 2020 and 2019, respectively)	(36,457)	12,693
Other long-term liabilities (including changes in related party balances of $(530) and $1,272 during the three months ended September 30, 2020 and 2019, respectively)	1,157	854
Net cash provided by operating activities	120,555	5,560
INVESTING ACTIVITIES:
Purchases of property, plant and equipment (including payments to related parties of $2,230 and $813 during the three months ended September 30, 2020 and 2019, respectively)	(11,851)	(13,325)
Net cash used in investing activities	(11,851)	(13,325)
FINANCING ACTIVITIES:
Proceeds from debt	6,408	0
Repayment of debt	(271)	0
Net repayment on asset-backed revolving line of credit	0	(1,116)
Proceeds from exercise of stock options	5,020	0
Payment of withholding tax on vesting of restricted stock units	(2,005)	(580)
Stock repurchases	(28,453)	0
Payments of obligations under finance leases	(26)	(19)
Net cash used in financing activities	(19,327)	(1,715)
Effect of exchange rate fluctuations on cash	185	(38)
Net increase (decrease) in cash, cash equivalents and restricted cash	89,562	(9,518)
Cash, cash equivalents and restricted cash at the beginning of the period	212,390	262,140
Cash, cash equivalents and restricted cash at the end of the period	301,952	252,622
Supplemental disclosure of cash flow information:
Cash paid for interest	512	777
Cash paid for taxes, net of refunds	1,204	30,800
Non-cash investing and financing activities:
Unpaid property, plant and equipment purchases (including due to related parties of $1,664 and $1,514 as of September 30, 2020 and 2019, respectively)	6,661	6,413
New operating lease assets obtained in exchange for operating lease liabilities	2,059	0
Stock Repurchased, Not Paid	$ 1,547	$ 0

Condensed Consolidated Statem_6

Condensed Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Net cash provided by (used in) operating activities
Increase (Decrease) in Accounts Receivable, Related Parties	$ 7,510	$ (4,474)
Increase (Decrease) in Prepaid Expenses and Other Current Assets, Related Parties	12,083	(3,554)
Increase (Decrease) in Accounts Payable, Related Parties	(24,676)	3,796
Increase (Decrease) in Accrued Liability, Related Parties	(3,577)	5,324
Increase (Decrease) in Other Long-Term Liabilities, Related Parties	(530)	1,272
Payments to Acquire Property, Plant, and Equipment, Related Party	2,230	813
Capital Expenditures Incurred but Not yet Paid, Related Party	$ 1,664	$ 1,514

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Significant Accounting Policies and Estimates No material changes have been made to the significant accounting policies of Super Micro Computer, Inc., a corporation incorporated under the laws of Delaware, and its consolidated entities (together, the “Company”), disclosed in Note 1, Organization and Summary of Significant Accounting Policies, in its Annual Report on Form 10-K, filed on August 28, 2020, for the year ended June 30, 2020. Management's estimates include, as applicable, the anticipated impacts of the coronavirus ("COVID-19') pandemic. Basis of Presentation The unaudited condensed consolidated financial statements included herein have been prepared by the Company pursuant to the rules and regulations of the United States Securities and Exchange Commission (the “SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principals in the United States of America ("U.S. GAAP") have been condensed or omitted pursuant to such rules and regulations. The unaudited condensed consolidated financial statements included herein reflect all adjustments, including normal recurring adjustments, which are, in the opinion of management, necessary for a fair presentation of the consolidated financial position, results of operations and cash flows for the periods presented. The consolidated results of operations for the three months ended September 30, 2020 are not necessarily indicative of the results that may be expected for future quarters or for the fiscal year ending June 30, 2021. 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 a privately-held company (the "Corporate Venture") located in China 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 is 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 September 30, 2020 and June 30, 2020, the Company had unamortized deferred gain balance of $2.0 million and $2.0 million, respectively, in accrued liabilities and $0.5 million and $1.0 million, respectively, in other long-term liabilities in the Company’s condensed 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 the parent's related entities and a separate listing for one of its subsidiaries. The Corporate Venture is not itself a restricted party. The Company is working with the Corporate Venture's management to ensure that the Corporate Venture remains in compliance with the new restrictions. The Company does not believe that the equity investment carrying value is impacted as of September 30, 2020. No impairment charge was recorded for the three months ended September 30, 2020 and 2019, respectively. The Company sold products worth $0.6 million and $22.1 million to the Corporate Venture in the three months ended September 30, 2020 and 2019, respectively, and the Company’s share of intra-entity profits on the products that remained unsold by the Corporate Venture in the amounts of $2.3 million and $3.0 million as of September 30, 2020 and June 30, 2020, respectively, 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 $0.6 million and $7.8 million due from the Corporate Venture in accounts receivable, net as of September 30, 2020 and June 30, 2020, respectively. Concentration of Supplier Risk Certain 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. One supplier accounted for 22.0% and 28.7% of total purchases for the three months ended September 30, 2020 and 2019, respectively. Ablecom and Compuware, related parties of the Company (see Note 8, "Related Party Transactions") accounted for 9.8% and 9.7% of total cost of sales for the three months ended September 30, 2020 and 2019, respectively. Concentration of Credit Risk Financial 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. No single customer accounted for 10% or more of the net sales for the three months ended September 30, 2020 and 2019. No customer accounted for greater than 10% of the Company's accounts receivable, net as of September 30, 2020, whereas one customer accounted for 10.1% of accounts receivable, net as of June 30, 2020. 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 condensed 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 condensed consolidated financial statements for the three months ended September 30, 2020. In August 2018, the FASB issued amended guidance, Fair Value Measurement: Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement, 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 September 30, 2020, 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 condensed consolidated financial statements were immaterial. See Note 5 below. 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 condensed 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 adoption of the guidance is not anticipated to have a material impact on its 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 15, 2022. LIBOR is used to calculate the interest on borrowings under the Company's 2018 Bank of America Credit Facility. As the 2018 Bank of America Credit Facility, as amended, will terminate on June 30, 2021 before the phase out of LIBOR, the Company does not expect the adoption of the guidance to have an impact on its consolidated financial statements and disclosures.

Revenue

Revenue	3 Months Ended
	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Revenue	Revenue Disaggregation of Revenue The Company disaggregates revenue by type of product and by 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): Three Months Ended 2020 2019 Server and storage systems $ 617,788 $ 636,026 Subsystems and accessories 144,462 163,778 Total $ 762,250 $ 799,804 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 region to which the products were shipped. The following is a summary for the three months ended September 30, 2020 and 2019, of net sales by geographic region (in thousands): Three Months Ended 2020 2019 United States $ 496,086 $ 468,841 Europe 112,089 128,059 Asia 126,707 161,639 Others 27,368 41,265 $ 762,250 $ 799,804 Starting July 1, 2020, the Company no longer separately discloses 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 condensed 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 the three months ended September 30, 2020, which was included in the opening deferred revenue balance as of June 30, 2020 of $203.8 million, was $28.6 million. Deferred revenue decreased $1.9 million during the three months ended September 30, 2020 because the recognition of revenue from contracts entered into in prior periods was greater than the invoiced amounts for service contracts during the period. Transaction Price Allocated to the Remaining Performance Obligations Remaining performance obligations represent in aggregate the amount of transaction price that has been allocated to performance obligations not delivered, or only partially undelivered, as of the end of the reporting period. The Company applies the optional 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 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 September 30, 2020 was $201.8 million. The Company expects to recognize approximately 52% 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.

Net Income Per Common Share

Net Income Per Common Share	3 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Net Income Per Common Share	Net Income Per Common Share The following table shows the computation of basic and diluted net income per common share for the three months ended September 30, 2020 and 2019 (in thousands, except per share amounts): Three Months Ended 2020 2019 Numerator: Net income $ 26,601 $ 26,345 Denominator: Weighted-average shares outstanding 52,329 50,274 Effect of dilutive securities 2,097 1,430 Weighted-average diluted shares 54,426 51,704 Basic net income per common share $ 0.51 $ 0.52 Diluted net income per common share $ 0.49 $ 0.51 For the three months ended September 30, 2020 and 2019, the Company had stock options, restricted stock units ("RSUs") and performance based restricted stock units ("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 1,177,694 and 3,958,789 for three months ended September 30, 2020, and 2019, respectively.

Balance Sheet Components

Balance Sheet Components	3 Months Ended
	Sep. 30, 2020
Balance Sheet Related Disclosures [Abstract]
Balance Sheet Components	Balance Sheet Components The following tables provide details of the selected balance sheet items (in thousands): Inventories: September 30, 2020 June 30, 2020 Finished goods $ 553,950 $ 656,817 Work in process 68,322 38,146 Purchased parts and raw materials 151,584 156,535 Total inventories $ 773,856 $ 851,498 The Company recorded a (recovery) provision for excess and obsolete inventory to cost of sales totaling $(0.8) million and $10.1 million in the three months ended September 30, 2020 and 2019, respectively. These amounts exclude a provision (recovery) for adjusting the cost of certain inventories to net realizable value of $0.9 million and $(1.8) million for the three months ended September 30, 2020 and 2019, respectively. The recovery is recognized when previously reserved inventories are sold. Prepaid Expenses and Other Current Assets: September 30, 2020 June 30, 2020 Other receivables (1) $ 40,417 $ 94,859 Prepaid income tax 13,846 14,323 Prepaid expenses 5,832 7,075 Deferred service costs 4,431 4,161 Restricted cash 250 250 Others 17,955 6,317 Total prepaid expenses and other current assets $ 82,731 $ 126,985 __________________________ (1) Includes other receivables from contract manufacturers based on certain buy-sell arrangements of $33.6 million and $83.8 million as of September 30, 2020 and June 30, 2020, respectively. Cash, cash equivalents and restricted cash: September 30, 2020 June 30, 2020 Cash and cash equivalents $ 300,089 $ 210,533 Restricted cash included in prepaid expenses and other current assets 250 250 Restricted cash included in other assets 1,613 1,607 Total cash, cash equivalents and restricted cash $ 301,952 $ 212,390 Property, Plant, and Equipment: September 30, 2020 June 30, 2020 Buildings $ 86,930 $ 86,930 Land 75,264 75,251 Machinery and equipment 87,876 85,381 Buildings construction in progress (1) 54,555 46,311 Building and leasehold improvements 24,886 24,517 Software 22,616 20,597 Furniture and fixtures 21,769 21,544 373,896 360,531 Accumulated depreciation and amortization (132,044) (126,746) Property, plant and equipment, net $ 241,852 $ 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 new building in Taiwan. Other Assets: September 30, 2020 June 30, 2020 Operating lease right-of-use asset $ 24,075 $ 23,784 Deferred service costs, non-current 4,828 4,632 Restricted cash, non-current 1,613 1,607 Investment in auction rate security 1,571 1,571 Deposits 1,252 1,201 Non-marketable equity securities 128 128 Prepaid expense, non-current 1,706 1,576 Total other assets $ 35,173 $ 34,499 Accrued Liabilities: September 30, 2020 June 30, 2020 Accrued payroll and related expenses $ 34,059 $ 33,577 Contract manufacturing liabilities 20,366 36,249 Accrued warranty costs 11,057 9,984 Customer deposits 10,306 9,942 Operating lease liability 7,027 6,310 Accrued cooperative marketing expenses 5,818 5,925 Accrued professional fees 2,630 5,661 Accrued legal liabilities (Note 11) — 18,114 Others (accrued liabilities) 30,447 29,639 Total accrued liabilities $ 121,710 $ 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 and the date that the payment is made. 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 and the date that the payment is made. 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. These awards expire in two equal amounts at September 30, 2021 and June 30, 2022 for the two Board members' awards. 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 through 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. As of September 30, 2020 and June 30, 2020, the fair value of these performance bonuses was $2.2 million and $2.1 million, respectively, of which $2.2 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 $2.3 million will be recorded over the remaining service periods from 0.26 years to 0.93 years. The fair value of these awards is remeasured each reporting period. The expense recognized during the three months ended September 30, 2020 and September 30, 2019 was $0.1 million and $0.0 million respectively. Other Long-term Liabilities: September 30, 2020 June 30, 2020 Operating lease liability, non-current $ 17,892 $ 18,102 Accrued unrecognized tax benefits including related interest and penalties 16,067 15,496 Accrued warranty costs, non-current 2,670 2,395 Others 8,078 6,002 Total other long-term liabilities $ 44,707 $ 41,995 Product Warranties: Three Months Ended 2020 2019 Balance, beginning of the period $ 12,379 $ 11,034 Provision for warranty 8,347 5,872 Costs utilized (7,607) (7,662) Change in estimated liability for pre-existing warranties 608 2,041 Balance, end of the period 13,727 11,285 Current portion 11,057 8,655 Non-current portion $ 2,670 $ 2,630

Fair Value Disclosure

Fair Value Disclosure	3 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Fair Value Disclosure	Fair Value Disclosure The 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 September 30, 2020 and June 30, 2020. 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 September 30, 2020. Financial Assets and Liabilities Measured on a Recurring Basis The following table sets forth the Company’s financial instruments as of September 30, 2020 and June 30, 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): September 30, 2020 Level 1 Level 2 Level 3 Asset at Assets Money market funds (1) $ 841 $ — $ — $ 841 Certificates of deposit (2) — 845 — 845 Auction rate security — — 1,571 1,571 Total assets measured at fair value $ 841 $ 845 $ 1,571 $ 3,256 Liabilities Performance awards liability (3) $ — $ 2,196 $ — $ 2,196 Total liabilities measured at fair value $ — $ 2,196 $ — $ 2,196 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 $0.8 million and $0.8 million in money market funds are included in restricted cash, non-current in other assets in the condensed consolidated balance sheets as of September 30, 2020 and June 30, 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 $0.3 million and $0.3 million in certificates of deposit are included in restricted cash, non-current in other assets in the condensed consolidated balance sheets as of September 30, 2020 and June 30, 2020, respectively. (3) As of September 30, 2020 and June 30, 2020, the current portion of the performance awards liability of $2.2 million and $1.5 million, respectively, is included in accrued liabilities and the noncurrent portion of $0.0 million and $0.6 million, respectively, is included in other long-term liabilities in the condensed 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 three months ended September 30, 2020, the credit losses related to the Company’s investments was not significant. 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 September 30, 2020 and June 30, 2020 are as follows: September 30, 2020 Stock Price as of Period End Performance Period Risk-free Rate Volatility Dividend Yield $26.4 1.0 - 1.75 years 0.13% 53.58% —% June 30, 2020 Stock Price as of Period End Performance Period Risk-free Rate Volatility Dividend Yield $28.39 1.25 - 2.0 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 the three months ended September 30, 2020 and 2019. There were no transfers between Level 1, Level 2 or Level 3 financial instruments in the three months ended September 30, 2020 and 2019. The following is a summary of the Company’s investment in an auction rate security as of September 30, 2020 and June 30, 2020 (in thousands): September 30, 2020 and June 30, 2020 Cost Basis Gross Gross Fair Value Auction rate security $ 1,750 $ — $ (179) $ 1,571 No gain or loss was recognized in other comprehensive income for the auction rate security for the three months ended September 30, 2020 and 2019. The Company measures the fair value of outstanding debt for disclosure purposes on a recurring basis. As of September 30, 2020 and June 30, 2020, total debt of $36.0 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.

Short-term and Long-term Debt

Short-term and Long-term Debt	3 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Short-term and Long-term Debt	Short-term and Long-term Debt Short-term debt obligations as of September 30, 2020 and June 30, 2020 consisted of the following (in thousands): September 30, June 30, 2020 2020 CTBC Bank term loan, due August 31, 2021 $ 24,047 $ 23,704 CTBC Bank term loan, due June 4, 2030 11,980 5,697 Total debt 36,027 29,401 Short-term debt and current portion of long-term debt 24,047 23,704 Debt, Non-current $ 11,980 $ 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 (the "2018 Bank of America Credit Facility"), which was amended on May 12, 2020. The Company paid a fee of $0.7 million and entered into a third amendment of the 2018 Bank of America Credit Facility that extended the maturity of the credit facility to June 30, 2021 and changed certain terms of the original agreement. The amendment was accounted for as a modification and the impact was immaterial to the consolidated financial statements. Under the terms of the May 12, 2020 amendment of the 2018 Bank of America Credit Facility, in the event of default or if outstanding borrowings are in excess of $220.0 million, the Company is required to grant the lenders a continuing security interest in and lien upon all amounts credited to any of the Company's deposit accounts. In addition, the amendment released the real property of Super Micro Computer as a collateral. 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 Company is required to pay 0.375% per annum on the 2018 Bank of America Credit Facility for any unused borrowings. 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 September 30, 2020 and June 30, 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 September 30, 2020 and June 30, 2020 were 3.00%. 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 amounts have been drawn under the standby letter of credit. The balance of debt issuance costs outstanding were $0.5 million and $0.6 million as of September 30, 2020 and June 30, 2020, respectively. The Company has been in compliance with all the covenants under the 2018 Bank of America Credit Facility, and as of September 30, 2020, the Company's available borrowing capacity was $243.6 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. 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 $24.0 million and $23.7 million at September 30, 2020 and June 30, 2020, respectively. As of September 30, 2020 and June 30, 2020, the Company did not have any outstanding borrowings under the CTBC Credit Facility revolving line of credit. The interest rate for these loans were 0.73% per annum as of September 30, 2020 and 0.63% per annum as of June 30, 2020. At September 30, 2020, the amount available for future borrowing under the CTBC Credit Facility was $26.0 million. As of September 30, 2020, the net book value of land and building located in Bade, Taiwan, collateralizing the CTBC Credit Facility term loan was $25.3 million. 2020 CTBC Term Loan Facility 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 September 30, 2020 and June 30, 2020, the amounts outstanding under the 2020 CTBC Term Loan Facility were $12.0 million and $5.7 million, respectively. The interest rate for these loans were 0.45% per annum as of September 30, 2020 and June 30, 2020. The net book value of the property serving as collateral as of September 30, 2020 was $17.1 million. As of September 30, 2020, the Company was in compliance with all financial covenants under the 2020 CTBC Term Loan Facility.

Leases

Leases	3 Months Ended
	Sep. 30, 2020
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 three months ended September 30, 2020 and 2019 were as follows (in thousands): Three Months Ended 2020 2019 Operating lease expense (including expense for lease agreements with related parties of $347 and $365 for the three months ended September 30, 2020 and 2019, respectively) $ 2,000 $ 1,709 Cash payments for operating leases (including payments to related parties of $347 and $357 for the three months ended September 30, 2020 and, 2019, respectively) $ 1,966 $ 1,845 During the three months ended September 30, 2020 and 2019, the Company's costs related to short-term lease arrangements for real estate and non-real estate assets were immaterial. Variable payments expensed in the three months ended September 30, 2020 and September 30, 2019 were immaterial. As of September 30, 2020, the weighted average remaining lease term for operating leases was 4.3 years and the weighted average discount rate was 3.5%. Future minimum lease payments under noncancelable operating lease arrangements as of September 30, 2020 were as follows (in thousands): Fiscal Year: Minimum lease payments 2021 $ 5,857 2022 6,492 2023 4,933 2024 4,267 2025 4,354 2026 and beyond 993 Total future lease payments $ 26,896 Less: Imputed interest (1,977) Present value of operating lease liabilities $ 24,919 As of September 30, 2020, 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 8, "Related Party Transactions," for discussion.

Related Party Transactions

Related Party Transactions	3 Months Ended
	Sep. 30, 2020
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 September 30, 2020. Bill Liang, a brother of both Charles Liang and Steve Liang, is a member of the Board of Ablecom. Bill Liang is also the Chief Executive Officer of Compuware, a member of Compuware’s Board and a holder of a significant equity interest in Compuware. Steve Liang is also a member of Compuware’s Board and is an equity holder of Compuware. Charles Liang and 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 93.6% and 92.7% of the chassis included in the products sold by the Company during the three months ended September 30, 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 $11.1 million and $23.2 million at September 30, 2020 and June 30, 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 $21.9 million and $45.7 million at September 30, 2020 and June 30, 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 three months ended September 30, 2020 and 2019, are as follows (in thousands): Three Months Ended 2020 2019 Ablecom Purchases (1) $ 26,324 $ 33,120 Compuware Net sales $ 13,299 $ 5,547 Purchases (1) 38,927 33,316 __________________________ (1) Includes principally purchases of inventory and other miscellaneous items. The Company's net sales to Ablecom were not material for the three months ended September 30, 2020 and 2019. The Company had the following balances related to transactions with Ablecom and Compuware as of September 30, 2020 and June 30, 2020 (in thousands): September 30, 2020 June 30, 2020 Ablecom Accounts receivable and other receivables (1) $ 2,164 $ 6,379 Accounts payable and accrued liabilities (2) 24,901 40,056 Other long-term liabilities (3) 560 513 Compuware Accounts receivable and other receivables (1) $ 6,130 $ 14,323 Accounts payable and accrued liabilities (2) 33,421 46,518 Other long-term liabilities (3) 108 186 ____________________________ (1) Other receivables include receivables from vendors. (2) Includes current portion of operating lease liabilities. (3) Represents non-current portion of operating lease liabilities. See Note 1, "Summary of Significant Accounting Policies" for a discussion of the transactions and balances in the Company’s Corporate Venture.

Stock-based Compensation

Stock-based Compensation	3 Months Ended
	Sep. 30, 2020
Share-based Payment Arrangement [Abstract]
Stock-based Compensation	Stock-based Compensation 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. 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. As of September 30, 2020, the Company had 4,593,009 authorized shares available for future issuance under the 2020 Plan. Share Repurchase Program On August 9, 2020, the Board approved a share repurchase program to repurchase shares of common stock for up to an aggregate of $30.0 million at market prices. The program is 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. 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 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 three months ended September 30, 2020 and 2019 was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions: Three Months Ended 2020 2019 Risk-free interest rate 0.27 % 1.58 % Expected term 5.98 years 6.27 years Dividend yield — % — % Volatility 50.43 % 50.04 % Weighted-average fair value $ 14.16 $ 8.72 The following table shows total stock-based compensation expense included in the condensed consolidated statements of operations for the three months ended September 30, 2020 and 2019 (in thousands): Three Months Ended 2020 2019 Cost of sales $ 503 $ 395 Research and development 3,702 3,130 Sales and marketing 517 436 General and administrative 2,448 1,093 Stock-based compensation expense before taxes 7,170 5,054 Income tax impact (1,955) (1,143) Stock-based compensation expense, net $ 5,215 $ 3,911 As of September 30, 2020, $7.2 million of unrecognized compensation cost related to stock options is expected to be recognized over a weighted-average period of 2.39 years, $39.7 million of unrecognized compensation cost related to unvested RSUs is expected to be recognized over a weighted-average period of 2.56 years and $0.4 million of unrecognized compensation cost related to unvested PRSUs is expected to be recognized over a period of 0.76 years. Stock Option Activity The following table summarizes stock option activity during the three months ended September 30, 2020 under all plans: Options Weighted Weighted Balance as of June 30, 2020 5,379,768 $ 19.38 Granted 207,270 $ 30.43 Exercised (350,830) $ 14.31 Forfeited/Cancelled (21,357) $ 24.42 Balance as of September 30, 2020 5,214,851 $ 20.14 4.20 Options vested and exercisable at September 30, 2020 4,457,311 $ 19.67 3.43 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 if the Company's Chief Executive Officer continued to be employed during those ten quarters. As of September 30, 2020, an additional 45% of the PRSUs vested and 5% are expected to vest in the three months ended December 31, 2020, 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 RSU and PRSU activity during the three months ended September 30, 2020 under all plans: Time-Based RSUs Weighted PRSUs Weighted Balance as of June 30, 2020 1,768,027 $ 20.08 42,000 (1) $ 22.29 Granted 524,357 $ 29.97 — $ — Released (211,519) $ 20.10 (6,000) $ 27.10 Forfeited (57,081) $ 22.98 — $ — Balance as of September 30, 2020 2,023,784 $ 22.55 36,000 $ 21.49 __________________________ (1) Reflects the number of PRSUs that have been earned based on the achievement of performance metrics.

Income Taxes

Income Taxes	3 Months Ended
	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company recorded a provision for income taxes of $3.7 million and $8.6 million for the three months ended September 30, 2020 and 2019, respectively. The effective tax rate was 12.7% and 25.3% for the three months ended September 30, 2020 and 2019, respectively. The effective tax rate for the three months ended September 30, 2020 is lower than that for the three months ended September 30, 2019, primarily due to decrease in tax reserves for uncertain tax positions after settlement of certain tax audits, and increase in the tax benefit related to employees’ stock-based compensation. 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. This tax restructuring does not have a material impact on the estimated annual effective tax rate. 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 and 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 does not have a material impact on the Company. As of September 30, 2020, the Company had gross unrecognized tax benefits of $30.5 million, of which, $14.1 million if recognized, would affect the Company's effective tax rate. During the three months ended September 30, 2020, there was a $3.3 million increase in gross unrecognized tax benefits. The Company’s policy is to include interest and penalties related to unrecognized tax benefits within the provision for taxes on the condensed consolidated statements of operations. As of September 30, 2020, the Company had accrued $2.3 million of interest and penalties relating to unrecognized tax benefits. 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. As a result of the 2017 Tax Reform Act, the Company has determined that its foreign undistributed earnings are indefinitely reinvested except for undistributed earnings related to the Company's operations in the Netherlands. The Company may repatriate certain foreign earnings from the Netherlands that have been previously taxed in the U.S. The tax impact of such repatriation is estimated to be immaterial. In October 2019, the Taiwan tax authority completed its audit in Taiwan for fiscal year 2018 and proposed a transfer pricing adjustment resulting 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 resulting in an 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, 2017 through 2020. Various states statutes of limitations remain open in general for tax years ended June 30, 2016 through 2020. Certain statutes of limitations in major foreign jurisdictions remain open in general for the tax years ended June 30, 2015 through 2020. It is reasonably possible that our gross unrecognized tax benefits will decrease by approximately $1.2 million, in the next 12 months, due to the lapse of the statute of limitations. These adjustments, if recognized, would positively impact our effective tax rate, and would be recognized as additional tax benefits.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Sep. 30, 2020
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 15, 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. The Court has not set a new date for the motion to dismiss hearing, but expects the hearing will be set in late 2020 or early 2021 following completion of supplemental motion to dismiss briefing. The Company believes the claims are without merit and intends to vigorously defend against the lawsuit. 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 condensed 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 September 30, 2020 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 September 30, 2020, these remaining noncancelable commitments were $119.7 million, including $33.1 million for related parties. Standby Letter of Credit — 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. The standby letter of credit is cancellable upon written notice from the issuer. No amounts have been drawn under the standby letter of credit.

Segment Reporting

Segment Reporting	3 Months Ended
	Sep. 30, 2020
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): September 30, June 30, 2020 2020 Long-lived assets: United States $ 179,629 $ 178,812 Asia 59,095 51,605 Europe 3,128 3,368 $ 241,852 $ 233,785 The Company’s revenue is presented on a disaggregated basis in Note 2, “Revenue,” by type of product and by geographical market.

Subsequent Events

Subsequent Events	3 Months Ended
	Sep. 30, 2020
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventsOn 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 “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, 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 plaintiffs seek unspecified compensatory damages and other equitable relief.On October 31, 2020, the Company's Board of Directors approved a share repurchase program to repurchase shares of its common stock for up to $50 million at prevailing prices in the open market. The share repurchase program is effective until October 31, 2021 or until the maximum amount of common stock is repurchased, whichever occurs first.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	The unaudited condensed consolidated financial statements included herein have been prepared by the Company pursuant to the rules and regulations of the United States Securities and Exchange Commission (the “SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principals in the United States of America ("U.S. GAAP") have been condensed or omitted pursuant to such rules and regulations. The unaudited condensed consolidated financial statements included herein reflect all adjustments, including normal recurring adjustments, which are, in the opinion of management, necessary for a fair presentation of the consolidated financial position, results of operations and cash flows for the periods presented. The consolidated results of operations for the three months ended September 30, 2020 are not necessarily indicative of the results that may be expected for future quarters or for the fiscal year ending June 30, 2021.
Investments 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 a privately-held company (the "Corporate Venture") located in China 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 is 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 September 30, 2020 and June 30, 2020, the Company had unamortized deferred gain balance of $2.0 million and $2.0 million, respectively, in accrued liabilities and $0.5 million and $1.0 million, respectively, in other long-term liabilities in the Company’s condensed 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 the parent's related entities and a separate listing for one of its subsidiaries. The Corporate Venture is not itself a restricted party. The Company is working with the Corporate Venture's management to ensure that the Corporate Venture remains in compliance with the new restrictions. The Company does not believe that the equity investment carrying value is impacted as of September 30, 2020. No impairment charge was recorded for the three months ended September 30, 2020 and 2019, respectively. The Company sold products worth $0.6 million and $22.1 million to the Corporate Venture in the three months ended September 30, 2020 and 2019, respectively, and the Company’s share of intra-entity profits on the products that remained unsold by the Corporate Venture in the amounts of $2.3 million and $3.0 million as of September 30, 2020 and June 30, 2020, respectively, 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 $0.6 million and $7.8 million due from the Corporate Venture in accounts receivable, net as of September 30, 2020 and June 30, 2020, respectively.
Concentration of Supplier and Credit Risk	Concentration of Supplier Risk Certain 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. One supplier accounted for 22.0% and 28.7% of total purchases for the three months ended September 30, 2020 and 2019, respectively. Ablecom and Compuware, related parties of the Company (see Note 8, "Related Party Transactions") accounted for 9.8% and 9.7% of total cost of sales for the three months ended September 30, 2020 and 2019, respectively. Concentration of Credit Risk
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 condensed 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 condensed consolidated financial statements for the three months ended September 30, 2020. In August 2018, the FASB issued amended guidance, Fair Value Measurement: Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement, 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 September 30, 2020, 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 condensed consolidated financial statements were immaterial. See Note 5 below. 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 condensed 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 adoption of the guidance is not anticipated to have a material impact on its 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 15, 2022. LIBOR is used to calculate the interest on borrowings under the Company's 2018 Bank of America Credit Facility. As the 2018 Bank of America Credit Facility, as amended, will terminate on June 30, 2021 before the phase out of LIBOR, the Company does not expect the adoption of the guidance to have an impact on its consolidated financial statements and disclosures.

Revenue (Tables)

Revenue (Tables)	3 Months Ended
	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Disaggregation of revenue	The following is a summary of net sales by product type (in thousands): Three Months Ended 2020 2019 Server and storage systems $ 617,788 $ 636,026 Subsystems and accessories 144,462 163,778 Total $ 762,250 $ 799,804 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 region to which the products were shipped. The following is a summary for the three months ended September 30, 2020 and 2019, of net sales by geographic region (in thousands): Three Months Ended 2020 2019 United States $ 496,086 $ 468,841 Europe 112,089 128,059 Asia 126,707 161,639 Others 27,368 41,265 $ 762,250 $ 799,804

Net Income Per Common Share (Ta

Net Income Per Common Share (Tables)	3 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Computation of basic and diluted net income per share	The following table shows the computation of basic and diluted net income per common share for the three months ended September 30, 2020 and 2019 (in thousands, except per share amounts): Three Months Ended 2020 2019 Numerator: Net income $ 26,601 $ 26,345 Denominator: Weighted-average shares outstanding 52,329 50,274 Effect of dilutive securities 2,097 1,430 Weighted-average diluted shares 54,426 51,704 Basic net income per common share $ 0.51 $ 0.52 Diluted net income per common share $ 0.49 $ 0.51

Balance Sheet Components (Table

Balance Sheet Components (Tables)	3 Months Ended
	Sep. 30, 2020
Balance Sheet Related Disclosures [Abstract]
Schedule of inventories	The following tables provide details of the selected balance sheet items (in thousands): Inventories: September 30, 2020 June 30, 2020 Finished goods $ 553,950 $ 656,817 Work in process 68,322 38,146 Purchased parts and raw materials 151,584 156,535 Total inventories $ 773,856 $ 851,498
Schedule of prepaid expenses and other current assets	Prepaid Expenses and Other Current Assets: September 30, 2020 June 30, 2020 Other receivables (1) $ 40,417 $ 94,859 Prepaid income tax 13,846 14,323 Prepaid expenses 5,832 7,075 Deferred service costs 4,431 4,161 Restricted cash 250 250 Others 17,955 6,317 Total prepaid expenses and other current assets $ 82,731 $ 126,985 __________________________
Schedule of cash, cash equivalents and restricted cash	Cash, cash equivalents and restricted cash: September 30, 2020 June 30, 2020 Cash and cash equivalents $ 300,089 $ 210,533 Restricted cash included in prepaid expenses and other current assets 250 250 Restricted cash included in other assets 1,613 1,607 Total cash, cash equivalents and restricted cash $ 301,952 $ 212,390
Schedule of property, plant, and equipment	Property, Plant, and Equipment: September 30, 2020 June 30, 2020 Buildings $ 86,930 $ 86,930 Land 75,264 75,251 Machinery and equipment 87,876 85,381 Buildings construction in progress (1) 54,555 46,311 Building and leasehold improvements 24,886 24,517 Software 22,616 20,597 Furniture and fixtures 21,769 21,544 373,896 360,531 Accumulated depreciation and amortization (132,044) (126,746) Property, plant and equipment, net $ 241,852 $ 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 new building in Taiwan.
Schedule of other assets	Other Assets: September 30, 2020 June 30, 2020 Operating lease right-of-use asset $ 24,075 $ 23,784 Deferred service costs, non-current 4,828 4,632 Restricted cash, non-current 1,613 1,607 Investment in auction rate security 1,571 1,571 Deposits 1,252 1,201 Non-marketable equity securities 128 128 Prepaid expense, non-current 1,706 1,576 Total other assets $ 35,173 $ 34,499
Schedule of accrued liabilities	Accrued Liabilities: September 30, 2020 June 30, 2020 Accrued payroll and related expenses $ 34,059 $ 33,577 Contract manufacturing liabilities 20,366 36,249 Accrued warranty costs 11,057 9,984 Customer deposits 10,306 9,942 Operating lease liability 7,027 6,310 Accrued cooperative marketing expenses 5,818 5,925 Accrued professional fees 2,630 5,661 Accrued legal liabilities (Note 11) — 18,114 Others (accrued liabilities) 30,447 29,639 Total accrued liabilities $ 121,710 $ 155,401
Schedule of other long-term liabilities	Other Long-term Liabilities: September 30, 2020 June 30, 2020 Operating lease liability, non-current $ 17,892 $ 18,102 Accrued unrecognized tax benefits including related interest and penalties 16,067 15,496 Accrued warranty costs, non-current 2,670 2,395 Others 8,078 6,002 Total other long-term liabilities $ 44,707 $ 41,995
Reconciliation of the changes in accrued warranty costs	Product Warranties: Three Months Ended 2020 2019 Balance, beginning of the period $ 12,379 $ 11,034 Provision for warranty 8,347 5,872 Costs utilized (7,607) (7,662) Change in estimated liability for pre-existing warranties 608 2,041 Balance, end of the period 13,727 11,285 Current portion 11,057 8,655 Non-current portion $ 2,670 $ 2,630

Fair Value Disclosure (Tables)

Fair Value Disclosure (Tables)	3 Months Ended
	Sep. 30, 2020
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 September 30, 2020 and June 30, 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): September 30, 2020 Level 1 Level 2 Level 3 Asset at Assets Money market funds (1) $ 841 $ — $ — $ 841 Certificates of deposit (2) — 845 — 845 Auction rate security — — 1,571 1,571 Total assets measured at fair value $ 841 $ 845 $ 1,571 $ 3,256 Liabilities Performance awards liability (3) $ — $ 2,196 $ — $ 2,196 Total liabilities measured at fair value $ — $ 2,196 $ — $ 2,196 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 $0.8 million and $0.8 million in money market funds are included in restricted cash, non-current in other assets in the condensed consolidated balance sheets as of September 30, 2020 and June 30, 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 $0.3 million and $0.3 million in certificates of deposit are included in restricted cash, non-current in other assets in the condensed consolidated balance sheets as of September 30, 2020 and June 30, 2020, respectively.
Summary of significant inputs for estimating fair value	The significant inputs used in estimating the fair value of the awards as of September 30, 2020 and June 30, 2020 are as follows: September 30, 2020 Stock Price as of Period End Performance Period Risk-free Rate Volatility Dividend Yield $26.4 1.0 - 1.75 years 0.13% 53.58% —% June 30, 2020 Stock Price as of Period End Performance Period Risk-free Rate Volatility Dividend Yield $28.39 1.25 - 2.0 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 September 30, 2020 and June 30, 2020 (in thousands): September 30, 2020 and June 30, 2020 Cost Basis Gross Gross Fair Value Auction rate security $ 1,750 $ — $ (179) $ 1,571

Short-term and Long-term Debt (

Short-term and Long-term Debt (Tables)	3 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Schedule of short-term and long-term debt obligations	Short-term debt obligations as of September 30, 2020 and June 30, 2020 consisted of the following (in thousands): September 30, June 30, 2020 2020 CTBC Bank term loan, due August 31, 2021 $ 24,047 $ 23,704 CTBC Bank term loan, due June 4, 2030 11,980 5,697 Total debt 36,027 29,401 Short-term debt and current portion of long-term debt 24,047 23,704 Debt, Non-current $ 11,980 $ 5,697

Leases (Tables)

Leases (Tables)	3 Months Ended
	Sep. 30, 2020
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 three months ended September 30, 2020 and 2019 were as follows (in thousands): Three Months Ended 2020 2019 Operating lease expense (including expense for lease agreements with related parties of $347 and $365 for the three months ended September 30, 2020 and 2019, respectively) $ 2,000 $ 1,709 Cash payments for operating leases (including payments to related parties of $347 and $357 for the three months ended September 30, 2020 and, 2019, respectively) $ 1,966 $ 1,845
Summary of future minimum lease payments under noncancelable operating lease arrangements	Future minimum lease payments under noncancelable operating lease arrangements as of September 30, 2020 were as follows (in thousands): Fiscal Year: Minimum lease payments 2021 $ 5,857 2022 6,492 2023 4,933 2024 4,267 2025 4,354 2026 and beyond 993 Total future lease payments $ 26,896 Less: Imputed interest (1,977) Present value of operating lease liabilities $ 24,919

Related Party Transactions (Tab

Related Party Transactions (Tables)	3 Months Ended
	Sep. 30, 2020
Related Party Transactions [Abstract]
Schedule of related party transactions	The Company’s results from transactions with Ablecom and Compuware for each of the three months ended September 30, 2020 and 2019, are as follows (in thousands): Three Months Ended 2020 2019 Ablecom Purchases (1) $ 26,324 $ 33,120 Compuware Net sales $ 13,299 $ 5,547 Purchases (1) 38,927 33,316 __________________________ (1) Includes principally purchases of inventory and other miscellaneous items. The Company's net sales to Ablecom were not material for the three months ended September 30, 2020 and 2019. The Company had the following balances related to transactions with Ablecom and Compuware as of September 30, 2020 and June 30, 2020 (in thousands): September 30, 2020 June 30, 2020 Ablecom Accounts receivable and other receivables (1) $ 2,164 $ 6,379 Accounts payable and accrued liabilities (2) 24,901 40,056 Other long-term liabilities (3) 560 513 Compuware Accounts receivable and other receivables (1) $ 6,130 $ 14,323 Accounts payable and accrued liabilities (2) 33,421 46,518 Other long-term liabilities (3) 108 186 ____________________________ (1) Other receivables include receivables from vendors. (2) Includes current portion of operating lease liabilities.

Stock-based Compensation (Table

Stock-based Compensation (Tables)	3 Months Ended
	Sep. 30, 2020
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 three months ended September 30, 2020 and 2019 was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions: Three Months Ended 2020 2019 Risk-free interest rate 0.27 % 1.58 % Expected term 5.98 years 6.27 years Dividend yield — % — % Volatility 50.43 % 50.04 % Weighted-average fair value $ 14.16 $ 8.72
Schedule of stock-based compensation expense	The following table shows total stock-based compensation expense included in the condensed consolidated statements of operations for the three months ended September 30, 2020 and 2019 (in thousands): Three Months Ended 2020 2019 Cost of sales $ 503 $ 395 Research and development 3,702 3,130 Sales and marketing 517 436 General and administrative 2,448 1,093 Stock-based compensation expense before taxes 7,170 5,054 Income tax impact (1,955) (1,143) Stock-based compensation expense, net $ 5,215 $ 3,911
Summary of stock option activity	The following table summarizes stock option activity during the three months ended September 30, 2020 under all plans: Options Weighted Weighted Balance as of June 30, 2020 5,379,768 $ 19.38 Granted 207,270 $ 30.43 Exercised (350,830) $ 14.31 Forfeited/Cancelled (21,357) $ 24.42 Balance as of September 30, 2020 5,214,851 $ 20.14 4.20 Options vested and exercisable at September 30, 2020 4,457,311 $ 19.67 3.43
Summary of restricted stock unit activity	The following table summarizes RSU and PRSU activity during the three months ended September 30, 2020 under all plans: Time-Based RSUs Weighted PRSUs Weighted Balance as of June 30, 2020 1,768,027 $ 20.08 42,000 (1) $ 22.29 Granted 524,357 $ 29.97 — $ — Released (211,519) $ 20.10 (6,000) $ 27.10 Forfeited (57,081) $ 22.98 — $ — Balance as of September 30, 2020 2,023,784 $ 22.55 36,000 $ 21.49 __________________________ (1) Reflects the number of PRSUs that have been earned based on the achievement of performance metrics.

Segment Reporting (Tables)

Segment Reporting (Tables)	3 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Summary of property, plant and equipment	The following is a summary of property, plant and equipment, net (in thousands): September 30, June 30, 2020 2020 Long-lived assets: United States $ 179,629 $ 178,812 Asia 59,095 51,605 Europe 3,128 3,368 $ 241,852 $ 233,785

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Narrative (Details)	3 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020
Supplier concentration risk | Purchases, Total
Concentration Risk [Line Items]
Concentration risk percentage	22.00%	28.70%
Supplier concentration risk | Purchases | Ablecom Technology
Concentration Risk [Line Items]
Concentration risk percentage	9.80%
Supplier concentration risk | Purchases | Compuware
Concentration Risk [Line Items]
Concentration risk percentage		9.70%
Customer concentration risk | Accounts receivable | One customer
Concentration Risk [Line Items]
Concentration risk percentage			10.10%

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Investment in a Corporate Venture (Details) - USD ($)	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020	Sep. 30, 2017
Schedule of Equity Method Investments [Line Items]
Equity method investment, other than temporary impairment	$ 0	$ 0
Cost of revenue	632,335,000	668,875,000
Current assets	1,479,521,000		$ 1,592,761,000
Corporate Venture
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage				30.00%
Cost of revenue	600,000	$ 22,100,000
Accrued liabilities	2,300,000		3,000,000
Current assets	600,000		7,800,000
Investor in China | Corporate Venture
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage				70.00%
Accrued Liabilities | Corporate Venture
Schedule of Equity Method Investments [Line Items]
Equity method investment, unamortized deferred gain from sale	2,000,000		2,000,000
Long-Term Liabilities | Corporate Venture
Schedule of Equity Method Investments [Line Items]
Equity method investment, unamortized deferred gain from sale	$ 500,000		$ 1,000,000

Revenue - Summary of Net Sales

Revenue - Summary of Net Sales by Product Type (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 762,250	$ 799,804
Server and storage systems
Disaggregation of Revenue [Line Items]
Net sales	617,788	636,026
Subsystems and accessories
Disaggregation of Revenue [Line Items]
Net sales	$ 144,462	$ 163,778

Revenue - Summary of Net Sale_2

Revenue - Summary of Net Sales by Location (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 762,250	$ 799,804
United States
Disaggregation of Revenue [Line Items]
Net sales	496,086	468,841
Europe
Disaggregation of Revenue [Line Items]
Net sales	112,089	128,059
Asia
Disaggregation of Revenue [Line Items]
Net sales	126,707	161,639
Others
Disaggregation of Revenue [Line Items]
Net sales	$ 27,368	$ 41,265

Revenue - Contract Balances Nar

Revenue - Contract Balances Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020
Revenue from Contract with Customer [Abstract]
Deferred revenue		$ 203.8
Contract with customer liability, revenue recognized in the period	$ 28.6
Decrease in deferred revenue	$ (1.9)

Revenue - Performance Obligatio

Revenue - Performance Obligation (Details) $ in Millions	Sep. 30, 2020USD ($)
Revenue from Contract with Customer [Abstract]
Remaining revenue performance obligation, amount	$ 201.8
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining revenue performance obligation, percent to be recognized	52.00%
Remaining performance obligation, expected timing of satisfaction, period	12 months

Net Income Per Common Share (De

Net Income Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Numerator:
Net income	$ 26,601	$ 26,345
Denominator:
Weighted-average shares outstanding (in shares)	52,329,000	50,274,000
Effect of dilutive securities (in shares)	2,097,000	1,430,000
Weighted-average diluted shares (in shares)	54,426,000	51,704,000
Basic net income per share (in dollars per share)	$ 0.51	$ 0.52
Diluted net income per share (in dollars per share)	$ 0.49	$ 0.51
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)	1,177,694	3,958,789

Balance Sheet Components - Inve

Balance Sheet Components - Inventories (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020
Inventory, Net [Abstract]
Finished goods	$ 553,950		$ 656,817
Work in process	68,322		38,146
Purchased parts and raw materials	151,584		156,535
Total inventories	773,856		$ 851,498
Provision for excess and obsolete inventory	(800)	$ 10,100
Write-down to net realizable value	$ 900	$ (1,800)

Balance Sheet Components - Prep

Balance Sheet Components - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Prepaid Expense and Other Current Assets [Abstract]
Other receivables	$ 40,417	$ 94,859
Prepaid income tax	13,846	14,323
Prepaid expenses	5,832	7,075
Deferred service costs	4,431	4,161
Restricted cash	250	250
Others	17,955	6,317
Total prepaid expenses and other current assets	82,731	126,985
Receivables from contract manufacturers, buy-sell arrangement	$ 33,600	$ 83,800

Balance Sheet Components - Cash

Balance Sheet Components - Cash, Cash Equivalents, Restricted Cash (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Jun. 30, 2019
Balance Sheet Related Disclosures [Abstract]
Cash and cash equivalents	$ 300,089	$ 210,533
Restricted cash included in prepaid expenses and other current assets	250	250
Restricted cash included in other assets	1,613	1,607
Total cash, cash equivalents and restricted cash	$ 301,952	$ 212,390	$ 252,622	$ 262,140

Balance Sheet Components - Prop

Balance Sheet Components - Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 373,896	$ 360,531
Accumulated depreciation and amortization	(132,044)	(126,746)
Property, plant and equipment, net	241,852	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	75,264	75,251
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	87,876	85,381
Buildings construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	54,555	46,311
Building and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	24,886	24,517
Software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	22,616	20,597
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 21,769	$ 21,544

Balance Sheet Components - Othe

Balance Sheet Components - Other Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Other Assets [Abstract]
Operating lease right-of-use asset	$ 24,075	$ 23,784
Deferred service costs, non-current	4,828	4,632
Restricted cash, non-current	1,613	1,607
Investment in auction rate security	1,571	1,571
Deposits	1,252	1,201
Non-marketable equity securities	128	128
Prepaid expense, non-current	1,706	1,576
Total other assets	$ 35,173	$ 34,499

Balance Sheet Components - Accr

Balance Sheet Components - Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019
Accrued Liabilities [Abstract]
Accrued payroll and related expenses	$ 34,059	$ 33,577
Contract manufacturing liabilities	20,366	36,249
Accrued warranty costs	11,057	9,984	$ 8,655
Customer deposits	10,306	9,942
Operating lease liability	7,027	6,310
Accrued cooperative marketing expenses	5,818	5,925
Accrued professional fees	2,630	5,661
Accrued legal liabilities (Note 11)	0	18,114
Others (accrued liabilities)	30,447	29,639
Operating lease liability	$ 121,710	$ 155,401

Balance Sheet Components - Perf

Balance Sheet Components - Performance Awards Liability (Details) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended
	Mar. 31, 2020USD ($)dayboard_membertranche$ / shares	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Jun. 30, 2020USD ($)
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Number of Board Members, performance awards | board_member	2
Accrued bonuses		$ 2,200		$ 2,100
Unrecognized bonus compensation expense		2,300
Bonus compensation expense		$ 100	$ 0
Chief Executive Officer
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Performance bonuses approved	$ 8,100
Performance bonus, number of tranches | tranche	2
Percent of bonus subject to performance condition	50.00%
Stock price threshold to earn bonus, tranche one (USD 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 (USD per share) | $ / shares	$ 32.99
Senior Executive
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Performance bonuses approved	$ 100
Two Board Of Director Members
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Performance bonuses approved	$ 300
Performance bonus, number of tranches | tranche	2
Stock price threshold to earn bonus, tranche one (USD per share) | $ / shares	$ 31.61
Stock price threshold to earn bonus, tranche two (USD per share) | $ / shares	$ 32.99
Minimum
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Unrecognized bonus compensation expense, period		3 months 3 days
Maximum
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Unrecognized bonus compensation expense, period		11 months 4 days
Accrued Liabilities
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Accrued bonuses		$ 2,200		1,500
Other Long-Term Liabilities
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Accrued bonuses		$ 0		$ 600

Balance Sheet Components - Ot_2

Balance Sheet Components - Other Long-Term Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019
Other Long-term Liabilities [Abstract]
Operating lease liability, non-current	$ 17,892	$ 18,102
Accrued unrecognized tax benefits including related interest and penalties	16,067	15,496
Accrued warranty costs, non-current	2,670	2,395	$ 2,630
Others	8,078	6,002
Total other long-term liabilities	$ 44,707	$ 41,995

Balance Sheet Components - Prod

Balance Sheet Components - Product Warranties (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020
Product Warranties:
Balance, beginning of the period	$ 12,379	$ 11,034
Provision for warranty	8,347	5,872
Costs utilized	(7,607)	(7,662)
Change in estimated liability for pre-existing warranties	608	2,041
Balance, end of the period	13,727	11,285
Current portion	11,057	8,655	$ 9,984
Non-current portion	$ 2,670	$ 2,630	$ 2,395

Fair Value Disclosure - Cash Eq

Fair Value Disclosure - Cash Equivalents and Long-term Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Other Long-Term Liabilities
Liabilities, Fair Value Disclosure [Abstract]
Performance awards liability, current	$ 0
Auction rate security
Asset at Fair Value
Auction rate security	1,571	$ 1,571
Fair Value, Measurements, Recurring
Asset at Fair Value
Total assets measured at fair value	3,256	3,570
Liabilities, Fair Value Disclosure [Abstract]
Performance awards liability, current	2,196	2,100
Total liabilities measured at fair value	2,196	2,100
Fair Value, Measurements, Recurring | Auction rate security
Asset at Fair Value
Auction rate security	1,571	1,571
Fair Value, Measurements, Recurring | Level 1
Asset at Fair Value
Total assets measured at fair value	841	1,163
Liabilities, Fair Value Disclosure [Abstract]
Performance awards liability, current	0	0
Total liabilities measured at fair value	0	0
Fair Value, Measurements, Recurring | Level 1 | Auction rate security
Asset at Fair Value
Auction rate security	0	0
Fair Value, Measurements, Recurring | Level 2
Asset at Fair Value
Total assets measured at fair value	845	836
Liabilities, Fair Value Disclosure [Abstract]
Performance awards liability, current	2,196	2,100
Total liabilities measured at fair value	2,196	2,100
Fair Value, Measurements, Recurring | Level 2 | Auction rate security
Asset at Fair Value
Auction rate security	0	0
Fair Value, Measurements, Recurring | Level 3
Asset at Fair Value
Total assets measured at fair value	1,571	1,571
Liabilities, Fair Value Disclosure [Abstract]
Performance awards liability, current	0	0
Total liabilities measured at fair value	0	0
Fair Value, Measurements, Recurring | Level 3 | Auction rate security
Asset at Fair Value
Auction rate security	1,571	1,571
Money Market Funds
Asset at Fair Value
Cash and cash equivalents	0	400
Liabilities, Fair Value Disclosure [Abstract]
Restricted cash and equivalents	800	800
Money Market Funds | Fair Value, Measurements, Recurring
Asset at Fair Value
Cash and cash equivalents	841	1,163
Money Market Funds | Fair Value, Measurements, Recurring | Level 1
Asset at Fair Value
Cash and cash equivalents	841	1,163
Money Market Funds | Fair Value, Measurements, Recurring | Level 2
Asset at Fair Value
Cash and cash equivalents	0	0
Money Market Funds | Fair Value, Measurements, Recurring | Level 3
Asset at Fair Value
Cash and cash equivalents	0	0
Certificates of Deposit
Asset at Fair Value
Cash and cash equivalents	200	200
Liabilities, Fair Value Disclosure [Abstract]
Restricted cash and equivalents	300	300
Prepaid expense and other assets	300	300
Certificates of Deposit | Fair Value, Measurements, Recurring
Asset at Fair Value
Cash and cash equivalents	845	836
Certificates of Deposit | Fair Value, Measurements, Recurring | Level 1
Asset at Fair Value
Cash and cash equivalents	0	0
Certificates of Deposit | Fair Value, Measurements, Recurring | Level 2
Asset at Fair Value
Cash and cash equivalents	845	836
Certificates of Deposit | Fair Value, Measurements, Recurring | Level 3
Asset at Fair Value
Cash and cash equivalents	$ 0	$ 0

Fair Value Disclosure - Summary

Fair Value Disclosure - Summary of Significant Inputs for Estimating Fair Value (Details) - Performance Shares - $ / shares	3 Months Ended	12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stock Price as of Period End (USD per share)	$ 26.4	$ 28.39
Risk-free Rate	0.13%	0.16%
Volatility	53.58%	53.75%
Dividend yield	0.00%	0.00%
Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Performance Period	1 year	1 year 3 months
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Performance Period	1 year 9 months	2 years

Fair Value Disclosure - Long-te

Fair Value Disclosure - Long-term Investments (Details) - Auction rate security - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Cost Basis	$ 1,750	$ 1,750
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	(179)	(179)
Fair Value	$ 1,571	$ 1,571

Fair Value Disclosure - Narrati

Fair Value Disclosure - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2020	Jun. 30, 2020
Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of debt outstanding	$ 36	$ 29.4

Short-term and Long-term Debt -

Short-term and Long-term Debt - Schedule of Short-Term Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Short-term Debt [Line Items]
Short-term debt	$ 24,047	$ 23,704
Long-term debt, net of debt issuance costs	11,980	5,697
Total debt	36,027	29,401
Short-term debt and current portion of long-term debt	24,047	23,704
Debt, Non-current	11,980	5,697
Secured debt | CTBC Bank term loan, due June 4, 2030 | Term loan
Short-term Debt [Line Items]
Long-term debt, net of debt issuance costs	$ 11,980	$ 5,697

Short-term and Long-term Debt_2

Short-term and Long-term Debt - 2018 Bank of America Credit Facility (Details) - USD ($)	May 12, 2020	Sep. 30, 2020	Jun. 30, 2020	Oct. 31, 2019	Oct. 31, 2018
Short-term Debt [Line Items]
Short-term debt		$ 24,047,000	$ 23,704,000
Bank of America | Bank of America 2018 Credit Agreement
Short-term Debt [Line Items]
Interest rate (as a percent)		3.00%	3.00%
Revolving Credit Facility | Bank of America | Line of Credit | Bank of America 2018 Credit Agreement
Short-term Debt [Line Items]
Amendment fee paid	$ 700,000
Line of credit facility, covenant threshold, amount outstanding	$ 220,000,000
Line of credit facility, unused capacity, commitment fee percentage	0.375%
Short-term debt		$ 0	$ 0
Debt issuance costs		500,000	$ 600,000
Credit facility, remaining borrowing capacity		243,600,000
Revolving Credit Facility | Bank of America | Standby Letters of Credit | Bank of America 2018 Credit Agreement
Short-term Debt [Line Items]
Credit facility, maximum borrowing capacity				$ 6,400,000	$ 3,200,000
Letters of credit outstanding		$ 0

Short-term and Long-term Debt_3

Short-term and Long-term Debt - CTBC Bank (Details)	1 Months Ended
	Jun. 30, 2020USD ($)	May 31, 2020USD ($)	Jun. 30, 2019USD ($)	Sep. 30, 2020USD ($)	May 31, 2020TWD ($)	Jun. 30, 2019TWD ($)
Short-term Debt [Line Items]
Short-term debt	$ 23,704,000			$ 24,047,000
Long-term debt, net of debt issuance costs	5,697,000			11,980,000
Secured debt | Term loan | CTBC Bank term loan, due August 31, 2021
Short-term Debt [Line Items]
Short-term debt	23,704,000			24,047,000
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, net of debt issuance costs	$ 0			$ 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
Interest rate (as a percent)				0.45%
Collateral amount				$ 17,100,000
Percent of balances owed on commercial invoices, limitation on proceeds amount		80.00%			80.00%
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]
Credit facility, remaining borrowing capacity				26,000,000
Collateral amount				$ 25,300,000
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 [Member] | 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 [Member] | 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 | 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 | CTBC Bank
Short-term Debt [Line Items]
Interest rate (as a percent)	0.63%			0.73%
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 | CTBC Bank term loan, due June 4, 2030
Short-term Debt [Line Items]
Long-term debt, net of debt issuance costs	$ 5,697,000			$ 11,980,000

Leases - Narrative (Details)

Leases - Narrative (Details)	Sep. 30, 2020
Leases [Abstract]
Operating lease, weighted average remaining lease term	4 years 3 months 18 days
Incremental borrowing rate	3.50%

Leases - Summary of Lease Costs

Leases - Summary of Lease Costs and Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Related Party Transaction [Line Items]
Operating lease expense (including expense for lease agreements with related parties of $347 and $365 for the three months ended September 30, 2020 and 2019, respectively)	$ 2,000	$ 1,709
Cash payments for operating leases (including payments to related parties of $347 and $357 for the three months ended September 30, 2020 and, 2019, respectively)	1,966	1,845
Affiliated
Related Party Transaction [Line Items]
Operating lease expense (including expense for lease agreements with related parties of $347 and $365 for the three months ended September 30, 2020 and 2019, respectively)	347	365
Cash payments for operating leases (including payments to related parties of $347 and $357 for the three months ended September 30, 2020 and, 2019, respectively)	$ 347	$ 357

Leases - Future Minimum Operati

Leases - Future Minimum Operating Liability Payments (Details) $ in Thousands	Sep. 30, 2020USD ($)
Leases [Abstract]
2021	$ 5,857
2022	6,492
2023	4,933
2024	4,267
2025	4,354
2026 and beyond	993
Total future lease payments	26,896
Less: Imputed interest	(1,977)
Present value of operating lease liabilities	$ 24,919

Related Party Transactions - Na

Related Party Transactions - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020
Related Party Transaction [Line Items]
Outstanding purchase order	$ 119.7
Affiliated
Related Party Transaction [Line Items]
Outstanding purchase order	$ 33.1
Ablecom Technology
Related Party Transaction [Line Items]
Related party, product sold percent	93.60%	92.70%
Ablecom Technology | Affiliated
Related Party Transaction [Line Items]
Outstanding purchase order	$ 11.1		$ 23.2
Ablecom Technology | Charles Liang and wife | Investee
Related Party Transaction [Line Items]
Ownership percentage	10.50%
Ablecom Technology | Steve Liang and other family members | Management and immediate family member of management
Related Party Transaction [Line Items]
Ownership percentage	28.80%
Compuware
Related Party Transaction [Line Items]
Outstanding purchase order	$ 21.9		$ 45.7

Related Party Transactions - Tr

Related Party Transactions - Transactions (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020
Related Party Transaction [Line Items]
Revenue from Related Parties	$ 13,899	$ 27,662
Related Party Transaction, Purchases from Related Party	62,199	65,033
Other long-term liabilities, related parties	1,169		$ 1,699
Affiliated | Ablecom Technology
Related Party Transaction [Line Items]
Related Party Transaction, Purchases from Related Party	26,324	33,120
Accounts receivable and other receivables	2,164		6,379
Accounts payable and accrued liabilities	24,901		40,056
Other long-term liabilities, related parties	560		513
Affiliated | Compuware
Related Party Transaction [Line Items]
Revenue from Related Parties	13,299	5,547
Related Party Transaction, Purchases from Related Party	38,927	$ 33,316
Accounts receivable and other receivables	6,130		14,323
Accounts payable and accrued liabilities	33,421		46,518
Other long-term liabilities, related parties	$ 108		$ 186

Stock-based Compensation - Equi

Stock-based Compensation - Equity Incentive Plan Narrative (Details) - shares	Sep. 30, 2020	Jun. 30, 2020	Jun. 05, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for outstanding awards	5,214,851	5,379,768
Equity Incentive Plan, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards authorized (in shares)			5,000,000
Shares reserved for future issuance (in shares)			1,045,000
Authorized shares available for future issuance (in shares)	4,593,009
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			7,246,000

Stock-based Compensation - Shar

Stock-based Compensation - Share Repurchase Program Narrative (Details) - USD ($)	3 Months Ended
	Sep. 30, 2020	Aug. 09, 2020
Share-based Payment Arrangement [Abstract]
Stock repurchase program, authorized amount		$ 30,000,000
Treasury shares acquired (in shares)	1,142,294
Treasury shares acquired, value	$ 30,000,000

Stock-based Compensation - Fair

Stock-based Compensation - Fair Value Assumptions and Expense (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Share-based Payment Arrangement, Additional Disclosure [Abstract]
Stock-based compensation expense before taxes	$ 7,170	$ 5,054
Income tax impact	(1,955)	(1,143)
Stock-based compensation expense, net	$ 5,215	$ 3,911
Employee stock option
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Risk-free interest rate	0.27%	1.58%
Expected term	5 years 11 months 23 days	6 years 3 months 7 days
Dividend yield	0.00%	0.00%
Volatility	50.43%	50.04%
Weighted-average fair value (in dollars per share)	$ 14.16	$ 8.72
Share-based Payment Arrangement, Additional Disclosure [Abstract]
Unrecognized compensation cost related to non-vested stock-based awards	$ 7,200
Unrecognized compensation cost related to non-vested stock based awards, period for recognition (in years)	2 years 4 months 20 days
Restricted stock units (RSUs)
Share-based Payment Arrangement, Additional Disclosure [Abstract]
Unrecognized compensation cost related to non-vested stock-based awards	$ 39,700
Unrecognized compensation cost related to non-vested stock based awards, period for recognition (in years)	2 years 6 months 21 days
Performance-Based Restricted Stock Units (PRSUs)
Share-based Payment Arrangement, Additional Disclosure [Abstract]
Unrecognized compensation cost related to non-vested stock-based awards	$ 400
Unrecognized compensation cost related to non-vested stock based awards, period for recognition (in years)	9 months 3 days
Cost of sales
Share-based Payment Arrangement, Additional Disclosure [Abstract]
Stock-based compensation expense before taxes	$ 503	$ 395
Research and development
Share-based Payment Arrangement, Additional Disclosure [Abstract]
Stock-based compensation expense before taxes	3,702	3,130
Sales and marketing
Share-based Payment Arrangement, Additional Disclosure [Abstract]
Stock-based compensation expense before taxes	517	436
General and administrative
Share-based Payment Arrangement, Additional Disclosure [Abstract]
Stock-based compensation expense before taxes	$ 2,448	$ 1,093

Stock-based Compensation - Stoc

Stock-based Compensation - Stock Option Activity (Details)	3 Months Ended
	Sep. 30, 2020$ / sharesshares
Options Outstanding
Balance at beginning of period (in shares) | shares	5,379,768
Granted (in shares) | shares	207,270
Exercised (in shares) | shares	(350,830)
Forfeited/Cancelled (in shares) | shares	(21,357)
Balance at end of period (in shares) | shares	5,214,851
Options vested and exercisable (in shares) | shares	4,457,311
Weighted Average Exercise Price per Share
Balance at beginning of period (in dollars per share) | $ / shares	$ 19.38
Granted (in dollars per share) | $ / shares	30.43
Exercised (in dollars per share) | $ / shares	14.31
Forfeited/Cancelled (in dollars per share) | $ / shares	24.42
Balance at end of period (in dollars per share) | $ / shares	20.14
Options vested and exercisable (in dollars per share) | $ / shares	$ 19.67
Weighted Average Remaining Contractual Term and Aggregate Intrinsic Value
Weighted average remaining contractual term, options outstanding (in years)	4 years 2 months 12 days
Weighted average remaining contractual term, options vested and exercisable (in years)	3 years 5 months 4 days

Stock-based Compensation - RSU

Stock-based Compensation - RSU and PRSU Activity Narrative (Details) - shares	1 Months Ended		3 Months Ended
	Mar. 31, 2020	Aug. 31, 2017	Dec. 31, 2020	Sep. 30, 2020
Forecast
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option and restricted stock units vesting rights, percentage			5.00%
Performance-Based Restricted Stock Units (PRSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards authorized (in shares)		2
Number of units per vesting tranche (in shares)	15,000
Units earned in period (in shares)				0
Performance-Based Restricted Stock Units (PRSUs), One-Year | Year one
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option and restricted stock units vesting rights, percentage		50.00%		45.00%
Performance-Based Restricted Stock Units (PRSUs), One-Year | Quarterly
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option and restricted stock units vesting rights, percentage		5.00%
Vesting period		30 months

Stock-based Compensation - RS_2

Stock-based Compensation - RSU and PRSU Activity (Details)	3 Months Ended
	Sep. 30, 2020$ / sharesshares
Restricted stock units (RSUs)
Time-Based RSUs Outstanding
Balance at beginning of period (in shares)	1,768,027
Granted (in shares)	524,357
Released (in shares)	(211,519)
Forfeited (in shares)	(57,081)
Balance at end of period (in shares)	2,023,784
Weighted Average Grant-Date Fair Value per Share
Balance at beginning of period (in dollars per share) | $ / shares	$ 20.08
Granted (in dollars per share) | $ / shares	29.97
Released (in dollars per share) | $ / shares	20.10
Forfeited (in dollars per share) | $ / shares	22.98
Balance at end of period (in dollars per share) | $ / shares	$ 22.55
Performance-Based Restricted Stock Units (PRSUs)
Time-Based RSUs Outstanding
Balance at beginning of period (in shares)	42,000
Granted (in shares)	0
Released (in shares)	(6,000)
Forfeited (in shares)	0
Balance at end of period (in shares)	36,000
Weighted Average Grant-Date Fair Value per Share
Balance at beginning of period (in dollars per share) | $ / shares	$ 22.29
Granted (in dollars per share) | $ / shares	0
Released (in dollars per share) | $ / shares	27.10
Balance at end of period (in dollars per share) | $ / shares	$ 21.49

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020	Feb. 29, 2020	Oct. 31, 2019
Income Tax Examination [Line Items]
Income tax provision	$ 3,660	$ 8,568
Effective tax rate (as a percent)	12.70%	25.30%
Unrecognized tax benefits	$ 30,500
Unrecognized tax benefits that would impact tax rate	14,100
Unrecognized tax benefits, increase resulting from current period tax positions	3,300
Interest and penalties relating to unrecognized tax benefits	2,300
Expected decrease in unrecognized tax benefits over next twelve months			$ 1,200
Civil money penalty payment	17,500
Chief Executive Officer
Income Tax Examination [Line Items]
Payment received from CEO for settlement	$ 2,122
Taiwan Tax Authority
Income Tax Examination [Line Items]
Income tax examination, increase (decrease) liability				$ 1,000	$ 1,600

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details)	3 Months Ended
	Sep. 30, 2020USD ($)	Oct. 31, 2019USD ($)	Oct. 31, 2018USD ($)	Feb. 08, 2018claim
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Number of putative class action complaints | claim				2
Civil money penalty payment	$ 17,500,000
Purchase commitments, total	119,700,000
Affiliated
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Purchase commitments, total	33,100,000
Chief Executive Officer
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Payment received from CEO for settlement	2,122,000
Standby Letters of Credit | Bank of America 2018 Credit Agreement | Bank of America | Revolving Credit Facility
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Credit facility, maximum borrowing capacity		$ 6,400,000	$ 3,200,000
Letters of credit outstanding	$ 0

Segment Reporting - Narrative (

Segment Reporting - Narrative (Details)	3 Months Ended
	Sep. 30, 2020segment
Segment Reporting [Abstract]
Number of operating segments	1

Segment Reporting - Property, P

Segment Reporting - Property, Plant and Equipment, net (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Segment Reporting Information [Line Items]
Property, plant and equipment, net	$ 241,852	$ 233,785
United States
Segment Reporting Information [Line Items]
Property, plant and equipment, net	179,629	178,812
Asia
Segment Reporting Information [Line Items]
Property, plant and equipment, net	59,095	51,605
Europe
Segment Reporting Information [Line Items]
Property, plant and equipment, net	$ 3,128	$ 3,368

Subsequent Events - Narrative (

Subsequent Events - Narrative (Details) - USD ($)	Oct. 31, 2020	Aug. 09, 2020
Subsequent Event [Line Items]
Stock repurchase program, authorized amount		$ 30,000,000
Subsequent Event
Subsequent Event [Line Items]
Stock repurchase program, authorized amount	$ 50,000,000