Super Micro Computer (SMCI) 10-Q 6 May 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Mar. 31, 2016	Apr. 29, 2016
Document And Entity Information [Abstract]
Entity Registrant Name	Super Micro Computer, Inc.
Entity Central Index Key	1,375,365
Current Fiscal Year End Date	--06-30
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		48,395,436

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Jun. 30, 2015
Current assets:
Cash and cash equivalents	$ 176,406	$ 95,442
Accounts receivable, net of allowances of $2,468 and $1,628 at March 31, 2016 and June 30, 2015, respectively (including amounts receivable from a related party of $6,034 and $13,186 at March 31, 2016 and June 30, 2015, respectively)	285,705	322,594
Inventory	479,276	463,493
Deferred income taxes-current	17,895	17,863
Prepaid income taxes	14,913	7,507
Prepaid expenses and other current assets	9,416	7,516
Total current assets	983,611	914,415
Long-term investments	2,633	2,633
Property, plant and equipment, net	179,622	163,038
Deferred income taxes-noncurrent	7,089	4,497
Other assets	8,158	5,226
Total assets	1,181,113	1,089,809
Current liabilities:
Accounts payable (including amounts due to a related party of $45,357 and $59,015 at March 31, 2016 and June 30, 2015, respectively)	277,279	299,774
Accrued liabilities	54,132	46,743
Income taxes payable	9,291	14,111
Short-term debt and current portion of long-term debt	93,795	93,479
Total current liabilities	434,497	454,107
Long-term debt-net of current portion	0	933
Other long-term liabilities	37,615	15,684
Total liabilities	$ 472,112	$ 470,724
Commitments and contingencies (Note 10)
Stockholders’ equity:
Common stock and additional paid-in capital, $0.001 par value Authorized shares: 100,000,000 Issued shares: 48,835,128 and 47,873,744 at March 31, 2016 and June 30, 2015 respectively	$ 271,950	$ 247,081
Treasury stock (at cost), 445,028 shares at March 31, 2016 and June 30, 2015	(2,030)	(2,030)
Accumulated other comprehensive loss	(92)	(80)
Retained earnings	439,000	373,950
Total Super Micro Computer, Inc. stockholders’ equity	708,828	618,921
Noncontrolling interest	173	164
Total stockholders’ equity	709,001	619,085
Total liabilities and stockholders’ equity	$ 1,181,113	$ 1,089,809

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Jun. 30, 2015
Current assets:
Accounts receivable, allowances	$ 2,468	$ 1,628
Accounts receivable, related party	6,034	13,186
Current liabilities:
Accounts payable, related party	$ 45,357	$ 59,015
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 issued (in shares)	48,835,128	47,873,744
Treasury stock, shares (in shares)	445,028	445,028

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Net sales (including related party sales of $4,413 and $6,067 in the three months ended March 31, 2016 and 2015, respectively, and $12,125 and $43,524 in the nine months ended March 31, 2016 and 2015, respectively)	$ 532,721	$ 471,225	$ 1,691,303	$ 1,417,561
Cost of sales (including related party purchases of $55,133 and $58,002 in the three months ended March 31, 2016 and 2015, respectively, and $185,845 and $169,918 in the nine months ended March 31, 2016 and 2015, respectively)	453,569	394,405	1,433,574	1,187,096
Gross profit	79,152	76,820	257,729	230,465
Operating expenses:
Research and development	31,256	25,542	89,846	72,516
Sales and marketing	14,467	12,496	45,177	34,656
General and administrative	8,984	7,334	27,695	17,334
Total operating expenses	54,707	45,372	162,718	124,506
Income from operations	24,445	31,448	95,011	105,959
Interest and other income, net	20	21	131	92
Interest expense	(417)	(277)	(1,141)	(656)
Income before income tax provision	24,048	31,192	94,001	105,395
Income tax provision	7,386	8,136	28,951	30,234
Net income	$ 16,662	$ 23,056	$ 65,050	$ 75,161
Net income per common share:
Basic (in dollars per share)	$ 0.35	$ 0.49	$ 1.36	$ 1.63
Diluted (in dollars per share)	$ 0.32	$ 0.44	$ 1.26	$ 1.47
Weighted-average shares used in calculation of net income per common share:
Basic (in shares)	48,047	46,824	47,737	46,138
Diluted (in shares)	52,238	52,008	51,637	51,102

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Net sales, related party sales	$ 4,413	$ 6,067	$ 12,125	$ 43,524
Cost of sales, related party purchases	$ 55,133	$ 58,002	$ 185,845	$ 169,918

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 16,662	$ 23,056	$ 65,050	$ 75,161
Other comprehensive income, net of tax:
Foreign currency translation gains (losses)	4	5	(12)	(11)
Unrealized gains (losses) on investments	0	0	0	0
Total other comprehensive gains (losses)	4	5	(12)	(11)
Comprehensive income	$ 16,666	$ 23,061	$ 65,038	$ 75,150

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
OPERATING ACTIVITIES:
Net income	$ 65,050	$ 75,161
Reconciliation of net income to net cash provided by (used in) operating activities:
Depreciation and amortization	9,538	5,930
Stock-based compensation expense	11,768	9,727
Excess tax benefits from stock-based compensation	(2,506)	(7,229)
Allowance for doubtful accounts	1,014	194
Provision for inventory	6,026	4,462
Exchange gain	(1,492)	(595)
Deferred income taxes	(2,657)	(4,197)
Changes in operating assets and liabilities:
Accounts receivable, net (including changes in related party balances of $7,152 and $(3,981) during the nine months ended March 31, 2016 and 2015, respectively)	35,875	(9,017)
Inventory	(21,809)	(119,007)
Prepaid expenses and other assets	(3,756)	675
Accounts payable (including changes in related party balances of $(13,658) and $2,953 during the nine months ended March 31, 2016 and 2015, respectively)	(23,176)	38,712
Income taxes payable, net	(8,583)	5,814
Accrued liabilities	5,701	6,748
Other long-term liabilities	21,833	1,686
Net cash provided by operating activities	92,826	9,064
INVESTING ACTIVITIES:
Restricted cash	(1,018)	(418)
Investment in a privately held company	0	(661)
Purchases of property, plant and equipment	(25,120)	(24,637)
Net cash used in investing activities	(26,138)	(25,716)
FINANCING ACTIVITIES:
Proceeds from exercise of stock options	10,661	21,071
Minimum tax withholding paid on behalf of employees for restricted stock units	(1,108)	0
Excess tax benefits from stock-based compensation	2,506	7,229
Proceeds from debt	24,100	36,400
Repayment of debt	(23,700)	(35,300)
Payment of obligations under capital leases	(133)	(96)
Advances under receivable financing arrangements	835	669
Net cash provided by financing activities	13,161	29,973
Effect of exchange rate fluctuations on cash	1,115	(948)
Net increase in cash and cash equivalents	80,964	12,373
Cash and cash equivalents at beginning of period	95,442	96,872
Cash and cash equivalents at end of period	176,406	109,245
Supplemental disclosure of cash flow information:
Cash paid for interest	1,136	649
Cash paid for taxes, net of refunds	34,562	27,455
Non-cash investing and financing activities:
Equipment purchased under capital leases	299	428
Accrued costs for property, plant and equipment purchases	$ 7,316	$ 12,511

Condensed Consolidated Stateme8

Condensed Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net cash provided by (used in) operating activities
Accounts receivable, changes in related party balances	$ 7,152	$ (3,981)
Accounts payable, changes in related party balances	$ (13,658)	$ (2,953)

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Mar. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Organization Super Micro Computer, Inc. (“Super Micro Computer”) was incorporated in 1993. Super Micro Computer is a global leader in server technology and green computing innovation. Super Micro Computer develops and provides high performance server solutions based upon an innovative, modular and open-standard architecture. Super Micro Computer has operations primarily in San Jose, California, the Netherlands, Taiwan, China and Japan. Basis of Presentation The condensed consolidated financial statements reflect the condensed consolidated balance sheets, results of operations, comprehensive income and cash flows of Super Micro Computer, Inc. and its wholly-owned subsidiaries (collectively, the “Company”). All intercompany accounts and transactions have been eliminated in consolidation. 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 (“SEC”) and include the accounts of the Company and its wholly-owned subsidiaries. Certain information and footnote disclosures normally included in financial statements prepared in accordance with United States generally accepted accounting principles have been condensed or omitted pursuant to such rules and regulations. These condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements for the fiscal year ended June 30, 2015 included in its Annual Report on Form 10-K/A, as filed with the SEC (the “Annual Report”). 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 condensed consolidated results of operations for the three and nine months ended March 31, 2016 are not necessarily indicative of the results that may be expected for future quarters or for the fiscal year ending June 30, 2016 . The Company consolidates its investment in Super Micro Asia Science and Technology Park, Inc. as it is a variable interest entity and the Company is the primary beneficiary. The noncontrolling interest is presented as a separate component from the Company's equity in the equity section of the condensed consolidated balance sheets. Net income attributable to the noncontrolling interest is not presented separately in the condensed consolidated statements of operations and is included in the general and administrative expenses as the amount is not material for any of the fiscal periods presented. Fair Value of Financial Instruments The Company accounts for certain assets and liabilities at fair value. Accounts receivable and accounts payable are carried at cost, which approximates fair value due to the short maturity of these instruments. Cash equivalents and long-term investments are carried at fair value. Short-term and long-term debt is carried at amortized cost, which approximates its fair value based on borrowing rates currently available to the Company for loans with similar terms. The hierarchy below lists three levels of fair value based on the extent to which inputs used in measuring fair value are observable in the market. The Company categorizes each of its fair value measurements in one of these three levels based on the lowest level input that is significant to the fair value measurement in its entirety. These levels are: • Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities; • Level 2 - Quoted prices in markets that are not active or financial instruments for which all significant inputs are observable, either directly or indirectly; and • Level 3 - Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable. Net Income Per Common Share The Company's basic earnings per share is computed by dividing income available to common stockholders by the weighted-average number of shares of common stock outstanding during the period. Diluted earnings per share is computed by dividing income available to common stockholders by the weighted-average number of shares of common stock outstanding during the period increased to include the number of additional shares of common stock that would have been outstanding if the potentially dilutive securities had been issued. Potentially dilutive securities include outstanding stock options and unvested restricted stock units (“RSUs”). The dilutive effect of potentially dilutive securities is reflected in diluted earnings per share by application of the treasury stock method. Under the treasury stock method, an increase in the fair market value of the Company’s common stock can result in a greater dilutive effect from potentially dilutive securities. Additionally, the exercise of employee stock options and the vesting of restricted stock units results in a further dilutive effect on net income per share. Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (“FASB”) issued new accounting guidance related to revenue recognition. This new standard replaces all current U.S. GAAP guidance on revenue, eliminates all industry-specific guidance and provides a unified model in determining when and how revenue is recognized. The core principle is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Further, in March 2016, the FASB issued an amendment to the accounting guidance related to revenue from contracts with customers - principal versus agent considerations. In April 2016, the FASB issued an amendment to the accounting guidance related to revenue from contracts with customers - identifying performance obligations and licensing. These guidances can be applied either retrospectively or as a cumulative-effect adjustment as of the date of adoption. Early adoption is permitted for annual periods beginning after December 15, 2016. The new standard is effective for the Company on July 1, 2018. The Company is currently evaluating the effect the guidance will have on the Company's financial statement disclosures, results of operations and financial position. In April 2015, the FASB issued an amendment to the accounting guidance related to presentation of debt issuance costs. The amendment requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. In August 2015, the FASB issued an amendment to the accounting guidance related to presentation and subsequent measurement of debt issuance costs associated with line-of-credit arrangements. The amendment clarified that an entity may defer and present debt issuance costs associated with line-of-credit arrangements as an asset and subsequently amortize the deferred debt issuance costs ratably over the term of the line-of-credit arrangement, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement. The amendment is effective for the Company on July 1, 2016. The Company is currently evaluating the effect the amendment to the guidance will have on the Company's financial statement disclosures, results of operations and financial position. In July 2015, the FASB issued an amendment to the authoritative guidance related to inventory measurement. The amendment requires entities to measure inventory at the lower of cost and net realizable value thereby simplifying the current guidance under which an entity must measure inventory at the lower of cost or market. The amendment is effective for the Company on July 1, 2017. The Company is currently evaluating the effect the amendment to the guidance will have on the Company's financial statement disclosures, results of operations and financial position. In November 2015, the FASB issued an amendment to the accounting guidance related to balance sheet classification of deferred taxes. The amendment requires that all deferred tax assets and liabilities be classified as noncurrent in a classified balance sheet. Early adoption is permitted as of the beginning of an interim or annual reporting period. The amendment is effective for the Company on July 1, 2017. The Company is currently evaluating the effect the amendment to the guidance will have on the Company's financial statement disclosures, results of operations and financial position. In February 2016, the FASB issued an amendment to the accounting guidance related to leases. The amendment will supersede the existing lease guidance, including on-balance sheet recognition of operating leases for lessees. This amendment should be applied using a modified retrospective approach and is effective for the Company on July 1, 2018. Early adoption is permitted. The Company is currently evaluating the effect the guidance will have on its financial statement disclosures, results of operations and financial position. In March 2016, the FASB issued new accounting guidance on the accounting for certain aspects of share-based payment to employees, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements as well as classification in the statement of cash flows. This guidance is effective for us on July 1, 2017. The Company is currently evaluating the effect the guidance will have on its financial statement disclosures, results of operations and financial position.

Stock-based Compensation and St

Stock-based Compensation and Stockholders' Equity	9 Months Ended
	Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based Compensation and Stockholders' Equity	Stock-based Compensation and Stockholders’ Equity Equity Incentive Plan In January 2016, the Board of Directors approved the 2016 Equity Incentive Plan (the "2016 Plan") and reserved for issuance 4,700,000 shares of common stock for the granting of stock options, stock appreciation rights, restricted stock awards, restricted stock units and other equity-based awards. The 2016 Plan was approved by the stockholders of the Company and became effective on March 8, 2016. As of such date, 8,696,444 shares of common stock were reserved for outstanding awards under the Company's 2006 Equity Incentive Plan (the "2006" Plan). Such awards remained outstanding under the 2006 Plan following the adoption of the 2016 Plan. In addition, 1,153,412 shares of common stock originally reserved for issuance under the 2006 Plan were cancelled upon the adoption of the 2016 Plan. Under the 2016 Plan, the exercise price per share for incentive stock options granted to employees owning shares representing more than 10% of the Company at the time of grant cannot be less than 110% of the fair value of the underlying share on grant date. Nonqualified stock options and incentive stock options granted to all other persons shall be granted at a price not less than 100% of the fair value. Options generally expire ten years after the date of grant. Stock options and restricted stock units vest over four years ; 25% at the end of one year and one sixteenth per quarter thereafter . As of March 31, 2016 , the Company had 4,678,000 authorized shares available for future issuance under the 2016 Plan. Determining Fair Value Valuation and amortization method—The Company's fair value of restricted stock units 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 formula and a single option award approach. This fair value is then amortized ratably over the requisite service periods of the awards, which is generally the vesting period. Expected Term—The Company’s expected term represents the period that the Company’s stock options are expected to be outstanding and was determined based on a combination of the Company's peer group and the Company's historical experience. Expected Volatility—Expected volatility is based on a combination of the Company's implied and historical volatility. Expected Dividend Yield—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 U.S. Treasury zero coupon issues in effect at the time of grant for periods corresponding with the expected term of the stock options. Estimated Forfeitures—The estimated forfeiture rate is based on the Company’s historical forfeiture rates and the estimate is revised in subsequent periods if actual forfeitures differ from the estimate. The fair value of stock option grants for the three and nine months ended March 31, 2016 and 2015 was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions: Three Months Ended Nine Months Ended 2016 2015 2016 2015 Risk-free interest rate 1.38% - 1.48% 1.35% - 1.58% 1.38% - 1.57% 1.35% - 1.76% Expected term 5.31 years 5.40 years 5.31 - 5.33 years 5.40 - 5.44 years Dividend yield — % — % — % — % Volatility 49.09% - 50.89% 47.60% - 48.26% 47.06% - 50.89% 46.93% - 49.31% Weighted-average fair value $ 12.99 $ 15.92 $ 12.04 $ 12.59 The following table shows total stock-based compensation expense included in the condensed consolidated statements of operations for the three and nine months ended March 31, 2016 and 2015 (in thousands): Three Months Ended Nine Months Ended 2016 2015 2016 2015 Cost of sales $ 294 $ 222 $ 792 $ 651 Research and development 2,549 2,255 7,423 6,148 Sales and marketing 491 369 1,330 1,148 General and administrative 552 720 2,223 1,780 Stock-based compensation expense before taxes 3,886 3,566 11,768 9,727 Income tax impact (1,191 ) (1,355 ) (3,290 ) (2,747 ) Stock-based compensation expense, net $ 2,695 $ 2,211 $ 8,478 $ 6,980 The cash flows resulting from the tax benefits for tax deductions resulting from the exercise of stock options in excess of the compensation expense recorded for those options (excess tax benefits) issued or modified since July 1, 2006 are classified as cash provided by financing activities. Excess tax benefits for stock options issued prior to July 1, 2006 are classified as cash provided by operating activities. The Company had $ 3,548,000 and $ 10,576,000 of excess tax benefits recorded in additional paid-in capital in the nine months ended March 31, 2016 and 2015 , respectively. The Company had excess tax benefits classified as cash provided by financing activities of $ 2,506,000 and $ 7,229,000 in the nine months ended March 31, 2016 and 2015 , respectively, for options issued since July 1, 2006. As of March 31, 2016 , the Company’s total unrecognized compensation cost related to non-vested stock-based awards granted to employees and non-employee directors was $ 35,590,000 , which will be recognized over a weighted-average vesting period of approximately 2.31 years. Stock Option Activity The following table summarizes stock option activity during the nine months ended March 31, 2016 under all plans: Options Outstanding Weighted Average Exercise Price per Share Weighted Average Remaining Contractual Term (in Years) Aggregate Intrinsic Value (in thousands) Balance as of June 30, 2015 (7,208,475 shares exercisable at weighted average exercise price of $12.24 per share) 9,702,843 $ 14.21 Granted (weighted average fair value of $12.04) 279,650 $ 26.61 Exercised (897,424 ) $ 11.88 Forfeited (35,531 ) $ 18.85 Balance as of March 31, 2016 9,049,538 $ 14.81 5.43 $ 174,856 Options vested and expected to vest at March 31, 2016 8,956,079 $ 14.70 5.40 $ 174,044 Options vested and exercisable at March 31, 2016 7,346,160 $ 13.17 4.78 $ 153,798 The total pretax intrinsic value of options exercised was $11,637,000 and $16,491,000 during the three and nine months ended March 31, 2016 , respectively, and $22,231,000 and $44,301,000 during the three and nine months ended March 31, 2015 , respectively. Restricted Stock Unit Activity In January 2015, the Company began to grant restricted stock units to employees. The Company grants restricted stock units to certain employees as part of its regular employee equity compensation review program as well as to selected new hires. Restricted stock units are share awards that entitle the holder to receive freely tradable shares of the Company's common stock upon vesting and settlement. The following table summarizes restricted stock unit activity during the nine months ended March 31, 2016 under all plans: Restricted Stock Units Outstanding Weighted Average Grant-Date Fair Value per Share Aggregate Intrinsic Value (in thousands) Balance as of June 30, 2015 303,324 $ 36.02 Granted 614,560 $ 28.35 Vested (102,918 ) $ 33.24 Forfeited (33,060 ) $ 30.52 Balance as of March 31, 2016 781,906 $ 30.59 $ 26,647 The total pretax intrinsic value of restricted stock units vested was $1,579,000 and $2,937,000 for the three and nine months ended March 31, 2016 , respectively. In the three and nine months ended March 31, 2016 , upon vesting, 50,912 and 102,918 shares of restricted stock units were partially net share-settled such that the Company withheld 19,480 and 38,801 shares with value equivalent to the employees' minimum statutory obligation for the applicable income and other employment taxes, and remitted the cash to the appropriate taxing authorities, respectively. The total shares withheld were based on the value of the restricted stock units on their respective vesting dates as determined by the Company's closing stock price. Total payments for the employees' tax obligations to taxing authorities were $604,000 and $1,108,000 during the three and nine months ended March 31, 2016 , respectively, and are reflected as a financing activity within the condensed consolidated statements of cash flows. These net-share settlements had the effect of share repurchases by the Company as they reduced and retired the number of shares that would have otherwise been issued as a result of the vesting and did not represent an expense to the Company. Pursuant to the terms of the 2016 Plan, shares withheld in connection with net-share settlements are returned to the 2016 Plan and are available for future grants under the 2016 Plan.

Net Income Per Common Share

Net Income Per Common Share	9 Months Ended
	Mar. 31, 2016
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 share for the three and nine months ended March 31, 2016 (in thousands, except per share amounts): Three Months Ended Nine Months Ended 2016 2015 2016 2015 Numerator: Net income $ 16,662 $ 23,056 $ 65,050 $ 75,161 Denominator: Weighted-average shares outstanding 48,047 46,824 47,737 46,138 Effect of dilutive securities 4,191 5,184 3,900 4,964 Weighted-average diluted shares 52,238 52,008 51,637 51,102 Basic net income per share $ 0.35 $ 0.49 $ 1.36 $ 1.63 Diluted net income per share $ 0.32 $ 0.44 $ 1.26 $ 1.47 For the three and nine months ended March 31, 2016 and 2015 , the Company had stock options and restricted stock units 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 1,287,000 and 1,235,000 for the three and nine months ended March 31, 2016 , respectively, and 175,000 and 627,000 for the three and nine months ended March 31, 2015 , respectively.

Balance Sheet Components

Balance Sheet Components	9 Months Ended
	Mar. 31, 2016
Balance Sheet Related Disclosures [Abstract]
Balance Sheet Components	Balance Sheet Components The following tables provide details of the selected balance sheet items (in thousands): Inventory: March 31, June 30, Finished goods $ 356,966 $ 384,647 Work in process 32,281 23,214 Purchased parts and raw materials 90,029 55,632 Total inventory $ 479,276 $ 463,493 The Company recorded a provision for lower of cost or market and excess and obsolete inventory totaling $2,246,000 and $6,026,000 in the three and nine months ended March 31, 2016 , respectively, and $287,000 and $4,462,000 in the three and nine months ended March 31, 2015 , respectively. Property, Plant, and Equipment: March 31, June 30, Land $ 70,454 $ 63,962 Buildings 71,665 51,959 Building and leasehold improvements 7,586 8,323 Buildings and leasehold improvements construction in progress (1) 10,895 25,572 Machinery and equipment 50,514 40,689 Furniture and fixtures 10,213 7,421 Purchased software 13,464 3,343 Purchased software construction in progress (2) 493 8,567 235,284 209,836 Accumulated depreciation and amortization (55,662 ) (46,798 ) Property, plant and equipment, net $ 179,622 $ 163,038 (1) In connection with the purchase of property located in San Jose, California for the Company's Green Computing Park, the Company continues to engage several contractors for the development and construction of improvements on the property. The first manufacturing building at this location was completed in August 2015. In the nine months ended March 31, 2016, the Company also engaged a contractor for the construction of improvements on leasehold property located in the Netherlands, which was completed in October 2015. (2) The Company completed its implementation of a new enterprise resource planning, or ERP, system for its U.S. headquarters on July 5, 2015 and for its subsidiaries in Taiwan and the Netherlands in January 2016. The Company has capitalized the costs of the new ERP software and certain expenses associated directly with the implementation of the ERP system as of January 2016 and began to depreciate these costs in the nine months ended March 31, 2016. Other Assets: March 31, June 30, Long-term deferred service costs $ 3,033 $ 1,490 Prepaid royalty license 810 997 Investment in a privately held company 1,411 1,411 Restricted cash 1,848 840 Deposits 924 265 Others 132 223 Total other assets $ 8,158 $ 5,226 Restricted cash consists primarily of certificates of deposits pledged as security for one irrevocable letter of credit required in connection with a warehouse lease in Fremont, California, two deposits to escrow accounts required by the Company's worker's compensation program, one deposit required for the Company's bonded warehouse set up in Taiwan and bank guarantees in connection with office leases in the Netherlands. Accrued Liabilities: March 31, June 30, Accrued payroll and related expenses $ 15,574 $ 15,141 Customer deposits 6,255 6,314 Accrued warranty costs 5,634 7,700 Accrued cooperative marketing expenses 7,782 5,690 Deferred service revenue 10,816 4,085 Others 8,071 7,813 Total accrued liabilities $ 54,132 $ 46,743 Product Warranties: Three Months Ended Nine Months Ended 2016 2015 2016 2015 Balance, beginning of period $ 7,777 $ 6,960 $ 7,700 $ 7,083 Provision for warranty 3,685 3,968 12,229 10,928 Costs charged to accrual (3,872 ) (3,706 ) (10,545 ) (10,476 ) Change in estimated liability for pre-existing warranties (460 ) (13 ) (2,254 ) (326 ) Balance, end of period 7,130 7,209 7,130 7,209 Current portion (5,634 ) (7,209 ) (5,634 ) (7,209 ) Long-term portion $ 1,496 $ — $ 1,496 $ —

Long-term Investments

Long-term Investments	9 Months Ended
	Mar. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Long-term Investments	Long-term Investments As of March 31, 2016 and June 30, 2015 , the Company held $2,633,000 , of auction-rate securities (“auction rate securities”), net of unrealized losses, representing its interest in auction rate preferred shares in a closed end mutual fund invested in municipal securities; such auction rate securities were rated AA2 at March 31, 2016 and AA2 at June 30, 2015 . These auction rate preferred shares have no stated maturity date. During February 2008, the auctions for these auction rate securities began to fail to obtain sufficient bids to establish a clearing rate and the securities were not salable in the auction, thereby losing the short-term liquidity previously provided by the auction process. As a result, as of March 31, 2016 and June 30, 2015 , $2,633,000 of these auction rate securities have been classified as long-term available-for-sale investments. The Company has used a discounted cash flow model to estimate the fair value of the auction rate securities as of March 31, 2016 and June 30, 2015 . The material factors used in preparing the discounted cash flow model are (i) the discount rate utilized to present value the cash flows, (ii) the time period until redemption and (iii) the estimated rate of return. As of March 31, 2016 , the discount rate, the time period until redemption and the estimated rate of return were 1.81% , 3 years and 0.41% , respectively. Management derives the estimates by obtaining input from market data on the applicable discount rate, estimated time to redemption and estimated rate of return. The changes in fair value have been primarily due to changes in the estimated rate of return and a change in the estimated redemption period. The fair value of the Company's investment portfolio may change between 1% to 3% by increasing or decreasing the rate of return used by 1% or by increasing or decreasing the term used by 1 year . Changes in these estimates or in the market conditions for these investments are likely in the future based upon the then current market conditions for these investments and may affect the fair value of these investments. On a quarterly basis, the Company reviews the inputs to assess their continued appropriateness and consistency. If any significant differences were to be noted, they would be researched in order to determine the reason. However, historically, no significant differences have been noted. The Company has consistently applied these valuation techniques in all periods presented and believes it has obtained the most accurate information available for the auction rate securities. Movement of these inputs would not significantly impact the fair value of the auction rate securities. Based on this assessment of fair value, the Company determined that there was no changes in fair value of its auction rate securities during the three and nine months ended March 31, 2016 and 2015 . There was a cumulative total decline of $117,000 as of March 31, 2016 and June 30, 2015 . That amount has been recorded as a component of other comprehensive income. As of March 31, 2016 and June 30, 2015 , the Company has recorded an accumulated unrealized loss of $70,000 , net of deferred income taxes, on long-term auction rate securities. The Company deems this loss to be temporary as it will not likely be required to sell the securities before their anticipated recovery and the Company has the intent and financial ability to hold these investments until recovery of cost. Although the investment impairment is considered to be temporary, these investments are not currently liquid and in the event the Company needs to access these funds, the Company will not be able to do so without a loss of principal. The Company plans to continue to monitor the liquidity situation in the marketplace and the creditworthiness of its holdings and will perform periodic impairment analysis. In the three and nine months ended March 31, 2016 and 2015 , there were no auction rate securities redeemed or sold.

Fair Value Disclosure

Fair Value Disclosure	9 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value Disclosure	Fair Value Disclosure The financial assets of the Company measured at fair value on a recurring basis are included in cash equivalents and long-term investments. The Company’s money market funds are classified within Level 1 of the fair value hierarchy which is based on quoted market prices for the identical underlying securities in active markets. The Company’s long-term auction rate securities investments are classified within Level 3 of the fair value hierarchy which did not have observable inputs for its auction rate securities as of March 31, 2016 and June 30, 2015 . Refer to Note 1 for a discussion of the Company’s policies regarding the fair value hierarchy. The Company’s methodology for valuing these investments is the discounted cash flow model and is described in Note 5. The following table sets forth the Company’s cash equivalents and long-term investments as of March 31, 2016 and June 30, 2015 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): March 31, 2016 Level 1 Level 2 Level 3 Asset at Fair Value Money market funds $ 312 $ — $ — $ 312 Auction rate securities — — 2,633 2,633 Total $ 312 $ — $ 2,633 $ 2,945 June 30, 2015 Level 1 Level 2 Level 3 Asset at Fair Value Money market funds $ 310 $ — $ — $ 310 Auction rate securities — — 2,633 2,633 Total $ 310 $ — $ 2,633 $ 2,943 The above table excludes $175,873,000 and $94,901,000 of cash and $2,128,000 and $1,130,000 of certificates of deposit held by the Company as of March 31, 2016 and June 30, 2015 , respectively. There were no transfers between Level 1, Level 2 or Level 3 securities in the three and nine months ended March 31, 2016 and 2015 . The following table provides a reconciliation of the Company’s financial assets measured at fair value on a recurring basis, consisting of long-term auction rate securities, using significant unobservable inputs (Level 3) for the three and nine months ended March 31, 2016 and 2015 (in thousands): Three Months Ended Nine Months Ended 2016 2015 2016 2015 Balance as of beginning of period $ 2,633 $ 2,647 $ 2,633 $ 2,647 Total realized gains or (losses) included in net income — — — — Total unrealized gains or (losses) included in other comprehensive income — — — — Sales and settlements at par — — — — Transfers in and/or out of Level 3 — — — — Balance as of end of period $ 2,633 $ 2,647 $ 2,633 $ 2,647 The following is a summary of the Company’s long-term investments as of March 31, 2016 and June 30, 2015 (in thousands): March 31, 2016 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value Auction rate securities $ 2,750 $ — $ (117 ) $ 2,633 June 30, 2015 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value Auction rate securities $ 2,750 $ — $ (117 ) $ 2,633 The Company measures the fair value of outstanding debt for disclosure purposes on a recurring basis. As of March 31, 2016 and June 30, 2015 , short-term and long-term debt of $93,795,000 and $94,412,000 , respectively, are reported at amortized cost. This outstanding debt is classified as Level 2 as it is not actively traded and is valued using a discounted cash flow model that uses observable market inputs. Based on the discounted cash flow model, the fair value of the outstanding debt approximates amortized cost.

Short-term and Long-term Obliga

Short-term and Long-term Obligations	9 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Short-term and Long-term Obligations	Short-term and Long-term Obligations Short-term and long-term obligations as of March 31, 2016 and June 30, 2015 consisted of the following (in thousands): March 31, June 30, 2016 2015 Line of credit: Bank of America $ 62,199 $ 59,699 CTBC Bank 9,700 9,700 Total line of credit 71,899 69,399 Building term loans: Bank of America 1,633 3,733 CTBC Bank 20,263 21,280 Total building term loans 21,896 25,013 Total debt 93,795 94,412 Current portion (93,795 ) (93,479 ) Long-term portion $ — $ 933 Activities under Revolving Lines of Credit and Term Loans Bank of America In June 2015, the Company entered into an amendment to the existing credit agreement with Bank of America N.A. ("Bank of America") which provided for (i) a $65,000,000 revolving line of credit facility that would have matured on November 15, 2015 and (ii) a five-year $14,000,000 term loan facility. The term loan is secured by the three buildings located in San Jose, California and the principal and interest are payable monthly through September 30, 2016 with an interest rate at the LIBOR rate plus 1.50% per annum. In April 2016, the Company extended the revolving line of credit to mature on May 31, 2016, and the Company is currently negotiating with Bank of America to renew the revolving line of credit. The line of credit facility provides for borrowings denominated both in U.S. dollars and in Taiwanese dollars. For borrowings denominated in U.S. dollars, the interest rate for the revolving line of credit is at the LIBOR rate plus 1.25% per annum. The LIBOR rate was 0.44% at March 31, 2016 . For borrowings denominated in Taiwanese dollars, the interest rate is equal to the lender's established interest rate which is adjusted monthly. As of March 31, 2016 and June 30, 2015 , the total outstanding borrowings under the Bank of America term loan were $1,633,000 and $3,733,000 , respectively. The total outstanding borrowings under the Bank of America line of credit were $62,199,000 and $59,699,000 as of March 31, 2016 and June 30, 2015 , respectively. The interest rates for these loans ranged from 1.00% to 1.94% per annum at March 31, 2016 and from 0.79% to 1.68% per annum at June 30, 2015 , respectively. As of March 31, 2016 , the unused revolving line of credit with Bank of America was $2,801,000 . CTBC Bank In November 2015, the Company entered into an amendment to the existing credit agreement with CTBC Bank Co., Ltd ("CTBC Bank") that provides for (i) a 12 -month NT $700,000,000 or $22,017,000 U.S. dollar equivalent term loan 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 and (ii) a 12 -month revolving line of credit up to 80.0% of eligible accounts receivable in an aggregate amount of up to $17,000,000 with an interest rate equal to the lender's established USD interest rate plus 0.30% per annum which is adjusted monthly. The total borrowings allowed under the credit agreement are capped at NT $1,000,000,000 or $30,340,000 U.S. dollar equivalent. The total outstanding borrowings under the CTBC Bank term loan are denominated in Taiwanese dollars and were translated into U.S. dollars of $20,263,000 and $21,280,000 at March 31, 2016 and June 30, 2015 , respectively. The total outstanding borrowings under the CTBC Bank revolving line of credit were $9,700,000 in U.S. dollars at March 31, 2016 and June 30, 2015 . The interest rate for this loan ranged from 0.92% and 1.06% at March 31, 2016 and 0.82% and 1.16% per annum at June 30, 2015 . In April 2016, the Company entered into a credit agreement with CTBC Bank Co., Ltd that provides for (i) a 12 -month NT 700,000,000 or $21,620,000 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. This term loan facility also includes a 12 -month customs bond up to NT 100,000,000 or $3,089,000 U.S. dollar equivalent with an annual fee equal to 0.5% per annum, and (ii) a 12 -month revolving line of credit up to 80.0% of eligible accounts receivable in an aggregate amount of up to $40,000,000 with an interest rate equal to the lender's established USD interest rate plus 0.30% per annum which is adjusted monthly. The total borrowings allowed under the credit agreement are capped at $40,000,000 . The credit agreement matures on March 31, 2017. Covenant Compliance The credit agreement with Bank of America contains customary representations and warranties and customary affirmative and negative covenants applicable to the Company and its subsidiaries. The credit agreement contains certain financial covenants, including the following: • Not to incur on a consolidated basis, a net loss before taxes and extraordinary items in any two consecutive quarterly accounting periods; • The Company’s funded debt to EBITDA ratio (ratio of all outstanding liabilities for borrowed money and other interest-bearing liabilities, including current and long-term debt, less the non-current portion of subordinated liabilities to EBITDA) shall not be greater than 2.00; • The Company’s unencumbered liquid assets, as defined in the agreement, held in the United States shall have an aggregate market value of not less than $30,000,000, measured as of the last day of each fiscal quarter and the last day of each fiscal year. As of March 31, 2016 and June 30, 2015 , total assets of $1,137,023,000 and $1,045,408,000 , respectively, collateralized the line of credit with Bank of America which represents all of the assets of the Company except for the three buildings purchased in San Jose, California in June 2010 and the land and building located in Bade, Taiwan. As of March 31, 2016 and June 30, 2015 , total assets collateralizing the term loan with Bank of America were $17,181,000 and $17,354,000 . As of March 31, 2016 , the Company was in compliance with all financial covenants associated with the credit agreement with Bank of America. As of March 31, 2016 and June 30, 2015 , the land and building located in Bade, Taiwan with a value of $26,909,000 and $27,047,000 , respectively, collateralized the term loan with CTBC Bank. There are no financial covenants associated with the term loan with CTBC Bank at March 31, 2016 .

Related-party and Other Transac

Related-party and Other Transactions	9 Months Ended
	Mar. 31, 2016
Related Party Transactions [Abstract]
Related-party and Other Transactions	Related-party and Other Transactions Ablecom Technology Inc. —Ablecom, a Taiwan corporation, together with one of its subsidiaries, Compuware (collectively “Ablecom”), is one of the Company’s major contract manufacturers. Ablecom’s ownership of Compuware is below 50% but Compuware remains a related party as Ablecom still has significant influence over its operations. 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 of Directors. Ablecom owns approximately 0.3% of the Company’s common stock. Charles Liang and his wife, also an officer of the Company, collectively own approximately 10.5% of Ablecom, while Steve Liang and other family members own approximately 36.0% of Ablecom at March 31, 2016 . The Company has product design and manufacturing services agreements (“product design and manufacturing agreements”) and a distribution agreement (“distribution agreement”) with Ablecom. Under the product design and manufacturing agreements, the Company outsources a portion of its design activities and a significant part of its manufacturing of components such as server chassis to Ablecom. Ablecom agrees to design products according to the Company’s specifications. Additionally, Ablecom agrees to build the tools needed to manufacture the products. The Company has agreed to pay for Ablecom's cost of chassis and related product tooling and engineering services and will pay for those items when the work has been completed. Under the distribution agreement, Ablecom purchases server products from the Company for distribution in Taiwan. The Company believes that the pricing and terms under the distribution agreement are similar to the pricing and terms of distribution arrangements the Company has with similar, third party distributors. Ablecom’s net sales to the Company and its net sales of the Company’s products to others comprise a substantial majority of Ablecom’s net sales. The Company purchased products from Ablecom totaling $55,133,000 and $185,845,000 , and sold products to Ablecom totaling $4,413,000 and $12,125,000 for the three and nine months ended March 31, 2016 , respectively. The Company purchased products from Ablecom totaling $58,002,000 and $169,918,000 , and sold products to Ablecom totaling $6,067,000 and $43,524,000 for the three and nine months ended March 31, 2015 , respectively. Amounts owed to the Company by Ablecom as of March 31, 2016 and June 30, 2015 were $6,034,000 and $13,186,000 , respectively. Amounts owed to Ablecom by the Company as of March 31, 2016 and June 30, 2015 were $45,357,000 and $59,015,000 , respectively. For the three and nine months ended March 31, 2016 , the Company paid Ablecom the majority of invoiced dollars between 34 and 88 days of invoice date. For the three and nine months ended March 31, 2016 , the Company paid $3,003,000 and $5,901,000 , respectively, for tooling assets and miscellaneous costs to Ablecom. For the three and nine months ended March 31, 2015 , the Company paid $231,000 and $4,728,000 , respectively, for tooling assets and miscellaneous costs to Ablecom. The Company’s exposure to loss as a result of its involvement with Ablecom is limited to (a) 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 and (b) potential losses on outstanding accounts receivable from Ablecom in the event of an unforeseen deterioration in the financial condition of Ablecom such that Ablecom defaults on its payable to the Company. Outstanding purchase orders with Ablecom were $65,227,000 and $67,261,000 at March 31, 2016 and June 30, 2015 , respectively, representing the maximum exposure to loss relating to (a) above. The Company does not have any direct or indirect guarantees of losses of Ablecom. In May 2012, the Company and Ablecom jointly established Super Micro Asia Science and Technology Park, Inc. ("Management Company") in Taiwan to manage the common areas shared by the Company and Ablecom for their separately constructed manufacturing facilities. Each company contributed $168,000 and owns 50% of the Management Company. Although the operations of the Management Company are independent of the Company, through governance rights, the Company has the ability to direct the Management Company's business strategies. Therefore, the Company has concluded that the Management Company is a variable interest entity of the Company as the Company is the primary beneficiary of the Management Company. The accounts of the Management Company are consolidated with the accounts of the Company, and a noncontrolling interest has been recorded for the Ablecom's interests in the net assets and operations of the Management Company. In the three and nine months ended March 31, 2016 , $13,000 and $9,000 of net income attributable to Ablecom's interest was included in the Company's general and administrative expenses in the condensed consolidated statements of operations. In the three and nine months ended March 31, 2015 , $4,000 and $(3,000) of net income (loss) attributable to Ablecom's interest was included in the Company's general and administrative expenses in the condensed consolidated statements of operations.

Income Taxes

Income Taxes	9 Months Ended
	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company recorded provisions for income taxes of $7,386,000 and $28,951,000 for the three and nine months ended March 31, 2016 , respectively, and $8,136,000 and $30,234,000 for the three and nine months ended March 31, 2015 , respectively. The effective tax rate was 30.7% and 30.8% for the three and nine months ended March 31, 2016 , respectively, and 26.1% and 28.7% for the three and nine months ended March 31, 2015 , respectively. The effective tax rate for the three and nine months ended March 31, 2016 is estimated to be lower than the federal statutory rate primarily due to the reinstatement of the U.S. federal research and development ("R&D") tax credit partially offset by the impact of stock option expenses and additional tax accruals related to foreign operations. On December 18, 2015, the Protecting Americans from Tax Hikes Act of 2015 extended the U.S. federal R&D tax credit permanently from January 1, 2015. As of March 31, 2016 , the Company projected a total net tax benefit of $4,384,000 for fiscal year 2016, and $2,770,000 reinstated for fiscal year 2015. As of March 31, 2016 , the Company had a liability for gross unrecognized tax benefits of $15,794,000 , substantially all of which, if recognized, would affect the Company's effective tax rate. During the three and nine months ended March 31, 2016 , there were no material changes in the total amount of the liability for 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 March 31, 2016 , the Company had accrued $1,010,000 of interest and penalties relating to unrecognized tax benefits. The Company is subject to U.S. federal income tax as well as income taxes in many state and foreign jurisdictions. In August 2015, the Company met with the Internal Revenue Service in connection with its examination of the Company's federal income tax returns for tax years 2013 and 2014. The Company is also under audit in Taiwan for tax year ended June 30, 2014. The Company does not expect a resolution to be reached regarding either matter during the next twelve months. While management believes that the Company has adequate reserves for all uncertain tax positions, 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 the underlying matters are settled or otherwise resolved. The federal statute of limitations remain open in general for tax years 2013 through 2015. The various state statute of limitations remain open in general for tax years 2011 through 2015. The statute of limitations in major foreign jurisdictions remain open for examination in general for tax years 2010 through 2015.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Litigation and Claims — The Company is involved in various legal proceedings arising from the normal course of business activities. The Company defends itself vigorously against any such claims. In management’s opinion, the resolution of any matters will not have a material adverse effect on the Company’s consolidated financial condition, results of operations or liquidity. Purchase Commitments — The Company has agreements to purchase certain units of inventory and non-inventory items through fiscal year 2017 . As of March 31, 2016 , these remaining non-cancellable commitments were $341,559,000 compared to $378,341,000 as of June 30, 2015 . Included in the above non-cancellable commitments are hard disk drive purchase commitments totaling approximately $116,922,000 , which will be paid through December 2016 . The Company has entered into purchase agreements with selected suppliers of hard disk drives in order to ensure continuity of supply for these components. The agreements provide for some variation in the amount of units the Company is required to purchase and the suppliers may modify the purchase price for these components due to significant changes in market or component supply conditions. Product mix for these components may be negotiated quarterly and the purchase price for these components will be reviewed quarterly with the suppliers. The Company has been negotiating the purchase price with the suppliers on an ongoing basis based upon market rates.

Segment Reporting

Segment Reporting	9 Months Ended
	Mar. 31, 2016
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. International net sales are based on the country and region to which the products were shipped. The following is a summary for the three and nine months ended March 31, 2016 and 2015 , of net sales by geographic region (in thousands): Three Months Ended Nine Months Ended 2016 2015 2016 2015 Net sales: United States $ 326,392 $ 273,631 $ 1,072,126 $ 803,757 Europe 93,279 88,259 294,239 269,404 Asia 78,544 74,772 241,595 241,785 Other 34,506 34,563 83,343 102,615 $ 532,721 $ 471,225 $ 1,691,303 $ 1,417,561 The following is a summary of long-lived assets, excluding financial instruments, deferred tax assets, other assets, goodwill and intangible assets (in thousands): March 31, June 30, 2016 2015 Long-lived assets: United States $ 135,732 $ 124,292 Asia 40,627 37,695 Europe 3,263 1,051 $ 179,622 $ 163,038 The following is a summary of net sales by product type (in thousands): Three Months Ended Nine Months Ended 2016 2015 2016 2015 Amount Percent of Net Sales Amount Percent of Net Sales Amount Percent of Amount Percent of Server systems $ 372,404 69.9 % $ 301,953 64.1 % $ 1,182,362 69.9 % $ 859,818 60.7 % Subsystems and accessories 160,317 30.1 % 169,272 35.9 % 508,941 30.1 % 557,743 39.3 % Total $ 532,721 100.0 % $ 471,225 100.0 % $ 1,691,303 100.0 % $ 1,417,561 100.0 % Subsystems and accessories are comprised of serverboards, chassis and accessories. Server systems constitute an assembly of subsystems and accessories. One customer represented 10.2% and 12.6% of the Company's total net sales in the three and nine months ended March 31, 2016 and one customer represented 13.9% and 12.5% of the Company’s total net sales for the three and nine months ended March 31, 2015 , respectively. No country other than the United States represents greater than 10% of the Company’s total net sales in the three and nine months ended March 31, 2016 and 2015 . No customer accounted for 10% or more of the Company's accounts receivable as of March 31, 2016 and June 30, 2015 .

Prior Period Adjustment Recorde

Prior Period Adjustment Recorded in Current Period	9 Months Ended
	Mar. 31, 2016
Accounting Changes and Error Corrections [Abstract]
Prior Period Adjustment Recorded in Current Period	Prior Period Adjustment Recorded in Current Period In November 2015, the Company identified errors related to revenue which was recognized prior to meeting US GAAP revenue recognition criteria which impacted fiscal years 2013, 2014 and 2015. The Company determined that certain contracts for extended warranties on products were recorded as revenue at the time of sale of the product in prior periods instead of being deferred and amortized over the contractual warranty period. The cumulative impact of this error pertaining to prior periods through June 30, 2015 was to overstate net sales and net income by $9,259,000 and $5,926,000 , respectively. To compute the amount of the error, the Company determined a best estimated selling price for the extended warranty contracts based on prices charged to customers for these contracts when sold separately. This error was corrected in the first quarter ended September 30, 2015 by reducing net sales by $9,259,000 and net income by $5,926,000 , respectively. The Company assessed the materiality of these errors on each of the fiscal years ended June 30, 2013, 2014 and 2015, and concluded that the errors were not material to any of these periods. The Company also concluded that recording an out-of-period correction would not be material to the nine months ended March 31, 2016. Consequently, the accompanying condensed consolidated statement of operations for the nine months ended March 31, 2016 have been corrected.

Summary of Significant Accoun21

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Mar. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The condensed consolidated financial statements reflect the condensed consolidated balance sheets, results of operations, comprehensive income and cash flows of Super Micro Computer, Inc. and its wholly-owned subsidiaries (collectively, the “Company”). All intercompany accounts and transactions have been eliminated in consolidation. 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 (“SEC”) and include the accounts of the Company and its wholly-owned subsidiaries. Certain information and footnote disclosures normally included in financial statements prepared in accordance with United States generally accepted accounting principles have been condensed or omitted pursuant to such rules and regulations. These condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements for the fiscal year ended June 30, 2015 included in its Annual Report on Form 10-K/A, as filed with the SEC (the “Annual Report”). 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 condensed consolidated results of operations for the three and nine months ended March 31, 2016 are not necessarily indicative of the results that may be expected for future quarters or for the fiscal year ending June 30, 2016 . The Company consolidates its investment in Super Micro Asia Science and Technology Park, Inc. as it is a variable interest entity and the Company is the primary beneficiary. The noncontrolling interest is presented as a separate component from the Company's equity in the equity section of the condensed consolidated balance sheets. Net income attributable to the noncontrolling interest is not presented separately in the condensed consolidated statements of operations and is included in the general and administrative expenses as the amount is not material for any of the fiscal periods presented.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The Company accounts for certain assets and liabilities at fair value. Accounts receivable and accounts payable are carried at cost, which approximates fair value due to the short maturity of these instruments. Cash equivalents and long-term investments are carried at fair value. Short-term and long-term debt is carried at amortized cost, which approximates its fair value based on borrowing rates currently available to the Company for loans with similar terms. The hierarchy below lists three levels of fair value based on the extent to which inputs used in measuring fair value are observable in the market. The Company categorizes each of its fair value measurements in one of these three levels based on the lowest level input that is significant to the fair value measurement in its entirety. These levels are: • Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities; • Level 2 - Quoted prices in markets that are not active or financial instruments for which all significant inputs are observable, either directly or indirectly; and • Level 3 - Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable.
Net Income Per Common Share	Net Income Per Common Share The Company's basic earnings per share is computed by dividing income available to common stockholders by the weighted-average number of shares of common stock outstanding during the period. Diluted earnings per share is computed by dividing income available to common stockholders by the weighted-average number of shares of common stock outstanding during the period increased to include the number of additional shares of common stock that would have been outstanding if the potentially dilutive securities had been issued. Potentially dilutive securities include outstanding stock options and unvested restricted stock units (“RSUs”). The dilutive effect of potentially dilutive securities is reflected in diluted earnings per share by application of the treasury stock method. Under the treasury stock method, an increase in the fair market value of the Company’s common stock can result in a greater dilutive effect from potentially dilutive securities. Additionally, the exercise of employee stock options and the vesting of restricted stock units results in a further dilutive effect on net income per share.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (“FASB”) issued new accounting guidance related to revenue recognition. This new standard replaces all current U.S. GAAP guidance on revenue, eliminates all industry-specific guidance and provides a unified model in determining when and how revenue is recognized. The core principle is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Further, in March 2016, the FASB issued an amendment to the accounting guidance related to revenue from contracts with customers - principal versus agent considerations. In April 2016, the FASB issued an amendment to the accounting guidance related to revenue from contracts with customers - identifying performance obligations and licensing. These guidances can be applied either retrospectively or as a cumulative-effect adjustment as of the date of adoption. Early adoption is permitted for annual periods beginning after December 15, 2016. The new standard is effective for the Company on July 1, 2018. The Company is currently evaluating the effect the guidance will have on the Company's financial statement disclosures, results of operations and financial position. In April 2015, the FASB issued an amendment to the accounting guidance related to presentation of debt issuance costs. The amendment requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. In August 2015, the FASB issued an amendment to the accounting guidance related to presentation and subsequent measurement of debt issuance costs associated with line-of-credit arrangements. The amendment clarified that an entity may defer and present debt issuance costs associated with line-of-credit arrangements as an asset and subsequently amortize the deferred debt issuance costs ratably over the term of the line-of-credit arrangement, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement. The amendment is effective for the Company on July 1, 2016. The Company is currently evaluating the effect the amendment to the guidance will have on the Company's financial statement disclosures, results of operations and financial position. In July 2015, the FASB issued an amendment to the authoritative guidance related to inventory measurement. The amendment requires entities to measure inventory at the lower of cost and net realizable value thereby simplifying the current guidance under which an entity must measure inventory at the lower of cost or market. The amendment is effective for the Company on July 1, 2017. The Company is currently evaluating the effect the amendment to the guidance will have on the Company's financial statement disclosures, results of operations and financial position. In November 2015, the FASB issued an amendment to the accounting guidance related to balance sheet classification of deferred taxes. The amendment requires that all deferred tax assets and liabilities be classified as noncurrent in a classified balance sheet. Early adoption is permitted as of the beginning of an interim or annual reporting period. The amendment is effective for the Company on July 1, 2017. The Company is currently evaluating the effect the amendment to the guidance will have on the Company's financial statement disclosures, results of operations and financial position. In February 2016, the FASB issued an amendment to the accounting guidance related to leases. The amendment will supersede the existing lease guidance, including on-balance sheet recognition of operating leases for lessees. This amendment should be applied using a modified retrospective approach and is effective for the Company on July 1, 2018. Early adoption is permitted. The Company is currently evaluating the effect the guidance will have on its financial statement disclosures, results of operations and financial position. In March 2016, the FASB issued new accounting guidance on the accounting for certain aspects of share-based payment to employees, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements as well as classification in the statement of cash flows. This guidance is effective for us on July 1, 2017. The Company is currently evaluating the effect the guidance will have on its financial statement disclosures, results of operations and financial position.

Stock-based Compensation and 22

Stock-based Compensation and Stockholders' Equity (Tables)	9 Months Ended
	Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [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 and nine months ended March 31, 2016 and 2015 was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions: Three Months Ended Nine Months Ended 2016 2015 2016 2015 Risk-free interest rate 1.38% - 1.48% 1.35% - 1.58% 1.38% - 1.57% 1.35% - 1.76% Expected term 5.31 years 5.40 years 5.31 - 5.33 years 5.40 - 5.44 years Dividend yield — % — % — % — % Volatility 49.09% - 50.89% 47.60% - 48.26% 47.06% - 50.89% 46.93% - 49.31% Weighted-average fair value $ 12.99 $ 15.92 $ 12.04 $ 12.59
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 and nine months ended March 31, 2016 and 2015 (in thousands): Three Months Ended Nine Months Ended 2016 2015 2016 2015 Cost of sales $ 294 $ 222 $ 792 $ 651 Research and development 2,549 2,255 7,423 6,148 Sales and marketing 491 369 1,330 1,148 General and administrative 552 720 2,223 1,780 Stock-based compensation expense before taxes 3,886 3,566 11,768 9,727 Income tax impact (1,191 ) (1,355 ) (3,290 ) (2,747 ) Stock-based compensation expense, net $ 2,695 $ 2,211 $ 8,478 $ 6,980
Summary of stock option activity	The following table summarizes stock option activity during the nine months ended March 31, 2016 under all plans: Options Outstanding Weighted Average Exercise Price per Share Weighted Average Remaining Contractual Term (in Years) Aggregate Intrinsic Value (in thousands) Balance as of June 30, 2015 (7,208,475 shares exercisable at weighted average exercise price of $12.24 per share) 9,702,843 $ 14.21 Granted (weighted average fair value of $12.04) 279,650 $ 26.61 Exercised (897,424 ) $ 11.88 Forfeited (35,531 ) $ 18.85 Balance as of March 31, 2016 9,049,538 $ 14.81 5.43 $ 174,856 Options vested and expected to vest at March 31, 2016 8,956,079 $ 14.70 5.40 $ 174,044 Options vested and exercisable at March 31, 2016 7,346,160 $ 13.17 4.78 $ 153,798
Summary of restricted stock unit activity	The following table summarizes restricted stock unit activity during the nine months ended March 31, 2016 under all plans: Restricted Stock Units Outstanding Weighted Average Grant-Date Fair Value per Share Aggregate Intrinsic Value (in thousands) Balance as of June 30, 2015 303,324 $ 36.02 Granted 614,560 $ 28.35 Vested (102,918 ) $ 33.24 Forfeited (33,060 ) $ 30.52 Balance as of March 31, 2016 781,906 $ 30.59 $ 26,647

Net Income Per Common Share (Ta

Net Income Per Common Share (Tables)	9 Months Ended
	Mar. 31, 2016
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 share for the three and nine months ended March 31, 2016 (in thousands, except per share amounts): Three Months Ended Nine Months Ended 2016 2015 2016 2015 Numerator: Net income $ 16,662 $ 23,056 $ 65,050 $ 75,161 Denominator: Weighted-average shares outstanding 48,047 46,824 47,737 46,138 Effect of dilutive securities 4,191 5,184 3,900 4,964 Weighted-average diluted shares 52,238 52,008 51,637 51,102 Basic net income per share $ 0.35 $ 0.49 $ 1.36 $ 1.63 Diluted net income per share $ 0.32 $ 0.44 $ 1.26 $ 1.47

Balance Sheet Components (Table

Balance Sheet Components (Tables)	9 Months Ended
	Mar. 31, 2016
Balance Sheet Related Disclosures [Abstract]
Schedule of inventory	Inventory: March 31, June 30, Finished goods $ 356,966 $ 384,647 Work in process 32,281 23,214 Purchased parts and raw materials 90,029 55,632 Total inventory $ 479,276 $ 463,493
Schedule of property, plant, and equipment	Property, Plant, and Equipment: March 31, June 30, Land $ 70,454 $ 63,962 Buildings 71,665 51,959 Building and leasehold improvements 7,586 8,323 Buildings and leasehold improvements construction in progress (1) 10,895 25,572 Machinery and equipment 50,514 40,689 Furniture and fixtures 10,213 7,421 Purchased software 13,464 3,343 Purchased software construction in progress (2) 493 8,567 235,284 209,836 Accumulated depreciation and amortization (55,662 ) (46,798 ) Property, plant and equipment, net $ 179,622 $ 163,038 (1) In connection with the purchase of property located in San Jose, California for the Company's Green Computing Park, the Company continues to engage several contractors for the development and construction of improvements on the property. The first manufacturing building at this location was completed in August 2015. In the nine months ended March 31, 2016, the Company also engaged a contractor for the construction of improvements on leasehold property located in the Netherlands, which was completed in October 2015. (2) The Company completed its implementation of a new enterprise resource planning, or ERP, system for its U.S. headquarters on July 5, 2015 and for its subsidiaries in Taiwan and the Netherlands in January 2016. The Company has capitalized the costs of the new ERP software and certain expenses associated directly with the implementation of the ERP system as of January 2016 and began to depreciate these costs in the nine months ended March 31, 2016.
Schedule of other assets	Other Assets: March 31, June 30, Long-term deferred service costs $ 3,033 $ 1,490 Prepaid royalty license 810 997 Investment in a privately held company 1,411 1,411 Restricted cash 1,848 840 Deposits 924 265 Others 132 223 Total other assets $ 8,158 $ 5,226
Schedule of accrued liabilities	Accrued Liabilities: March 31, June 30, Accrued payroll and related expenses $ 15,574 $ 15,141 Customer deposits 6,255 6,314 Accrued warranty costs 5,634 7,700 Accrued cooperative marketing expenses 7,782 5,690 Deferred service revenue 10,816 4,085 Others 8,071 7,813 Total accrued liabilities $ 54,132 $ 46,743
Schedule of product warranties	Product Warranties: Three Months Ended Nine Months Ended 2016 2015 2016 2015 Balance, beginning of period $ 7,777 $ 6,960 $ 7,700 $ 7,083 Provision for warranty 3,685 3,968 12,229 10,928 Costs charged to accrual (3,872 ) (3,706 ) (10,545 ) (10,476 ) Change in estimated liability for pre-existing warranties (460 ) (13 ) (2,254 ) (326 ) Balance, end of period 7,130 7,209 7,130 7,209 Current portion (5,634 ) (7,209 ) (5,634 ) (7,209 ) Long-term portion $ 1,496 $ — $ 1,496 $ —

Fair Value Disclosure (Tables)

Fair Value Disclosure (Tables)	9 Months Ended
	Mar. 31, 2016
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 cash equivalents and long-term investments as of March 31, 2016 and June 30, 2015 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): March 31, 2016 Level 1 Level 2 Level 3 Asset at Fair Value Money market funds $ 312 $ — $ — $ 312 Auction rate securities — — 2,633 2,633 Total $ 312 $ — $ 2,633 $ 2,945 June 30, 2015 Level 1 Level 2 Level 3 Asset at Fair Value Money market funds $ 310 $ — $ — $ 310 Auction rate securities — — 2,633 2,633 Total $ 310 $ — $ 2,633 $ 2,943
Reconciliation of financial assets measured at fair value on a recurring basis	The following table provides a reconciliation of the Company’s financial assets measured at fair value on a recurring basis, consisting of long-term auction rate securities, using significant unobservable inputs (Level 3) for the three and nine months ended March 31, 2016 and 2015 (in thousands): Three Months Ended Nine Months Ended 2016 2015 2016 2015 Balance as of beginning of period $ 2,633 $ 2,647 $ 2,633 $ 2,647 Total realized gains or (losses) included in net income — — — — Total unrealized gains or (losses) included in other comprehensive income — — — — Sales and settlements at par — — — — Transfers in and/or out of Level 3 — — — — Balance as of end of period $ 2,633 $ 2,647 $ 2,633 $ 2,647
Summary of long-term investments	The following is a summary of the Company’s long-term investments as of March 31, 2016 and June 30, 2015 (in thousands): March 31, 2016 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value Auction rate securities $ 2,750 $ — $ (117 ) $ 2,633 June 30, 2015 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value Auction rate securities $ 2,750 $ — $ (117 ) $ 2,633

Short-term and Long-term Obli26

Short-term and Long-term Obligations (Tables)	9 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Schedule of short-term and long-term obligations	Short-term and long-term obligations as of March 31, 2016 and June 30, 2015 consisted of the following (in thousands): March 31, June 30, 2016 2015 Line of credit: Bank of America $ 62,199 $ 59,699 CTBC Bank 9,700 9,700 Total line of credit 71,899 69,399 Building term loans: Bank of America 1,633 3,733 CTBC Bank 20,263 21,280 Total building term loans 21,896 25,013 Total debt 93,795 94,412 Current portion (93,795 ) (93,479 ) Long-term portion $ — $ 933

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Mar. 31, 2016
Segment Reporting [Abstract]
Summary of net sales by geographic region	The following is a summary for the three and nine months ended March 31, 2016 and 2015 , of net sales by geographic region (in thousands): Three Months Ended Nine Months Ended 2016 2015 2016 2015 Net sales: United States $ 326,392 $ 273,631 $ 1,072,126 $ 803,757 Europe 93,279 88,259 294,239 269,404 Asia 78,544 74,772 241,595 241,785 Other 34,506 34,563 83,343 102,615 $ 532,721 $ 471,225 $ 1,691,303 $ 1,417,561
Summary of long-lived assets, excluding financial instruments, deferred tax assets, other assets, goodwill and intangible assets	The following is a summary of long-lived assets, excluding financial instruments, deferred tax assets, other assets, goodwill and intangible assets (in thousands): March 31, June 30, 2016 2015 Long-lived assets: United States $ 135,732 $ 124,292 Asia 40,627 37,695 Europe 3,263 1,051 $ 179,622 $ 163,038
Summary of net sales by product type	The following is a summary of net sales by product type (in thousands): Three Months Ended Nine Months Ended 2016 2015 2016 2015 Amount Percent of Net Sales Amount Percent of Net Sales Amount Percent of Amount Percent of Server systems $ 372,404 69.9 % $ 301,953 64.1 % $ 1,182,362 69.9 % $ 859,818 60.7 % Subsystems and accessories 160,317 30.1 % 169,272 35.9 % 508,941 30.1 % 557,743 39.3 % Total $ 532,721 100.0 % $ 471,225 100.0 % $ 1,691,303 100.0 % $ 1,417,561 100.0 %

Stock-based Compensation and 28

Stock-based Compensation and Stockholders' Equity - Equity Incentive Plan (Details) - shares	1 Months Ended
	Mar. 31, 2016	Mar. 08, 2016	Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding balance	9,049,538		9,702,843
Equity Incentive Plan, 2016, more than 10% ownership
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of fair market value	110.00%
Equity Incentive Plan, 2016, less than 10% ownership
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of fair market value	100.00%
Equity Incentive Plan, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance		4,700,000
Authorized shares available for future issuance	4,678,000
Equity Incentive Plan, 2016 | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option expected life	10 years
Equity Incentive Plan, 2016 | Employee stock options and restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Equity Incentive Plan, 2016 | Employee stock options and restricted stock units | Year one
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option and restricted stock units vesting rights, percentage	25.00%
Equity Incentive Plan, 2016 | Employee stock options and restricted stock units | Quarterly
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option and restricted stock units vesting rights, percentage	6.25%
Equity Incentive Plan, 2006
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding balance		8,696,444
Authorized shares available for future issuance		1,153,412

Stock-based Compensation and 29

Stock-based Compensation and Stockholders' Equity - Determining Fair Value (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected term	5 years 3 months 22 days	5 years 4 months 26 days
Dividend yield (as a percent)	0.00%	0.00%	0.00%	0.00%
Weighted-average fair value (in dollars per share)	$ 12.99	$ 15.92	$ 12.04	$ 12.59
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]
Stock-based compensation expense before taxes	$ 3,886	$ 3,566	$ 11,768	$ 9,727
Income tax impact	(1,191)	(1,355)	(3,290)	(2,747)
Stock-based compensation expense, net	2,695	2,211	8,478	6,980
Excess tax benefits accounted in additional paid-in capital			3,548	10,576
Excess tax benefit from financing activities			2,506	7,229
Employee stock option
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]
Unrecognized compensation cost related to non-vested stock-based awards	35,590		$ 35,590
Unrecognized compensation cost related to non-vested stock based awards, period for recognition			2 years 3 months 22 days
Cost of sales
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]
Stock-based compensation expense before taxes	294	222	$ 792	651
Research and development
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]
Stock-based compensation expense before taxes	2,549	2,255	7,423	6,148
Sales and marketing
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]
Stock-based compensation expense before taxes	491	369	1,330	1,148
General and administrative
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]
Stock-based compensation expense before taxes	$ 552	$ 720	$ 2,223	$ 1,780
Minimum
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Risk-free interest rate	1.38%	1.35%	1.38%	1.35%
Expected term			5 years 3 months 22 days	5 years 4 months 26 days
Volatility (as a percent)	49.09%	47.60%	47.06%	46.93%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Risk-free interest rate	1.48%	1.58%	1.57%	1.76%
Expected term			5 years 3 months 29 days	5 years 5 months 9 days
Volatility (as a percent)	50.89%	48.26%	50.89%	49.31%

Stock-based Compensation and 30

Stock-based Compensation and Stockholders' Equity - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Jun. 30, 2015
Options Outstanding
Balance at beginning of period (in shares)			9,702,843
Granted (in shares)			279,650
Exercised (in shares)			(897,424)
Forfeited (in shares)			(35,531)
Balance at end of period (in shares)	9,049,538		9,049,538
Options vested and expected to vest (in shares)	8,956,079		8,956,079
Options vested and exercisable (in shares)	7,346,160		7,346,160		7,208,475
Weighted Average Exercise Price per Share
Balance at beginning of period (in dollars per share)			$ 14.21
Granted (in dollars per share)			26.61
Exercised (in dollars per share)			11.88
Forfeited (in dollars per share)			18.85
Balance at end of period (in dollars per share)	$ 14.81		14.81
Options vested and expected to vest (in dollars per share)	14.70		14.70
Options vested and exercisable (in dollars per share)	13.17		13.17		$ 12.24
Weighted-average fair value (in dollars per share)	$ 12.99	$ 15.92	$ 12.04	$ 12.59
Weighted Average Remaining Contractual Term and Aggregate Intrinsic Value
Weighted average remaining contractual term, options outstanding			5 years 5 months 5 days
Weighted average remaining contractual term, options vested and expected to vest			5 years 4 months 24 days
Weighted average remaining contractual term, options vested and exercisable			4 years 9 months 10 days
Aggregate intrinsic value, options outstanding	$ 174,856		$ 174,856
Aggregate intrinsic value, options vested and expected to vest	174,044		174,044
Aggregate intrinsic value, options vested and exercisable	153,798		153,798
Total pretax intrinsic value of options exercised	$ 11,637	$ 22,231	$ 16,491	$ 44,301

Stock-based Compensation and 31

Stock-based Compensation and Stockholders' Equity - Restricted Stock Unit Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2016	Mar. 31, 2016	Mar. 31, 2015
Aggregate Intrinsic Value
Minimum tax withholding paid on behalf of employees for restricted stock units		$ 1,108	$ 0
Restricted stock units
Restricted Stock Units Outstanding
Balance at beginning of period (in shares)		303,324
Granted (in shares)		614,560
Vested (in shares)	(50,912)	(102,918)
Forfeited (in shares)		(33,060)
Balance at end of period (in shares)	781,906	781,906
Weighted Average Grant-Date Fair Value per Share
Balance at beginning of period (in dollars per share)		$ 36.02
Granted (in dollars per share)		28.35
Vested (in dollars per share)		33.24
Forfeited (in dollars per share)		30.52
Balance at end of period (in dollars per share)	$ 30.59	$ 30.59
Aggregate Intrinsic Value
Balance at end of period	$ 26,647	$ 26,647
Total pretax intrinsic value of restricted stock units vested	$ 1,579	$ 2,937
Shares withheld for taxes (in shares)	19,480	38,801
Minimum tax withholding paid on behalf of employees for restricted stock units	$ 604	$ 1,108

Net Income Per Common Share (De

Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Numerator:
Net income	$ 16,662	$ 23,056	$ 65,050	$ 75,161
Denominator:
Weighted-average shares outstanding (in shares)	48,047	46,824	47,737	46,138
Effect of dilutive securities (in shares)	4,191	5,184	3,900	4,964
Weighted-average diluted shares (in shares)	52,238	52,008	51,637	51,102
Basic net income per share (in dollars per share)	$ 0.35	$ 0.49	$ 1.36	$ 1.63
Diluted net income per share (in dollars per share)	$ 0.32	$ 0.44	$ 1.26	$ 1.47
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)	1,287	175	1,235	627

Balance Sheet Components - Inve

Balance Sheet Components - Inventory (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Jun. 30, 2015
Inventory, Net [Abstract]
Finished goods	$ 356,966		$ 356,966		$ 384,647
Work in process	32,281		32,281		23,214
Purchased parts and raw materials	90,029		90,029		55,632
Total inventory	479,276		479,276		$ 463,493
Provision for lower of cost or market and excess and obsolete inventory	$ 2,246	$ 287	$ 6,026	$ 4,462

Balance Sheet Components - Prop

Balance Sheet Components - Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Jun. 30, 2015
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 235,284	$ 209,836
Accumulated depreciation and amortization	(55,662)	(46,798)
Property, plant and equipment, net	179,622	163,038
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	70,454	63,962
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	71,665	51,959
Building and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	7,586	8,323
Buildings and leasehold improvements construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	10,895	25,572
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	50,514	40,689
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	10,213	7,421
Purchased software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	13,464	3,343
Purchased software construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 493	$ 8,567

Balance Sheet Components - Othe

Balance Sheet Components - Other Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Jun. 30, 2015
Other Assets, Noncurrent Disclosure [Abstract]
Long-term deferred service costs	$ 3,033	$ 1,490
Prepaid royalty license	810	997
Investment in a privately held company	1,411	1,411
Restricted cash	1,848	840
Deposits	924	265
Others	132	223
Total other assets	$ 8,158	$ 5,226

Balance Sheet Components - Accr

Balance Sheet Components - Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Jun. 30, 2015	Mar. 31, 2015
Balance Sheet Related Disclosures [Abstract]
Accrued payroll and related expenses	$ 15,574	$ 15,141
Customer deposits	6,255	6,314
Accrued warranty costs	5,634	7,700	$ 7,209
Accrued cooperative marketing expenses	7,782	5,690
Deferred service revenue	10,816	4,085
Others	8,071	7,813
Total accrued liabilities	$ 54,132	$ 46,743

Balance Sheet Components - Prod

Balance Sheet Components - Product Warranties (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Jun. 30, 2015
Product Warranties:
Balance, beginning of period	$ 7,777	$ 6,960	$ 7,700	$ 7,083
Provision for warranty	3,685	3,968	12,229	10,928
Costs charged to accrual	(3,872)	(3,706)	(10,545)	(10,476)
Change in estimated liability for pre-existing warranties	(460)	(13)	(2,254)	(326)
Balance, end of period	7,130	7,209	7,130	7,209
Current portion	(5,634)	(7,209)	(5,634)	(7,209)	$ (7,700)
Long-term portion	$ 1,496	$ 0	$ 1,496	$ 0

Long-term Investments (Details)

Long-term Investments (Details) - Auction rate securities - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Mar. 31, 2016	Jun. 30, 2015
Schedule of Available-for-sale Securities [Line Items]
Auction-rate securities, net of unrealized losses	$ 2,633	$ 2,633
Auction-rate securities, unrealized holding losses, gross	117	117
Auction-rate securities, unrealized holding losses, net of taxes	$ 70	$ 70
Discounted cash flow approach valuation technique
Schedule of Available-for-sale Securities [Line Items]
Fair value inputs, discount rate (as a percent)	1.81%
Fair value inputs, time period until redemption	3 years
Fair value inputs, estimated rate of return (as a percent)	0.41%
Fair value investment, increase or decrease in rate of return (as a percent)	1.00%
Fair value investment, increase or decrease in term	1 year
Discounted cash flow approach valuation technique | Minimum
Schedule of Available-for-sale Securities [Line Items]
Fair value, change in investment portfolio (as a percent)	1.00%
Discounted cash flow approach valuation technique | Maximum
Schedule of Available-for-sale Securities [Line Items]
Fair value, change in investment portfolio (as a percent)	3.00%

Fair Value Disclosure - Cash Eq

Fair Value Disclosure - Cash Equivalents and Long-term Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Jun. 30, 2015
Fair Value, Measurements, Recurring
Asset at Fair Value
Total	$ 2,945	$ 2,943
Fair Value, Measurements, Recurring | Level 1
Asset at Fair Value
Total	312	310
Fair Value, Measurements, Recurring | Level 2
Asset at Fair Value
Total	0	0
Fair Value, Measurements, Recurring | Level 3
Asset at Fair Value
Total	2,633	2,633
Money market funds | Fair Value, Measurements, Recurring
Asset at Fair Value
Cash and cash equivalents	312	310
Money market funds | Fair Value, Measurements, Recurring | Level 1
Asset at Fair Value
Cash and cash equivalents	312	310
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
Auction rate securities | Fair Value, Measurements, Recurring
Asset at Fair Value
Auction rate securities	2,633	2,633
Auction rate securities | Fair Value, Measurements, Recurring | Level 1
Asset at Fair Value
Auction rate securities	0	0
Auction rate securities | Fair Value, Measurements, Recurring | Level 2
Asset at Fair Value
Auction rate securities	0	0
Auction rate securities | Fair Value, Measurements, Recurring | Level 3
Asset at Fair Value
Auction rate securities	2,633	2,633
Cash
Asset at Fair Value
Cash and cash equivalents	175,873	94,901
Certificates of deposit
Asset at Fair Value
Certificates of deposit	$ 2,128	$ 1,130

Fair Value Disclosure - Assets

Fair Value Disclosure - Assets Measured on Recurring Basis Roll Forward (Details) - Level 3 - Fair Value, Measurements, Recurring - Auction rate securities - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance as of beginning of period	$ 2,633	$ 2,647	$ 2,633	$ 2,647
Total realized gains or (losses) included in net income	0	0	0	0
Total unrealized gains or (losses) included in other comprehensive income	0	0	0	0
Sales and settlements at par	0	0	0	0
Transfers in and/or out of Level 3	0	0	0	0
Balance as of end of period	$ 2,633	$ 2,647	$ 2,633	$ 2,647

Fair Value Disclosure - Long-te

Fair Value Disclosure - Long-term Investments (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Mar. 31, 2016	Jun. 30, 2015
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term and long-term debt	$ 93,795	$ 94,412
Auction rate securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	2,750	2,750
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	(117)	(117)
Fair Value	2,633	2,633
Auction rate securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 0	$ 0

Short-term and Long-term Obli42

Short-term and Long-term Obligations - Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Jun. 30, 2015
Line of Credit Facility [Line Items]
Total debt	$ 93,795	$ 94,412
Current portion	(93,795)	(93,479)
Long-term portion	0	933
Building term Loan
Line of Credit Facility [Line Items]
Total debt	21,896	25,013
Bank of America | Building term Loan
Line of Credit Facility [Line Items]
Total debt	1,633	3,733
Line of Credit | Revolving Credit Facility
Line of Credit Facility [Line Items]
Total debt	71,899	69,399
Line of Credit | Revolving Credit Facility | Bank of America
Line of Credit Facility [Line Items]
Total debt	62,199	59,699
Line of Credit | Revolving Credit Facility | CTBC Bank | CTBC 2014 Facility
Line of Credit Facility [Line Items]
Total debt	9,700	9,700
Building term Loan | CTBC Bank | CTBC 2014 Facility
Line of Credit Facility [Line Items]
Total debt	$ 20,263	$ 21,280

Short-term and Long-term Obli43

Short-term and Long-term Obligations - Bank of America (Details) - Bank of America	1 Months Ended	9 Months Ended
	Jun. 30, 2015USD ($)	Mar. 31, 2016USD ($)building
Minimum
Short-term Debt [Line Items]
Interest rate (as a percent)	0.79%	1.00%
Maximum
Short-term Debt [Line Items]
Interest rate (as a percent)	1.68%	1.94%
Line of Credit | Revolving Credit Facility
Short-term Debt [Line Items]
Credit facility, maximum borrowing capacity	$ 65,000,000
Line of credit, total outstanding balance	$ 59,699,000	$ 62,199,000
Credit facility, remaining borrowing capacity		$ 2,801,000
Line of Credit | Revolving Credit Facility | LIBOR
Short-term Debt [Line Items]
Credit facility, basis spread on variable rate (as a percent)		1.25%
LIBOR rate (as a percent)		0.44%
Term Loan
Short-term Debt [Line Items]
Credit facility, term	5 years
Term loan, face amount	$ 14,000,000
Number of buildings as collateral | building		3
Debt, total outstanding borrowings	$ 3,733,000	$ 1,633,000
Term Loan | LIBOR
Short-term Debt [Line Items]
Credit facility, basis spread on variable rate (as a percent)	1.50%

Short-term and Long-term Obli44

Short-term and Long-term Obligations - CTBC (Details)	1 Months Ended
	Apr. 30, 2016	Nov. 30, 2015USD ($)	Apr. 01, 2016USD ($)	Apr. 01, 2016TWD	Mar. 31, 2016USD ($)	Nov. 30, 2015TWD	Jun. 30, 2015USD ($)
Debt Instrument [Line Items]
Total debt					$ 93,795,000		$ 94,412,000
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Total debt					$ 71,899,000		$ 69,399,000
CTBC 2014 Facility | CTBC Bank
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity		$ 30,340,000				TWD 1,000,000,000
CTBC 2014 Facility | CTBC Bank | Minimum
Debt Instrument [Line Items]
Interest rate (as a percent)					0.92%		0.82%
CTBC 2014 Facility | CTBC Bank | Maximum
Debt Instrument [Line Items]
Interest rate (as a percent)					1.06%		1.16%
CTBC 2014 Facility | Term Loan | CTBC Bank
Debt Instrument [Line Items]
Line of credit, total outstanding balance					$ 20,263,000		$ 21,280,000
Total debt					20,263,000		21,280,000
CTBC 2014 Facility | Term Loan | CTBC Bank | Secured Debt
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity		$ 22,017,000				TWD 700,000,000
Credit facility, term		12 months
CTBC 2014 Facility | Term Loan | CTBC Bank | Secured Debt | CTBC's Established NTD Interest Rate
Debt Instrument [Line Items]
Credit facility, basis spread on variable rate (as a percent)		0.25%
CTBC 2014 Facility | Line of Credit | CTBC Bank | Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity		$ 17,000,000
Credit facility, term		12 months
Percent of eligible accounts receivable		80.00%				80.00%
Total debt					$ 9,700,000		$ 9,700,000
CTBC 2014 Facility | Line of Credit | CTBC Bank | Revolving Credit Facility | CTBC's Established USD Interest Rate
Debt Instrument [Line Items]
Credit facility, basis spread on variable rate (as a percent)		0.30%
Subsequent Event | CTBC 2016 Facility | CTBC Bank
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			$ 40,000,000
Subsequent Event | CTBC 2016 Facility | Term Loan | CTBC Bank | Secured Debt
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			21,620,000	TWD 700,000,000
Credit facility, term	12 months
Subsequent Event | CTBC 2016 Facility | Term Loan | CTBC Bank | Secured Debt | CTBC's Established NTD Interest Rate
Debt Instrument [Line Items]
Credit facility, basis spread on variable rate (as a percent)	0.25%
Subsequent Event | CTBC 2016 Facility | Term Loan | CTBC Bank | Customs Bond
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			$ 3,089,000	TWD 100,000,000
Debt Instrument, Interest Rate, Stated Percentage			0.50%	0.50%
Credit facility, term	12 months
Subsequent Event | CTBC 2016 Facility | Line of Credit | CTBC Bank | Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			$ 40,000,000
Credit facility, term	12 months
Percent of eligible accounts receivable			80.00%	80.00%
Subsequent Event | CTBC 2016 Facility | Line of Credit | CTBC Bank | Revolving Credit Facility | CTBC's Established USD Interest Rate
Debt Instrument [Line Items]
Credit facility, basis spread on variable rate (as a percent)	0.30%

Short-term and Long-term Obli45

Short-term and Long-term Obligations - Covenant Compliance (Details)	9 Months Ended
	Mar. 31, 2016USD ($)consecutive_quarterbuilding	Jun. 30, 2015USD ($)
Bank of America | Bank of America Credit Agreement
Debt Instrument [Line Items]
Debt Instrument, Credit Terms for Line of Credit and Term Loans | consecutive_quarter	2
Bank of America | Term Loan
Debt Instrument [Line Items]
Debt Instrument, Collateral Amount	$ 17,181,000	$ 17,354,000
Number of buildings as collateral | building	3
Line of Credit | Revolving Credit Facility | Bank of America
Debt Instrument [Line Items]
Debt Instrument, Collateral Amount	$ 1,137,023,000	1,045,408,000
Term Loan | CTBC Bank | CTBC 2014 Facility
Debt Instrument [Line Items]
Debt Instrument, Collateral Amount	$ 26,909,000	$ 27,047,000
Minimum | Bank of America | Bank of America Credit Agreement
Debt Instrument [Line Items]
Debt Instrument, Credit Terms for Line of Credit and Term Loans, Ratio	2
Debt Instrument, Credit Terms for Line of Credit and Term Loans, Market Value	$ 30,000,000

Related-party and Other Trans46

Related-party and Other Transactions (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	May. 31, 2012	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Jun. 30, 2015
Related Party Transaction [Line Items]
Net sales		$ 4,413	$ 6,067	$ 12,125	$ 43,524
Amounts receivable		6,034		6,034		$ 13,186
Amounts payable		45,357		45,357		59,015
Outstanding purchase order		$ 341,559		$ 341,559		378,341
Management Company | Super Micro Asia Science and Technology Park, Inc.
Related Party Transaction [Line Items]
Contribution in variable interest entity	$ 168
Ownership percentage of variable interest entity	50.00%
Compuware | Ablecom Technology | Ablecom | Maximum
Related Party Transaction [Line Items]
Ownership percentage		50.00%		50.00%
Super Micro Computer | Ablecom Technology | Investee
Related Party Transaction [Line Items]
Ownership percentage		0.30%		0.30%
Ablecom Technology | Ablecom
Related Party Transaction [Line Items]
Purchases		$ 55,133	58,002	$ 185,845	169,918
Net sales		4,413	6,067	12,125	43,524
Amounts receivable		6,034		6,034		13,186
Amounts payable		45,357		45,357		59,015
Tooling assets and miscellaneous costs paid to related party		3,003	231	5,901	4,728
Outstanding purchase order		$ 65,227		$ 65,227		$ 67,261
Ablecom Technology | Ablecom | Minimum
Related Party Transaction [Line Items]
Majority of invoiced dollars paid, number of days		34 days		46 days
Ablecom Technology | Ablecom | Maximum
Related Party Transaction [Line Items]
Majority of invoiced dollars paid, number of days		88 days		89 days
Ablecom Technology | Co-venturer | General and administrative expenses
Related Party Transaction [Line Items]
Net income (loss) attributable to noncontrolling interest		$ 13	$ 4	$ 9	$ (3)
Ablecom Technology | Charles Liang and Wife | Investee
Related Party Transaction [Line Items]
Ownership percentage		10.50%		10.50%
Ablecom Technology | Steve Liang and Other Family Members | Management and Immediate Family Member of Management
Related Party Transaction [Line Items]
Ownership percentage		36.00%		36.00%

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income tax provision	$ 7,386	$ 8,136	$ 28,951	$ 30,234
Effective tax rate (as a percent)	30.70%	26.10%	30.80%	28.70%
Income Tax Contingency [Line Items]
Unrecognized tax benefits that would impact effective tax rate, if recognized	$ 15,794		$ 15,794
Interest and penalties relating to unrecognized tax benefits	$ 1,010		1,010
Fiscal 2,016
Income Tax Contingency [Line Items]
U.S. federal R&D tax credit			4,384
Fiscal 2,015
Income Tax Contingency [Line Items]
U.S. federal R&D tax credit			$ 2,770

Commitments and Contingencies (

Commitments and Contingencies (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Jun. 30, 2015
Purchase commitments, hard disk drives
Purchase commitments, total	$ 341,559	$ 378,341
Hard Disk Drive Commitment
Purchase commitments, hard disk drives
Purchase commitments, total	$ 116,922

Segment Reporting - Net Sales b

Segment Reporting - Net Sales by Geographic Region (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2016USD ($)	Mar. 31, 2015USD ($)	Mar. 31, 2016USD ($)segment	Mar. 31, 2015USD ($)
Segment Reporting [Abstract]
Number of operating segments | segment			1
Segment Reporting Information [Line Items]
Net sales	$ 532,721	$ 471,225	$ 1,691,303	$ 1,417,561
United States
Segment Reporting Information [Line Items]
Net sales	326,392	273,631	1,072,126	803,757
Europe
Segment Reporting Information [Line Items]
Net sales	93,279	88,259	294,239	269,404
Asia
Segment Reporting Information [Line Items]
Net sales	78,544	74,772	241,595	241,785
Other
Segment Reporting Information [Line Items]
Net sales	$ 34,506	$ 34,563	$ 83,343	$ 102,615

Segment Reporting - Long-lived

Segment Reporting - Long-lived Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Jun. 30, 2015
Segment Reporting Information [Line Items]
Long-lived assets	$ 179,622	$ 163,038
United States
Segment Reporting Information [Line Items]
Long-lived assets	135,732	124,292
Asia
Segment Reporting Information [Line Items]
Long-lived assets	40,627	37,695
Europe
Segment Reporting Information [Line Items]
Long-lived assets	$ 3,263	$ 1,051

Segment Reporting - Net Sales51

Segment Reporting - Net Sales by Product Type (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Net sales	$ 532,721	$ 471,225	$ 1,691,303	$ 1,417,561
Product concentration risk | Net sales
Segment Reporting Information [Line Items]
Percent of Net Sales	100.00%	100.00%	100.00%	100.00%
Server systems
Segment Reporting Information [Line Items]
Net sales	$ 372,404	$ 301,953	$ 1,182,362	$ 859,818
Server systems | Product concentration risk | Net sales
Segment Reporting Information [Line Items]
Percent of Net Sales	69.90%	64.10%	69.90%	60.70%
Subsystems and accessories
Segment Reporting Information [Line Items]
Net sales	$ 160,317	$ 169,272	$ 508,941	$ 557,743
Subsystems and accessories | Product concentration risk | Net sales
Segment Reporting Information [Line Items]
Percent of Net Sales	30.10%	35.90%	30.10%	39.30%

Segment Reporting - Narrative (

Segment Reporting - Narrative (Details) - Customer Concentration Risk - customer	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Jun. 30, 2015
Net sales
Segment Reporting Information [Line Items]
Concentration, number of customers	1	1	1	1
Net sales | One customer
Segment Reporting Information [Line Items]
Concentration risk percentage	10.20%	13.90%	12.60%	12.50%
Accounts Receivable
Segment Reporting Information [Line Items]
Concentration, number of customers			0		0

Prior Period Adjustment Recor53

Prior Period Adjustment Recorded in Current Period (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended		36 Months Ended
	Mar. 31, 2016	Sep. 30, 2015	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Jun. 30, 2015
Error Corrections and Prior Period Adjustments [Line Items]
Net sales	$ 532,721		$ 471,225	$ 1,691,303	$ 1,417,561
Net income	$ 16,662		$ 23,056	$ 65,050	$ 75,161
Adjustment of net sales | Previously reported
Error Corrections and Prior Period Adjustments [Line Items]
Net sales						$ 9,259
Adjustment of net sales | Prior period adjustment
Error Corrections and Prior Period Adjustments [Line Items]
Net sales		$ (9,259)
Adjustment of net income | Previously reported
Error Corrections and Prior Period Adjustments [Line Items]
Net income						$ 5,926
Adjustment of net income | Prior period adjustment
Error Corrections and Prior Period Adjustments [Line Items]
Net income		$ (5,926)