Super Micro Computer (SMCI) 10-Q 6 Nov 14 2015 Q1 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	3 Months Ended
	Sep. 30, 2014	Oct. 30, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Sep-14	'
Document Fiscal Period Focus	'Q1	'
Document Fiscal Year Focus	'2015	'
Entity Registrant Name	'Super Micro Computer, Inc.	'
Entity Central Index Key	'0001375365	'
Current Fiscal Year End Date	'--06-30	'
Entity Filer Category	'Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	45,976,613

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2014	Jun. 30, 2014
In Thousands, unless otherwise specified
ASSETS	'	'
Cash and cash equivalents	$117,512	$96,872
Accounts receivable, net of allowances of $1,461 and $1,922 at September 30, 2014 and June 30, 2014, respectively (including amounts receivable from a related party of $2,416 and $621 at September 30, 2014 and June 30, 2014, respectively)	194,370	212,738
Inventory	341,541	315,837
Deferred income taxes-current	17,392	16,842
Prepaid income taxes	9,578	5,555
Prepaid expenses and other current assets	4,709	6,237
Total current assets	685,102	654,081
Long-term investments	2,647	2,647
Property, plant and equipment, net	133,067	130,589
Deferred income taxes-noncurrent	4,631	6,154
Other assets	2,828	2,854
Total assets	828,275	796,325
LIABILITIES AND STOCKHOLDERS' EQUITY	'	'
Accounts payable (including amounts due to a related party of $45,145 and $48,969 at September 30, 2014 and June 30, 2014, respectively)	222,556	219,354
Accrued liabilities	35,704	37,564
Income taxes payable	21,248	11,414
Short-term debt and current portion of long-term debt	34,446	42,554
Total current liabilities	313,954	310,886
Long-term debt-net of current portion	3,033	3,733
Other long-term liabilities	12,814	12,475
Total liabilities	329,801	327,094
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: 46,132,106 and 45,739,936 at September 30, 2014 and and June 30, 2014, respectively	207,442	199,062
Treasury stock (at cost), 445,028 shares at September 30, 2014 and June 30, 2014	-2,030	-2,030
Accumulated other comprehensive loss	-66	-63
Retained earnings	292,950	272,087
Total Super Micro Computer, Inc. stockholders’ equity	498,296	469,056
Noncontrolling interest	178	175
Total stockholders’ equity	498,474	469,231
Total liabilities and stockholders' equity	$828,275	$796,325

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2014	Jun. 30, 2014
In Thousands, except Share data, unless otherwise specified
Current Assets:	'	'
Accounts receivable, allowances	$1,461	$1,922
Accounts receivable, related party	2,416	621
Current Liabilities:	'	'
Accounts payable, related party	$45,145	$48,969
Stockholders' Equity	'	'
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	46,132,106	45,739,936
Treasury stock, shares	445,028	445,028

Condensed_Consolidated_Stateme

Condensed Consolidated Statements Of Operations (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Income Statement [Abstract]	'	'
Net sales (including related party sales of $26,578 and $3,528 in the three months ended September 30, 2014 and 2013, respectively)	$443,322	$309,016
Cost of sales (including related party purchases of $54,403 and $45,317 in the three months ended September 30, 2014 and 2013, respectively)	374,129	262,224
Gross profit	69,193	46,792
Operating expenses:	'	'
Research and development	21,509	20,236
Sales and marketing	11,002	8,865
General and administrative	5,056	5,648
Total operating expenses	37,567	34,749
Income from operations	31,626	12,043
Interest and other income, net	35	17
Interest expense	-196	-195
Income before income tax provision	31,465	11,865
Income tax provision	10,602	4,166
Net income	$20,863	$7,699
Net income per common share:	'	'
Basic (in dollars per share)	$0.46	$0.18
Diluted (in dollars per share)	$0.42	$0.17
Weighted-average shares used in calculation of net income per common share:	'	'
Basic (in shares)	45,473	42,496
Diluted (in shares)	49,687	44,602

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements Of Operations (Parenthetical) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Income Statement [Abstract]	'	'
Net sales, related party sales	$26,578	$3,528
Cost of sales, related party purchases	$54,403	$45,317

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]	'	'
Net income	$20,863	$7,699
Other comprehensive income, net of tax:	'	'
Foreign currency translation gain (loss)	-3	4
Unrealized gain (loss) on investments	0	0
Total other comprehensive income	-3	4
Comprehensive income	$20,860	$7,703

Condensed_Consolidated_Stateme3

Condensed Consolidated Statements Of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
OPERATING ACTIVITIES:	'	'
Net income	$20,863	$7,699
Reconciliation of net income to net cash provided by operating activities:	'	'
Depreciation and amortization	1,847	1,393
Stock-based compensation expense	2,980	2,589
Excess tax benefits from stock-based compensation	-705	-882
Allowance for doubtful accounts	-54	849
Provision for inventory	1,660	4
Exchange loss (gain)	-235	241
Deferred income taxes	973	91
Changes in operating assets and liabilities:	'	'
Accounts receivable, net (including changes in related party balances of $(1,795) and $(103) during the three months ended September 30, 2014 and 2013, respectively)	18,422	14,435
Inventory	-27,364	-144
Prepaid expenses and other assets	1,547	960
Accounts payable (including changes in related party balances of $(3,824) and $(7,948) during the three months ended September 30, 2014 and 2013, respectively)	2,131	-7,732
Income taxes payable, net	6,726	1,841
Accrued liabilities	-1,903	-3,207
Other long-term liabilities	158	170
Net cash provided by operating activities	27,046	18,307
INVESTING ACTIVITIES:	'	'
Restricted cash	10	-14
Purchases of property, plant and equipment	-2,766	-1,948
Net cash used in investing activities	-2,756	-1,962
FINANCING ACTIVITIES:	'	'
Proceeds from exercise of stock options	4,485	1,535
Minimum tax withholding paid on behalf of an officer for restricted stock awards	0	-651
Excess tax benefits from stock-based compensation	705	882
Repayment of debt	-8,500	-700
Payment of obligations under capital leases	-28	-5
Payments under receivable financing arrangements	-4	736
Net cash provided by (used in) financing activities	-3,342	1,797
Effect of exchange rate fluctuations on cash	-308	278
Net increase in cash and cash equivalents	20,640	18,420
Cash and cash equivalents at beginning of period	96,872	93,038
Cash and cash equivalents at end of period	117,512	111,458
Supplemental disclosure of cash flow information:	'	'
Cash paid for interest	202	200
Cash paid for taxes, net of refunds	3,123	1,807
Non-cash investing and financing activities:	'	'
Equipment purchased under capital leases	256	0
Accrued costs for property, plant and equipment purchases	$2,976	$1,836

Condensed_Consolidated_Stateme4

Condensed Consolidated Statements Of Cash Flows (Parenthetical) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Net cash provided by (used in) operating activities	'	'
Accounts receivable, changes in related party balances	($1,795)	($103)
Accounts payable, changes in related party balances	($3,824)	($7,948)

Summary_of_Significant_Account

Summary of Significant Accounting Policies	3 Months Ended
	Sep. 30, 2014
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, 2014 included in its Annual Report on Form 10-K, 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 months ended September 30, 2014 are not necessarily indicative of the results that may be expected for future quarters or for the fiscal year ending June 30, 2015.
	The Company consolidates its investment in Super Micro Business Park, Inc. as it is 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 restricted share awards subject to repurchase and settled in shares of common stock upon vesting have the nonforfeitable right to receive dividends on an equal basis with common stock and therefore are considered participating securities that must be included in the calculation of net income per share using the two-class method. Under the two-class method, basic and diluted net income per common share is determined by calculating net income per share for common stock and participating securities based on participation rights in undistributed earnings. Diluted net income per common share also considers the dilutive effect of in-the-money stock options, calculated using the treasury stock method. Under the treasury stock method, the amount of assumed proceeds from unexercised stock options includes the amount of compensation cost attributable to future services not yet recognized, assumed proceeds from the exercise of the options, and the incremental income tax benefit or liability as if the options were exercised during the period.
	Adoption of New Accounting Pronouncements
	In March 2013, the FASB issued authoritative guidance associated with a parent company’s accounting for the cumulative translation adjustment upon derecognition of certain subsidiaries or groups of assets within a foreign entity or of an investment in a foreign entity. The standard applies to the release of the cumulative translation adjustment into net income when a parent either sells a part or all of its investment in a foreign entity or no longer holds a controlling financial interest in a subsidiary or group of assets that is a business (other than a sale of in substance real estate or conveyance of oil and gas mineral rights) within a foreign entity. The adoption of this guidance did not have a material impact on the Company's results of operations or financial position.
	In July 2013, the FASB issued authoritative guidance associated with the presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss or a tax credit carryforward exists. It requires a liability related to an unrecognized tax benefit to offset a deferred tax asset for a net operating loss carryforward, a similar tax loss or a tax credit carryforward if a settlement is required or expected in the event the uncertain tax position is disallowed. The adoption of this guidance did not have a material impact on the Company's results of operations or financial position.
	In May 2014, the 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. This guidance can be applied either retrospectively or as a cumulative-effect adjustment as of the date of adoption. The new standard is effective for the Company on July 1, 2017. The Company is currently evaluating the effect the guidance will have on the Company's financial statement disclosures, results of operations or financial position.

StockBased_Compensation_And_St

Stock-Based Compensation And Stockholders' Equity	3 Months Ended
	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock-Based Compensation and Stockholders' Equity	'
	Stock-based Compensation and Stockholders’ Equity
	Equity Incentive Plan
	The authorized number of shares that may be issued under 2006 Equity Incentive Plan (the "2006 Plan") automatically increases on July 1 each year through 2016, by an amount equal to (a) 3.0% of shares of stock issued and outstanding on the immediately preceding June 30, or (b) a lesser amount determined by the Board of Directors. 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. 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 and options vest over four years; 25% at the end of one year and one sixteenth per quarter thereafter. The 2006 Plan is the successor equity incentive plan to the Company's 1998 Stock Option Plan. As of September 30, 2014, the Company had 1,369,499 authorized shares available for future issuance under the 2006 plan.
	Determining Fair Value
	Valuation and amortization method—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-based awards are expected to be outstanding and was determined based on an analysis of the relevant peer companies’ post-vest termination rates and the exercise factors for the stock options granted prior to June 30, 2011. For stock options granted after June 30, 2011, the expected term is 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—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 option.
	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 months ended September 30, 2014 and 2013 was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions:
		Three Months Ended
		September 30,
		2014			2013
	Risk-free interest rate	1.76		%	1.54		%
	Expected life	5.44 years			5.49 years
	Dividend yield	—		%	—		%
	Volatility	46.93		%	50.05		%
	Weighted-average fair value	$	11.75		$	5.48
	The following table shows total stock-based compensation expense included in the consolidated statements of operations for the three months ended September 30, 2014 and 2013 (in thousands):
		Three Months Ended
		September 30,
		2014			2013
	Cost of sales	$	207		$	235
	Research and development	1,896			1,561
	Sales and marketing	365			314
	General and administrative	512			479
	Stock-based compensation expense before taxes	2,980			2,589
	Income tax impact	(607		)	(288		)
	Stock-based compensation expense, net	$	2,373		$	2,301
	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 from financing activities. Excess tax benefits for stock options issued prior to July 1, 2006 are classified as cash from operating activities. The Company had $915,000 and $1,070,000 of excess tax benefits accounted in the Company’s additional paid-in capital in the three months ended September 30, 2014 and 2013, respectively. The Company had excess tax benefits that are classified as cash from financing activities of $705,000 and $882,000 in the three months ended September 30, 2014 and 2013, respectively, for options issued since July 1, 2006. Excess tax benefits for stock options issued prior to July 1, 2006 continue to be classified as cash from operating activities.
	Stock Option Activity
	The following table summarizes stock option activity during the three months ended September 30, 2014 under all stock option plans:
			Options		Weighted			Weighted	Aggregate
			Outstanding		Average			Average	Intrinsic
					Exercise			Remaining	Value
					Price per			Contractual	(in thousands)
					Share			Term
								(in Years)
	Balance as of June 30, 2014 (7,558,631 shares exercisable at weighted average exercise price of $11.05 per share)		10,905,602		12.24
	Granted		388,900		26.41
	Exercised		(392,170	)	11.44
	Forfeited		(44,584	)	17.8
	Balance as of September 30, 2014		10,857,748		$	12.76		6.17	$	180,911
	Options vested and expected to vest at September 30, 2014		10,613,802		$	12.63		6.1	$	178,165
	Options vested and exercisable at September 30, 2014		7,640,548		$	11.24		5.12	$	138,939
	The total pretax intrinsic value of options exercised during the three months ended September 30, 2014 and 2013 was $5,349,000 and $1,981,000, respectively. As of September 30, 2014, the Company’s total unrecognized compensation cost related to non-vested stock-based awards granted since July 1, 2006 to employees and non-employee directors was $20,300,000, which will be recognized over a weighted-average vesting period of approximately 2.37 years.
	Restricted Stock Award Activity
	The Company had no restricted stock award activity for the three months ended September 30, 2014. The total pretax intrinsic value of restricted stock awards vested was $2,337,000 for the three months ended September 30, 2013. In the three months ended September 30, 2013, upon vesting, 179,641 shares of restricted stock awards were partially net share-settled such that the Company withheld 50,000 shares, with value equivalent to an officer's minimum statutory obligation for the applicable income and other employment taxes, and remitted the cash to the appropriate taxing authorities. The total shares withheld was based on the value of the restricted stock awards on their vesting date as determined by the Company’s closing stock price. Total payments for an officer's tax obligations to the taxing authorities was $651,000 in the three months ended September 30, 2013, and is reflected as a financing activity within the 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. There is no unvested restricted stock awards at September 30, 2014.

Net_Income_Per_Common_Share

Net Income Per Common Share	3 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Net Income Per Common Share	'
	Net Income Per Common Share
	The computation of basic and diluted using the two-class method is as follows (in thousands, except per share amounts):
		Three Months Ended
		September 30,
		2014		2013
	Basic net income per common share calculation
	Net income	$	20,863	$	7,699
	Less: Undistributed earnings allocated to participating securities	—		(20		)
	Net income attributable to common shares—basic	$	20,863	$	7,679
	Weighted-average number of common shares used to compute basic net income per common share	45,473		42,496
	Basic net income per common share	$	0.46	$	0.18
	Diluted net income per common share calculation
	Net income	$	20,863	$	7,699
	Less: Undistributed earnings allocated to participating securities	—		(19		)
	Net income attributable to common shares—diluted	$	20,863	$	7,680
	Weighted-average number of common shares used to compute basic net income per common share	45,473		42,496
	Dilutive effect of options to purchase common stock	4,214		2,106
	Weighted-average number of common shares used to compute diluted net income per common share	49,687		44,602
	Diluted net income per common share	$	0.42	$	0.17
	For the three months ended September 30, 2014 and 2013, the Company had stock options 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 shares of common stock issuable upon exercise of such anti-dilutive outstanding stock options were 1,135,000 and 5,909,000 for the three months ended September 30, 2014 and 2013, respectively.

Balance_Sheet_Components

Balance Sheet Components	3 Months Ended
	Sep. 30, 2014
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:
		September 30,			June 30,
		2014			2014
	Finished goods	$	252,366		$	246,803
	Work in process	33,064			18,794
	Purchased parts and raw materials	56,111			50,240
	Total inventory	$	341,541		$	315,837
	The Company recorded a provision for lower of cost or market and excess and obsolete inventory totaling $1,660,000 and $4,000 in the three months ended September 30, 2014 and 2013, respectively.
	Property, Plant, and Equipment:
		September 30,			June 30,
		2014			2014
	Land	$	63,962		$	63,962
	Buildings	51,959			51,959
	Building and leasehold improvements	7,625			7,683
	Buildings construction in progress (1)	1,241			587
	Machinery and equipment	36,341			34,342
	Furniture and fixtures	6,293			5,892
	Purchased software	3,637			3,606
	Purchased software construction in progress (2)	3,741			2,548
		174,799			170,579
	Accumulated depreciation and amortization	(41,732		)	(39,990		)
	Property, plant and equipment, net	$	133,067		$	130,589
	(1) In connection with the purchase of the property located in San Jose, California, the Company engaged several contractors for the development and construction of improvements on the property, which is still in progress.
	(2) The Company continues its implementation of a new enterprise resource planning, or ERP, system and capitalized the costs of the new ERP software and certain expenses associated directly with the development of the ERP system, which is still in progress.
	Other Assets:
		September 30,			June 30,
		2014			2014
	Prepaid royalty license	$	1,184		$	1,246
	Restricted cash	440			450
	Investment in a privately held company	750			750
	Others	454			408
	Total other assets	$	2,828		$	2,854
	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 and bank guarantees in connection with office leases in the Netherlands.
	Accrued Liabilities:
		September 30,			June 30,
		2014			2014
	Accrued payroll and related expenses	$	11,521		$	11,624
	Customer deposits	4,800			4,185
	Accrued warranty costs	7,077			7,083
	Accrued cooperative marketing expenses	4,586			4,387
	Others	7,720			10,285
	Total accrued liabilities	$	35,704		$	37,564
	Product Warranties:
		Three Months Ended
		September 30,
		2014			2013
	Balance, beginning of period	$	7,083		$	6,472
	Provision for warranty	3,656			3,434
	Costs charged to accrual	(3,465		)	(3,351		)
	Change in estimated liability for pre-existing warranties	(197		)	45
	Balance, end of period	$	7,077		$	6,600

LongTerm_Investments

Long-Term Investments	3 Months Ended
	Sep. 30, 2014
Investments, Debt and Equity Securities [Abstract]	'
Long-Term Investments	'
	Long-term Investments
	As of September 30, 2014 and June 30, 2014, the Company held $2,647,000 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 AAA or AA2 at September 30, 2014 and June 30, 2014. 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 September 30, 2014 and June 30, 2014, $2,647,000 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 September 30, 2014 and June 30, 2014. 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 September 30, 2014, the discount rate, the time period until redemption and the estimated rate of return were 1.6%, 3 years and 0.3%, 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 there were no changes in fair value of its auction rate securities during the three months ended September 30, 2014 and 2013. There was a cumulative total decline of $103,000 as of September 30, 2014 and June 30, 2014. That amount has been recorded as a component of other comprehensive income. As of September 30, 2014 and June 30, 2014, the Company has recorded an accumulated unrealized loss of $62,000, 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 months ended September 30, 2014 and 2013, there was no auction rate securities redeemed or sold.

Fair_Value_Disclosure

Fair Value Disclosure	3 Months Ended
	Sep. 30, 2014
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 September 30, 2014 and June 30, 2014. 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 September 30, 2014 and June 30, 2014 which are measured at fair value on a recurring basis by level within the fair value hierarchy. These are classified based on the lowest level of input that is significant to the fair value measurement (in thousands):
	September 30, 2014	Level 1		Level 2		Level 3			Asset at
									Fair Value
	Money market funds	$	311	$	—	$	—		$	311
	Auction rate securities	—		—		2,647			2,647
	Total	$	311	$	—	$	2,647		$	2,958
	June 30, 2014	Level 1		Level 2		Level 3			Asset at
									Fair Value
	Money market funds	$	311	$	—	$	—		$	311
	Auction rate securities	—		—		2,647			2,647
	Total	$	311	$	—	$	2,647		$	2,958
	The above table excludes $116,967,000 and $96,324,000 of cash and $733,000 and $746,000 of certificates of deposit held by the Company as of September 30, 2014 and June 30, 2014, respectively. There were no transfers between Level 1, Level 2 or Level 3 securities in the three months ended September 30, 2014 and 2013.
	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 months ended September 30, 2014 and 2013 (in thousands):
		Three Months Ended
		September 30,
		2014		2013
	Balance as of beginning of period	$	2,647	$	2,637
	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	$	2,647	$	2,637
	The following is a summary of the Company’s long-term investments as of September 30, 2014 and June 30, 2014 (in thousands):
		September 30, 2014
		Amortized		Gross		Gross			Fair Value
		Cost		Unrealized		Unrealized
				Holding		Holding
				Gains		Losses
	Auction rate securities	$	2,750	$	—	$	(103	)	$	2,647
		June 30, 2014
		Amortized		Gross		Gross			Fair Value
		Cost		Unrealized		Unrealized
				Holding		Holding
				Gains		Losses
	Auction rate securities	$	2,750	$	—	$	(103	)	$	2,647
	The Company measures the fair value of outstanding debt for disclosure purposes on a recurring basis. As of September 30, 2014 and June 30, 2014, short-term and long-term debt of $37,479,000 and $46,287,000, respectively, are reported at amortized cost. This outstanding debt is classified as Level 2 as they are not actively traded and are 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.

ShortTerm_and_LongTerm_Obligat

Short-Term and Long-Term Obligations	3 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Short-term and Long-term Obligations	'
	Short-term and Long-term Obligations
	Short-term and long-term obligations as of September 30, 2014 and June 30, 2014 consisted of the following (in thousands):
		September 30,			June 30,
		2014			2014
	Line of credit:
	Bank of America	$	9,899		$	17,699
	Total line of credit	9,899			17,699
	Building term loans:
	Bank of America	5,833			6,533
	CTBC Bank	21,747			22,055
	Total building term loans	27,580			28,588
	Total debt	37,479			46,287
	Current portion	(34,446		)	(42,554		)
	Long-term portion	$	3,033		$	3,733
	Activities under Revolving Lines of Credit and Term Loans
	Bank of America
	In October 2011, 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 $40,000,000 revolving line of credit facility that matured on June 15, 2013 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. The credit agreement was subsequently amended to extend the maturity date of the revolving line of credit facility to November 15, 2014. 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 0.16% at September 30, 2014. For borrowings denominated in Taiwanese dollars, the interest rate is equal to the lender's established interest rate which is adjusted monthly.
	As of September 30, 2014 and June 30, 2014, the total outstanding borrowings under the Bank of America term loan was $5,833,000 and $6,533,000, respectively. The total outstanding borrowings under the Bank of America line of credit was $9,899,000 and $17,699,000 as of September 30, 2014 and June 30, 2014, respectively. The interest rates for these loans ranged from 1.19% to 1.66% per annum at September 30, 2014 and from 1.19% to 1.65% per annum at June 30, 2014, respectively. As of September 30, 2014, the unused revolving line of credit with Bank of America was $30,101,000.
	CTBC Bank
	In October 2011, the Company obtained an unsecured revolving line of credit from CTBC Bank Co., Ltd ("CTBC Bank", formerly, China Trust Bank) totaling NT$300,000,000 Taiwanese dollars or $9,898,000 U.S. dollars equivalents. In July 2012, the Company increased the credit facility to NT$450,000,000 Taiwanese dollars or $14,912,000 U.S. dollars equivalents. The term loan was secured by the land and building located in Bade, Taiwan with an interest rate equal to the lender’s established interest rate plus 0.30% which is adjusted monthly.
	In November 2013, the Company entered into an amendment to the existing credit agreement with CTBC Bank to increase the credit facility amount and extend the maturity date to November 30, 2014. The amendment provides for (i) a 13-month NT$700,000,000 or $23,787,000 U.S. dollar equivalents 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 13-month unsecured term loan up to NT$100,000,000 or $3,398,000 U.S. dollar equivalents, and a 13-month revolving line of credit up to 80% of eligible accounts receivable in an aggregate amount of up to NT$500,000,000 or $16,991,000 U.S. dollar equivalents with an interest rate equal to the lender's established NTD interest rate plus 0.25% per annum or lender's established USD interest rate plus 0.30% per annum which is adjusted monthly. The total borrowings allowed under the credit agreement is capped at NT$1,000,000,000 or $33,981,000 U.S. dollar equivalents.
	The total outstanding borrowings under the CTBC Bank term loan was denominated in Taiwanese dollars and was translated into U.S. dollars of $21,747,000 and $22,055,000 at September 30, 2014 and June 30, 2014, respectively. There were no outstanding borrowings under the CTBC Bank revolving line of credit at September 30, 2014 and June 30, 2014. The interest rate for the loan was at 1.16% and 1.15% per annum at September 30, 2014 and June 30, 2014, respectively. At September 30, 2014, NT$340,000,000 or $11,203,000 U.S. dollar equivalents were available for future borrowing under this credit agreement. The Company is currently negotiating with CTBC Bank to renew the credit agreement.
	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 September 30, 2014 and June 30, 2014, the total assets of $783,506,000 and $751,396,000, respectively collateralized the line of credit with Bank of America and were 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 September 30, 2014 and June 30, 2014, total assets collateralizing the term loan with Bank of America were $17,526,000 and $17,584,000, respectively. As of September 30, 2014, the Company was in compliance with all financial covenants associated with the credit agreement with Bank of America.
	As of September 30, 2014 and June 30, 2014, the land and building located in Bade, Taiwan collateralizing the term loan with CTBC Bank was $27,243,000 and $27,345,000, respectively. There are no financial covenants associated with the term loan with CTBC Bank at September 30, 2014.

RelatedParty_and_Other_Transac

Related-Party and Other Transactions	3 Months Ended
	Sep. 30, 2014
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 the 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 1.0% 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 35.9% of Ablecom at September 30, 2014.
	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 $54,403,000 and $45,317,000, and sold products to Ablecom totaling $26,578,000 and $3,528,000 for the three months ended September 30, 2014 and 2013, respectively.
	Amounts owed to the Company by Ablecom as of September 30, 2014 and June 30, 2014, were $2,416,000 and $621,000, respectively. Amounts owed to Ablecom by the Company as of September 30, 2014 and June 30, 2014, were $45,145,000 and $48,969,000, respectively. For the three months ended September 30, 2014 and 2013, the Company paid Ablecom the majority of invoiced dollars between 52 and 66 days of invoice date. For the three months ended September 30, 2014 and 2013, the Company paid $2,002,000 and $2,276,000, 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 $70,455,000 and $64,464,000 at September 30, 2014 and June 30, 2014, 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 Business 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 own 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 months ended September 30, 2014 and 2013, $3,000 and $(6,000) 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	3 Months Ended
	Sep. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	The Company recorded provisions for income taxes of $10,602,000 and $4,166,000 for the three months ended September 30, 2014 and 2013. The effective tax rate was 33.7% and 35.1% for the three months ended September 30, 2014 and 2013, respectively. The effective tax rate for the three months ended September 30, 2014 is estimated to be lower than the federal statutory rate primarily due to the benefit from disqualifying dispositions of shares issued upon exercise of incentive stock options and higher income taxed at foreign jurisdictions with lower tax rate, which are in part offset by the tax impact of federal research and development tax credits not being extended as of September 30, 2014.
	As of September 30, 2014, the Company had a liability for gross unrecognized tax benefits of $11,608,000, substantially all of which, if recognized, would affect the Company's effective tax rate. During the three months ended September 30, 2014, 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 September 30, 2014, the Company had accrued $960,000 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. The statutes of limitation in federal jurisdiction remain open in general for tax years 2011 through 2014. The state jurisdictions remain open in general for tax years 2010 through 2014. The Company's tax returns for its most significant foreign jurisdictions remain open for examination in general for tax years 2008 through 2014. The Company does not expect its unrecognized tax benefits to change materially over the next 12 months.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Sep. 30, 2014
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 2016. As of September 30, 2014, these remaining non-cancellable commitments were $226,532,000 compared to $211,090,000 as of June 30, 2014.
	Included in the above non-cancellable commitments are hard disk drive purchase commitments totaling approximately $29,224,000, which will be paid through December 2014. The Company 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	3 Months Ended
	Sep. 30, 2014
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 months ended September 30, 2014 and 2013, of net sales by geographic region (in thousands):
		Three Months Ended
		September 30,
		2014		2013
	Net sales:
	United States	$	243,378	$	175,214
	Europe	89,557		71,185
	Asia	88,438		54,972
	Other	21,949		7,645
		$	443,322	$	309,016
	The following is a summary of long-lived assets, excluding financial instruments, deferred tax assets, other assets, goodwill and intangible assets (in thousands):
		September 30,		June 30,
		2014		2014
	Long-lived assets:
	United States	$	95,792	$	94,119
	Asia	36,968		36,123
	Europe	307		347
		$	133,067	$	130,589
	The following is a summary of net sales by product type (in thousands):
		Three Months Ended
		September 30,
		2014				2013
		Amount		Percent of		Amount		Percent of
				Net Sales				Net Sales
	Server systems	$	255,609	57.7	%	$	143,283	46.4	%
	Subsystems and accessories	187,713		42.3	%	165,733		53.6	%
	Total	$	443,322	100	%	$	309,016	100	%
	Subsystems and accessories are comprised of serverboards, chassis and accessories. Server systems constitute an assembly of subsystems and accessories done by the Company. No customer represented greater than 10% of the Company’s total net sales nor did net sales in any country other than the United States represent greater than 10% of the Company’s total net sales in the three months ended September 30, 2014 and 2013. No customer accounted for 10% or more of the Company's accounts receivable as of September 30, 2014 and June 30, 2014.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Sep. 30, 2014
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, 2014 included in its Annual Report on Form 10-K, 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 months ended September 30, 2014 are not necessarily indicative of the results that may be expected for future quarters or for the fiscal year ending June 30, 2015.
	The Company consolidates its investment in Super Micro Business Park, Inc. as it is 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 restricted share awards subject to repurchase and settled in shares of common stock upon vesting have the nonforfeitable right to receive dividends on an equal basis with common stock and therefore are considered participating securities that must be included in the calculation of net income per share using the two-class method. Under the two-class method, basic and diluted net income per common share is determined by calculating net income per share for common stock and participating securities based on participation rights in undistributed earnings. Diluted net income per common share also considers the dilutive effect of in-the-money stock options, calculated using the treasury stock method. Under the treasury stock method, the amount of assumed proceeds from unexercised stock options includes the amount of compensation cost attributable to future services not yet recognized, assumed proceeds from the exercise of the options, and the incremental income tax benefit or liability as if the options were exercised during the period.
Adoption of New Accounting Pronouncements	'
	Adoption of New Accounting Pronouncements
	In March 2013, the FASB issued authoritative guidance associated with a parent company’s accounting for the cumulative translation adjustment upon derecognition of certain subsidiaries or groups of assets within a foreign entity or of an investment in a foreign entity. The standard applies to the release of the cumulative translation adjustment into net income when a parent either sells a part or all of its investment in a foreign entity or no longer holds a controlling financial interest in a subsidiary or group of assets that is a business (other than a sale of in substance real estate or conveyance of oil and gas mineral rights) within a foreign entity. The adoption of this guidance did not have a material impact on the Company's results of operations or financial position.
	In July 2013, the FASB issued authoritative guidance associated with the presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss or a tax credit carryforward exists. It requires a liability related to an unrecognized tax benefit to offset a deferred tax asset for a net operating loss carryforward, a similar tax loss or a tax credit carryforward if a settlement is required or expected in the event the uncertain tax position is disallowed. The adoption of this guidance did not have a material impact on the Company's results of operations or financial position.
	In May 2014, the 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. This guidance can be applied either retrospectively or as a cumulative-effect adjustment as of the date of adoption. The new standard is effective for the Company on July 1, 2017. The Company is currently evaluating the effect the guidance will have on the Company's financial statement disclosures, results of operations or financial position.

Recovered_Sheet1

Stock-Based Compensation and Stockholders' Equity (Tables)	3 Months Ended
	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	'
	The fair value of stock option grants for the three months ended September 30, 2014 and 2013 was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions:
		Three Months Ended
		September 30,
		2014			2013
	Risk-free interest rate	1.76		%	1.54		%
	Expected life	5.44 years			5.49 years
	Dividend yield	—		%	—		%
	Volatility	46.93		%	50.05		%
	Weighted-average fair value	$	11.75		$	5.48
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs	'
	The following table shows total stock-based compensation expense included in the consolidated statements of operations for the three months ended September 30, 2014 and 2013 (in thousands):
		Three Months Ended
		September 30,
		2014			2013
	Cost of sales	$	207		$	235
	Research and development	1,896			1,561
	Sales and marketing	365			314
	General and administrative	512			479
	Stock-based compensation expense before taxes	2,980			2,589
	Income tax impact	(607		)	(288		)
	Stock-based compensation expense, net	$	2,373		$	2,301
Schedule of Share-based Compensation, Stock Options, Activity	'
	The following table summarizes stock option activity during the three months ended September 30, 2014 under all stock option plans:
			Options		Weighted			Weighted	Aggregate
			Outstanding		Average			Average	Intrinsic
					Exercise			Remaining	Value
					Price per			Contractual	(in thousands)
					Share			Term
								(in Years)
	Balance as of June 30, 2014 (7,558,631 shares exercisable at weighted average exercise price of $11.05 per share)		10,905,602		12.24
	Granted		388,900		26.41
	Exercised		(392,170	)	11.44
	Forfeited		(44,584	)	17.8
	Balance as of September 30, 2014		10,857,748		$	12.76		6.17	$	180,911
	Options vested and expected to vest at September 30, 2014		10,613,802		$	12.63		6.1	$	178,165
	Options vested and exercisable at September 30, 2014		7,640,548		$	11.24		5.12	$	138,939

Net_Income_Per_Common_Share_Ta

Net Income Per Common Share (Tables)	3 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Schedule of Earnings Per Share, Basic and Diluted	'
	The computation of basic and diluted using the two-class method is as follows (in thousands, except per share amounts):
		Three Months Ended
		September 30,
		2014		2013
	Basic net income per common share calculation
	Net income	$	20,863	$	7,699
	Less: Undistributed earnings allocated to participating securities	—		(20		)
	Net income attributable to common shares—basic	$	20,863	$	7,679
	Weighted-average number of common shares used to compute basic net income per common share	45,473		42,496
	Basic net income per common share	$	0.46	$	0.18
	Diluted net income per common share calculation
	Net income	$	20,863	$	7,699
	Less: Undistributed earnings allocated to participating securities	—		(19		)
	Net income attributable to common shares—diluted	$	20,863	$	7,680
	Weighted-average number of common shares used to compute basic net income per common share	45,473		42,496
	Dilutive effect of options to purchase common stock	4,214		2,106
	Weighted-average number of common shares used to compute diluted net income per common share	49,687		44,602
	Diluted net income per common share	$	0.42	$	0.17

Balance_Sheet_Components_Balan

Balance Sheet Components - Balance Sheet Components (Tables)	3 Months Ended
	Sep. 30, 2014
Balance Sheet Related Disclosures [Abstract]	'
Schedule of Inventory, Current	'
	The following tables provide details of the selected balance sheet items (in thousands):
	Inventory:
		September 30,			June 30,
		2014			2014
	Finished goods	$	252,366		$	246,803
	Work in process	33,064			18,794
	Purchased parts and raw materials	56,111			50,240
	Total inventory	$	341,541		$	315,837
Property, Plant and Equipment	'
	Property, Plant, and Equipment:
		September 30,			June 30,
		2014			2014
	Land	$	63,962		$	63,962
	Buildings	51,959			51,959
	Building and leasehold improvements	7,625			7,683
	Buildings construction in progress (1)	1,241			587
	Machinery and equipment	36,341			34,342
	Furniture and fixtures	6,293			5,892
	Purchased software	3,637			3,606
	Purchased software construction in progress (2)	3,741			2,548
		174,799			170,579
	Accumulated depreciation and amortization	(41,732		)	(39,990		)
	Property, plant and equipment, net	$	133,067		$	130,589
	(1) In connection with the purchase of the property located in San Jose, California, the Company engaged several contractors for the development and construction of improvements on the property, which is still in progress.
	(2) The Company continues its implementation of a new enterprise resource planning, or ERP, system and capitalized the costs of the new ERP software and certain expenses associated directly with the development of the ERP system, which is still in progress.
Schedule of Other Assets	'
	Other Assets:
		September 30,			June 30,
		2014			2014
	Prepaid royalty license	$	1,184		$	1,246
	Restricted cash	440			450
	Investment in a privately held company	750			750
	Others	454			408
	Total other assets	$	2,828		$	2,854
Schedule of Accrued Liabilities	'
	Accrued Liabilities:
		September 30,			June 30,
		2014			2014
	Accrued payroll and related expenses	$	11,521		$	11,624
	Customer deposits	4,800			4,185
	Accrued warranty costs	7,077			7,083
	Accrued cooperative marketing expenses	4,586			4,387
	Others	7,720			10,285
	Total accrued liabilities	$	35,704		$	37,564
Schedule of Product Warranty Liability	'
	Product Warranties:
		Three Months Ended
		September 30,
		2014			2013
	Balance, beginning of period	$	7,083		$	6,472
	Provision for warranty	3,656			3,434
	Costs charged to accrual	(3,465		)	(3,351		)
	Change in estimated liability for pre-existing warranties	(197		)	45
	Balance, end of period	$	7,077		$	6,600

Fair_Value_Disclosure_Tables

Fair Value Disclosure (Tables)	3 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Schedule of Fair Value, Cash Equivalents and Long-term Investments Measured on Recurring Basis	'
	The following table sets forth the Company’s cash equivalents and long-term investments as of September 30, 2014 and June 30, 2014 which are measured at fair value on a recurring basis by level within the fair value hierarchy. These are classified based on the lowest level of input that is significant to the fair value measurement (in thousands):
	September 30, 2014	Level 1		Level 2		Level 3			Asset at
									Fair Value
	Money market funds	$	311	$	—	$	—		$	311
	Auction rate securities	—		—		2,647			2,647
	Total	$	311	$	—	$	2,647		$	2,958
	June 30, 2014	Level 1		Level 2		Level 3			Asset at
									Fair Value
	Money market funds	$	311	$	—	$	—		$	311
	Auction rate securities	—		—		2,647			2,647
	Total	$	311	$	—	$	2,647		$	2,958
Schedule of Financial Assets Measured at Fair Value on 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 months ended September 30, 2014 and 2013 (in thousands):
		Three Months Ended
		September 30,
		2014		2013
	Balance as of beginning of period	$	2,647	$	2,637
	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	$	2,647	$	2,637
Schedule of Long-term Investments Reconciliation	'
	The following is a summary of the Company’s long-term investments as of September 30, 2014 and June 30, 2014 (in thousands):
		September 30, 2014
		Amortized		Gross		Gross			Fair Value
		Cost		Unrealized		Unrealized
				Holding		Holding
				Gains		Losses
	Auction rate securities	$	2,750	$	—	$	(103	)	$	2,647
		June 30, 2014
		Amortized		Gross		Gross			Fair Value
		Cost		Unrealized		Unrealized
				Holding		Holding
				Gains		Losses
	Auction rate securities	$	2,750	$	—	$	(103	)	$	2,647

ShortTerm_and_LongTerm_Obligat1

Short-Term and Long-Term Obligations (Tables)	3 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Schedule of Short-term and Long-term Obligations	'
	Short-term and long-term obligations as of September 30, 2014 and June 30, 2014 consisted of the following (in thousands):
		September 30,			June 30,
		2014			2014
	Line of credit:
	Bank of America	$	9,899		$	17,699
	Total line of credit	9,899			17,699
	Building term loans:
	Bank of America	5,833			6,533
	CTBC Bank	21,747			22,055
	Total building term loans	27,580			28,588
	Total debt	37,479			46,287
	Current portion	(34,446		)	(42,554		)
	Long-term portion	$	3,033		$	3,733

Schedule_of_Segment_Reporting_

Schedule of Segment Reporting Information, by Segment (Tables)	3 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
Summary of Net Sales by Geographic Region	'
	International net sales are based on the country and region to which the products were shipped. The following is a summary for the three months ended September 30, 2014 and 2013, of net sales by geographic region (in thousands):
		Three Months Ended
		September 30,
		2014		2013
	Net sales:
	United States	$	243,378	$	175,214
	Europe	89,557		71,185
	Asia	88,438		54,972
	Other	21,949		7,645
		$	443,322	$	309,016
Summary of Long-Lived Assets	'
	The following is a summary of long-lived assets, excluding financial instruments, deferred tax assets, other assets, goodwill and intangible assets (in thousands):
		September 30,		June 30,
		2014		2014
	Long-lived assets:
	United States	$	95,792	$	94,119
	Asia	36,968		36,123
	Europe	307		347
		$	133,067	$	130,589
Summary of Net Sales by Products Type	'
	The following is a summary of net sales by product type (in thousands):
		Three Months Ended
		September 30,
		2014				2013
		Amount		Percent of		Amount		Percent of
				Net Sales				Net Sales
	Server systems	$	255,609	57.7	%	$	143,283	46.4	%
	Subsystems and accessories	187,713		42.3	%	165,733		53.6	%
	Total	$	443,322	100	%	$	309,016	100	%

StockBased_Compensation_And_St1

Stock-Based Compensation And Stockholders' Equity - Equity Incentive Plan (Details)	3 Months Ended
	Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Authorized shares available for future issuance under the 2006 Plan	1,369,499
Equity Incentive Plan, 2006 [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Increase in number of shares of common stock reserved for issuance under the 2006 Plan	3.00%
Equity Incentive Plan, 2006, More Than 10% Ownership [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Percentage of fair market value	110.00%
Equity Incentive Plan, 2006, Less Than 10% Ownership [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Percentage of fair market value	100.00%
Stock Options [Member] | Equity Incentive Plan, 2006 [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Vesting period	'4 years
Stock option expected life	'10 years
Stock Options [Member] | Year One | Equity Incentive Plan, 2006 [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Stock option vesting rights, percentage	25.00%
Stock Options [Member] | Quarterly | Equity Incentive Plan, 2006 [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Stock option vesting rights, percentage	6.25%

StockBased_Compensation_And_St2

Stock-Based Compensation And Stockholders' Equity - Determining Fair Value (Details) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Risk-free interest rate	1.76%	1.54%
Expected life	'5 years 5 months 9 days	'5 years 5 months 28 days
Dividend yield	0.00%	0.00%
Volatility	46.93%	50.05%
Weighted average fair value	$11.75	$5.48
Stock-based compensation expense before taxes	$2,980	$2,589
Income tax impact	-607	-288
Stock-based compensation expense, net	2,373	2,301
Excess tax benefits accounted in additional paid-in capital	915	1,070
Excess tax benefit from financing activities	705	882
Cost of sales [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Stock-based compensation expense before taxes	207	235
Research and development [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Stock-based compensation expense before taxes	1,896	1,561
Sales and marketing [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Stock-based compensation expense before taxes	365	314
General and administrative [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Stock-based compensation expense before taxes	$512	$479

StockBased_Compensation_And_St3

Stock-Based Compensation And Stockholders' Equity - Summary of Stock Option Activity (Table) (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]	'	'
Beginning Balance, number of shares outstanding	10,905,602	'
Number of shares, stock options granted	388,900	'
Number of shares, options exercised	-392,170	'
Number of shares, options forfeited	-44,584	'
Ending Balance, number of shares outstanding	10,857,748	'
Number of shares options vested and expected to vest	10,613,802	'
Number of shares options vested and exercisable	7,640,548	7,558,631
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]	'	'
Beginning Balance, weighted average exercise price per share, options outstanding	$12.24	'
Weighted average exercise price per share, options granted	$26.41	'
Weighted average exercise price per share, options exercised	$11.44	'
Weighted average exercise price per share, options forfeited	$17.80	'
Ending Balance, weighted average exercise price per share, options outstanding	$12.76	'
Weighted average exercise price per share, options vested and expected to vest	$12.63	'
Weighted average exercise price per share, options exercisable	$11.24	$11.05
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]	'	'
Balance, weighted average remaining contractual term of options outstanding	'6 years 2 months 0 days	'
Weighted average remaining contractual term, options vested and expected to vest	'6 years 1 month 6 days	'
Weighted average remaining contractual term, options vested and exercisable	'5 years 1 month 12 days	'
Balance, aggregate intrinsic value of options outstanding	$180,911	'
Aggregate intrinsic value of options vested and expected to vest	178,165	'
Aggregate intrinsic value of options vested and exercisable	$138,939	'

StockBased_Compensation_And_St4

Stock-Based Compensation And Stockholders' Equity - Stock Option and Restricted Stock Award Activity (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Total pretax intrinsic value of options exercised	$5,349	$1,981
Payments related to tax withholding for share-based compensation	0	651
Stock Options [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Unrecognized compensation cost related to non-vested stock-based awards	20,300	'
Unrecognized compensation cost related to non-vested stock based awards, period for recognition	'2 years 4 months 13 days	'
Restricted Stock [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Total pretax intrinsic value of restricted stock awards vested	'	2,337
Restricted stock awards vested, shares	'	179,641
Officer [Member] | Restricted Stock [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Shares withheld for taxes	'	50,000
Payments related to tax withholding for share-based compensation	'	$651

Net_Income_Per_Common_Share_Ne

Net Income Per Common Share - Net Income Per Common Share (Details) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Earnings Per Share, Basic [Abstract]	'	'
Net income	$20,863	$7,699
Less: Undistributed earnings allocated to participating securities	0	-20
Net income attributable to common shares—basic	20,863	7,679
Weighted-average number of common shares used to compute basic net income per common share	45,473	42,496
Basic (in dollars per share)	$0.46	$0.18
Earnings Per Share, Diluted [Abstract]	'	'
Net income	20,863	7,699
Less: Undistributed earnings allocated to participating securities	0	-19
Net income attributable to common shares—diluted	20,863	7,680
Dilutive effect of options to purchase common stock	$4,214	$2,106
Weighted-average number of common shares used to compute diluted net income per common share	49,687	44,602
Diluted net income per common share	$0.42	$0.17
Stock Options [Member]	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Anti-dilutive outstanding stock options, shares	1,135	5,909

Balance_Sheet_Components_Inven

Balance Sheet Components - Inventory (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014
Balance Sheet Related Disclosures [Abstract]	'	'	'
Finished goods	$252,366	'	$246,803
Work in process	33,064	'	18,794
Purchased parts and raw materials	56,111	'	50,240
Total inventory	341,541	'	315,837
Provision for inventory	$1,660	$4	'

Balance_Sheet_Components_Prope

Balance Sheet Components - Property, Plant and Equipment (Details) (USD $)	Sep. 30, 2014	Jun. 30, 2014
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]	'	'
Property, plant and equipment, gross	$174,799	$170,579
Accumulated depreciation and amortization	-41,732	-39,990
Property, plant and equipment, net	133,067	130,589
Land [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant and equipment, gross	63,962	63,962
Buildings [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant and equipment, gross	51,959	51,959
Building and leasehold improvements [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant and equipment, gross	7,625	7,683
Buildings construction in progress [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant and equipment, gross	1,241	587
Machinery and equipment [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant and equipment, gross	36,341	34,342
Furniture and fixtures [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant and equipment, gross	6,293	5,892
Purchased software [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant and equipment, gross	3,637	3,606
Purchased software construction in progress [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant and equipment, gross	$3,741	$2,548

Balance_Sheet_Components_Other

Balance Sheet Components - Other Assets (Details) (USD $)	Sep. 30, 2014	Jun. 30, 2014
In Thousands, unless otherwise specified
Balance Sheet Related Disclosures [Abstract]	'	'
Prepaid royalty license	$1,184	$1,246
Restricted cash	440	450
Investment in a privately held company	750	750
Others	454	408
Total other assets	$2,828	$2,854

Balance_Sheet_Components_Accru

Balance Sheet Components - Accrued Liabilities (Details) (USD $)	Sep. 30, 2014	Jun. 30, 2014
In Thousands, unless otherwise specified
Balance Sheet Related Disclosures [Abstract]	'	'
Accrued payroll and related expenses	$11,521	$11,624
Customer deposits	4,800	4,185
Accrued warranty costs	7,077	7,083
Accrued cooperative marketing expenses	4,586	4,387
Others	7,720	10,285
Total accrued liabilities	$35,704	$37,564

Balance_Sheet_Components_Produ

Balance Sheet Components - Product Warranties (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Product Warranties:	'	'
Balance, beginning of period	$7,083	$6,472
Provision for warranty	3,656	3,434
Costs charged to accrual	-3,465	-3,351
Change in estimated liability for pre-existing warranties	-197	45
Balance, end of period	$7,077	$6,600

LongTerm_Investments_Details

Long-Term Investments (Details) (Auction rate securities [Member], USD $)	3 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Auction-rate securities, net of unrealized losses	$2,647,000	'	$2,647,000
Auction-rate securities, unrealized gains (losses), period impact	0	0	'
Auction-rate securities, unrealized holding losses, gross	103,000	'	103,000
Auction-rate securities, unrealized holding loss, net of taxes	62,000	'	62,000
Auction rate securities, redeemed at par	$0	$0	'
Discounted Cash Flow Approach Valuation Technique [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Fair value inputs, discount rate	1.60%	'	'
Fair value inputs, time period until redemption	'3 years	'	'
Fair value inputs, estimated rate of return	0.30%	'	'
Fair value investment, increase or decrease in rate of return	1.00%	'	'
Fair value investment, increase or decrease in term	'1 year	'	'
Discounted Cash Flow Approach Valuation Technique [Member] | Minimum [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Fair value, change in investment portfolio	1.00%	'	'
Discounted Cash Flow Approach Valuation Technique [Member] | Maximum [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Fair value, change in investment portfolio	3.00%	'	'

Fair_Value_Disclosure_Details

Fair Value Disclosure (Details) (USD $)	Sep. 30, 2014	Jun. 30, 2014
In Thousands, unless otherwise specified
Fair Value, Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets, fair value	$2,958	$2,958
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets, fair value	311	311
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets, fair value	0	0
Debt Disclosure [Abstract]	'	'
Short-term and long-term debt, fair value	37,479	46,287
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets, fair value	2,647	2,647
Money market funds [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and cash equivalents, fair value	311	311
Money market funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and cash equivalents, fair value	311	311
Money market funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and cash equivalents, fair value	0	0
Money market funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and cash equivalents, fair value	0	0
Auction rate securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Auction rate securities, fair value	2,647	2,647
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]	'	'
Auction rate securities, amortized cost	2,750	2,750
Auction rate securities, gross unrealized holding gains	0	0
Auction rate securities, gross unrealized holding losses	-103	-103
Auction rate securities, fair value	2,647	2,647
Auction rate securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Auction rate securities, fair value	2,647	2,647
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]	'	'
Auction rate securities, fair value	2,647	2,647
Auction rate securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Auction rate securities, fair value	0	0
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]	'	'
Auction rate securities, fair value	0	0
Auction rate securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Auction rate securities, fair value	0	0
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]	'	'
Auction rate securities, fair value	0	0
Auction rate securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Auction rate securities, fair value	2,647	2,647
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]	'	'
Auction rate securities, fair value	2,647	2,647
Cash [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and cash equivalents, fair value	116,967	96,324
Certificates of Deposit [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Certificates of deposit, fair value	$733	$746

Fair_Value_Disclosure_Assets_M

Fair Value Disclosure - Assets Measured on Recurring Basis Roll Forward (Details) (Fair Value, Inputs, Level 3 [Member], Fair Value, Measurements, Recurring [Member], Auction rate securities [Member], USD $)	3 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Auction rate securities [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'
Balance, beginning of the period	$2,647	$2,637
Total realized gains or (losses) included in net income	0	0
Total unrealized gains or (losses) included in other comprehensive income	0	0
Sales and settlements at par	0	0
Transfers in and/or out of Level 3	0	0
Balance, ending of the period	$2,647	$2,637

ShortTerm_and_LongTerm_Obligat2

Short-Term and Long-Term Obligations - Short-Term and Long-term Debt (Details) (USD $)	Sep. 30, 2014	Jun. 30, 2014
Short-term Debt [Line Items]	'	'
Short-term debt	$9,899,000	$17,699,000
Debt Instrument [Line Items]	'	'
Total debt	37,479,000	46,287,000
Debt, current portion	-34,446,000	-42,554,000
Debt, long-term portion	3,033,000	3,733,000
Term Loan [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term debt	27,580,000	28,588,000
Bank of America [Member] | Term Loan [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term debt	5,833,000	6,533,000
CTBC [Member] | CTBC 2013 Facility [Member] | Term Loan [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term debt	21,747,000	22,055,000
Revolving Credit Facility [Member] | Line of Credit [Member] | Bank of America [Member]	'	'
Short-term Debt [Line Items]	'	'
Short-term debt	$9,899,000	$17,699,000

ShortTerm_and_LongTerm_Obligat3

Short-Term and Long-Term Obligations - Short-term Obligations (Details) (USD $)	Sep. 30, 2014	Jun. 30, 2014	Sep. 30, 2014	Jun. 30, 2014	Sep. 30, 2014
In Thousands, unless otherwise specified			Bank of America [Member]	Bank of America [Member]	London Interbank Offered Rate (LIBOR) [Member]
			Revolving Credit Facility [Member]	Revolving Credit Facility [Member]	Bank of America [Member]
			Line of Credit [Member]	Line of Credit [Member]	Revolving Credit Facility [Member]
					Line of Credit [Member]
Short-term Debt [Line Items]	'	'	'	'	'
Credit facility, basis spread on variable rate	'	'	'	'	1.25%
LIBOR rate	'	'	'	'	0.16%
Line of credit, total outstanding balance	$9,899	$17,699	$9,899	$17,699	'
Credit facility, remaining borrowing capacity	'	'	$30,101	'	'

ShortTerm_and_LongTerm_Obligat4

Short-Term and Long-Term Obligations - Long-Term Obligations (Details)

Sep. 30, 2014

Jun. 30, 2014

Sep. 30, 2014

Jun. 30, 2014

Oct. 30, 2011

Oct. 30, 2011

Sep. 30, 2014

Sep. 30, 2014

Nov. 30, 2013

Nov. 30, 2013

Oct. 31, 2011

Nov. 30, 2013

Nov. 30, 2013

Sep. 30, 2014

Jun. 30, 2014

Nov. 30, 2013

Nov. 30, 2013

Sep. 30, 2014

Jun. 30, 2014

Oct. 31, 2011

Sep. 30, 2014

Jun. 30, 2014

Oct. 31, 2011

Oct. 31, 2011

Jul. 31, 2012

Jul. 31, 2012

Sep. 30, 2014

Jun. 30, 2014

Nov. 30, 2013

Nov. 30, 2013

Nov. 30, 2013

Nov. 30, 2013

Nov. 30, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Jun. 30, 2014

Sep. 30, 2014

Bank of America [Member]

Bank of America [Member]

Bank of America [Member]

Bank of America [Member]

CTBC [Member]

CTBC [Member]

CTBC 2013 Facility [Member]

CTBC 2013 Facility [Member]

CTBC 2013 Facility [Member]

CTBC 2013 Facility [Member]

Line of Credit [Member]

Line of Credit [Member]

Line of Credit [Member]

Line of Credit [Member]

Line of Credit [Member]

Line of Credit [Member]

Line of Credit [Member]

Term Loan [Member]

Term Loan [Member]

Term Loan [Member]

Term Loan [Member]

Term Loan [Member]

Term Loan [Member]

Term Loan [Member]

Term Loan [Member]

Term Loan [Member]

Term Loan [Member]

Term Loan [Member]

Term Loan [Member]

Term Loan [Member]

Term Loan [Member]

Term Loan [Member]

Term Loan [Member]

Bank of America Credit Agreement [Member]

Bank of America Credit Agreement [Member]

Line of Credit [Member]

Line of Credit [Member]

Line of Credit [Member]

Maximum [Member]

Maximum [Member]

Minimum [Member]

Minimum [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

CTBC [Member]

CTBC [Member]

CTBC [Member]

CTBC [Member]

Bank of America [Member]

CTBC 2013 Facility [Member]

CTBC 2013 Facility [Member]

CTBC 2013 Facility [Member]

CTBC 2013 Facility [Member]

CTBC 2013 Facility [Member]

CTBC 2013 Facility [Member]

USD ($)

USD ($)

Bank of America [Member]

Bank of America [Member]

Bank of America [Member]

Bank of America [Member]

CTBC [Member]

CTBC [Member]

CTBC [Member]

CTBC 2013 Facility [Member]

CTBC 2013 Facility [Member]

CTBC 2013 Facility [Member]

CTBC 2013 Facility [Member]

CTBC 2013 Facility [Member]

CTBC 2013 Facility [Member]

CTBC 2013 Facility [Member]

Bank of America [Member]

Bank of America [Member]

Bank of America [Member]

Bank of America [Member]

Bank of America [Member]

USD ($)

TWD

USD ($)

TWD

USD ($)

TWD

Revolving Credit Facility [Member]

CTBC [Member]

CTBC [Member]

CTBC [Member]

CTBC [Member]

CTBC [Member]

CTBC [Member]

USD ($)

USD ($)

USD ($)

London Interbank Offered Rate (LIBOR) [Member]

USD ($)

TWD

CTBC [Member]

CTBC [Member]

CTBC [Member]

CTBC [Member]

CTBC [Member]

CTBC [Member]

CTBC [Member]

Consecutive_Quarters

Minimum [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

London Interbank Offered Rate (LIBOR) [Member]

USD ($)

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

CTBC's Established NTD Interest Rate [Member]

CTBC's Established USD Interest Rate [Member]

Building

USD ($)

USD ($)

Secured Debt [Member]

Secured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

CTBC's Established NTD Interest Rate [Member]

USD ($)

USD ($)

USD ($)

Revolving Credit Facility [Member]

USD ($)

TWD

USD ($)

USD ($)

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

USD ($)

TWD

USD ($)

TWD

Secured Debt [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit facility, maximum borrowing capacity

'

'

'

'

$9,898,000

300,000,000

'

'

$33,981,000

1,000,000,000

$40,000,000

$16,991,000

500,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$23,787,000

700,000,000

$3,398,000

100,000,000

'

'

'

'

'

'

Term loan, face amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

14,000,000

'

'

'

'

14,912,000

450,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Number of buildings as collateral

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit facility, basis spread on variable rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.25%

0.30%

'

'

'

'

'

1.50%

0.30%

'

'

'

'

'

'

'

'

0.25%

'

'

'

'

1.25%

Interest rate, period end

1.66%

1.65%

1.19%

1.19%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.16%

1.15%

'

'

'

'

'

'

'

'

'

'

Credit facility, unused amount

'

'

'

'

'

'

11,203,000

340,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

30,101,000

'

'

Credit facility, term

'

'

'

'

'

'

'

'

'

'

'

'13 months

'13 months

'

'

'

'

'

'

'5 years

'

'

'

'

'

'

'

'

'13 months

'13 months

'13 months

'13 months

'

'

'

'

'

'

Percent of eligible accounts receivable

'

'

'

'

'

'

'

'

'

'

'

80.00%

80.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt, total outstanding balance

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

'

'

27,580,000

28,588,000

'

5,833,000

6,533,000

'

'

'

'

21,747,000

22,055,000

'

'

'

'

'

'

'

'

'

'

Not to incur on a consolidated basis, a net loss before taxes and extraordinary items in any two consecutive quarterly accounting periods

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2

'

'

'

'

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

'

'

'

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

'

'

'

Amount of assets as collateral for credit facility

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$17,526,000

$17,584,000

'

'

'

'

$27,243,000

$27,345,000

'

'

'

'

'

'

'

$783,506,000

$751,396,000

'

RelatedParty_and_Other_Transac1

Related-Party and Other Transactions (Details) (USD $)

3 Months Ended

1 Months Ended

3 Months Ended

3 Months Ended

3 Months Ended

In Thousands, unless otherwise specified

Sep. 30, 2014

Sep. 30, 2013

Jun. 30, 2014

31-May-12

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Jun. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Super Micro Business Park, Inc. [Member]

Affiliated Entity [Member]

Affiliated Entity [Member]

Affiliated Entity [Member]

Affiliated Entity [Member]

Affiliated Entity [Member]

Affiliated Entity [Member]

Investee [Member]

Investee [Member]

Management and Immediate Family Member of Management [Member]

Co-venturer [Member]

Co-venturer [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Compuware [Member]

Ablecom [Member]

Ablecom [Member]

Ablecom [Member]

Ablecom [Member]

Ablecom [Member]

Super Micro [Member]

Ablecom [Member]

Ablecom [Member]

Ablecom [Member]

Ablecom [Member]

Ablecom [Member]

Minimum [Member]

Maximum [Member]

Ablecom [Member]

Charles Liang and His Wife [Member]

Steve Liang and Other Family Members [Member]

Selling, General and Administrative Expenses [Member]

Selling, General and Administrative Expenses [Member]

Related Party Transaction [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Investment ownership percentage by Ablecom

'

'

'

'

50.00%

'

'

'

'

'

1.00%

10.50%

35.90%

'

'

Purchases from Ablecom

'

'

'

'

'

$54,403

$45,317

'

'

'

'

'

'

'

'

Net sales to Ablecom

26,578

3,528

'

'

'

26,578

3,528

'

'

'

'

'

'

'

'

Amounts owed to the Company by Ablecom

2,416

'

621

'

'

2,416

'

621

'

'

'

'

'

'

'

Amounts owed to Ablecom by the Company

45,145

'

48,969

'

'

45,145

'

48,969

'

'

'

'

'

'

'

Majority of invoiced paid to Ablecom, number of days

'

'

'

'

'

'

'

'

'52 days

'66 days

'

'

'

'

'

Tooling assets and miscellaneous costs paid to Ablecom

'

'

'

'

'

2,002

2,276

'

'

'

'

'

'

'

'

Outstanding purchase order

226,532

'

211,090

'

'

70,455

'

64,464

'

'

'

'

'

'

'

Contribution in variable interest entity

'

'

'

168

'

'

'

'

'

'

'

'

'

'

'

Ownership percentage of Super Micro Business Park, Inc.

'

'

'

50.00%

'

'

'

'

'

'

'

'

'

'

'

Net income (loss) attributable to Ablecom's interest

'

'

'

'

'

'

'

'

'

'

'

'

'

$3

($6)

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'	'
Income tax provision	$10,602	$4,166
Effective tax rate	33.70%	35.10%
Unrecognized tax benefits that would impact effective tax rate, if recognized	11,608	'
Unrecognized tax benefits, income tax penalties and interest accrued	$960	'

Commitment_and_Contingencies_D

Commitment and Contingencies (Details) (USD $)	Sep. 30, 2014	Jun. 30, 2014
In Thousands, unless otherwise specified
Long-term And Short-term Purchase Commitment [Line Items]	'	'
Purchase commitments, total	$226,532	$211,090
Hard Disk Drive Commitment [Member]	'	'
Long-term And Short-term Purchase Commitment [Line Items]	'	'
Purchase commitments, hard disk drives	$29,224	'

Segment_Reporting_Segment_Repo

Segment Reporting - Segment Reporting of Net Sales by Geographic Region (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Net sales	$443,322	$309,016
UNITED STATES	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Net sales	243,378	175,214
Europe [Member]	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Net sales	89,557	71,185
Asia [Member]	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Net sales	88,438	54,972
Other region [Member]	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Net sales	$21,949	$7,645

Segment_Reporting_Segment_Repo1

Segment Reporting - Segment Reporting of Long-Lived Assets (Details) (USD $)	Sep. 30, 2014	Jun. 30, 2014
In Thousands, unless otherwise specified
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Long-lived assets	$133,067	$130,589
UNITED STATES	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Long-lived assets	95,792	94,119
Asia [Member]	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Long-lived assets	36,968	36,123
Europe [Member]	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Long-lived assets	$307	$347

Segment_Reporting_Segment_Repo2

Segment Reporting - Segment Reporting of Net Sales by Product Type (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting Information [Line Items]	'	'
Net sales	$443,322	$309,016
Net Sales [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Percent of net sales	100.00%	100.00%
Net Sales [Member] | Customer Concentration Risk [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Concentration, number of customers	0	0
Net Sales [Member] | Geographic Concentration Risk [Member] | International [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Concentration, International countries	0	0
Accounts Receivable [Member] | Credit Concentration Risk [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Concentration, number of customers	0	0
Server systems [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Net sales	255,609	143,283
Server systems [Member] | Net Sales [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Percent of net sales	57.70%	46.40%
Subsystems and accessories [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Net sales	$187,713	$165,733
Subsystems and accessories [Member] | Net Sales [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Percent of net sales	42.30%	53.60%