Super Micro Computer (SMCI) 10-Q 7 Feb 14 2014 Q2 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	6 Months Ended
	Dec. 31, 2013	Jan. 28, 2014
Document And Entity Information [Abstract]	'	'
Entity Registrant Name	'Super Micro Computer, Inc.	'
Entity Central Index Key	'0001375365	'
Current Fiscal Year End Date	'--06-30	'
Entity Filer Category	'Accelerated Filer	'
Document Type	'10-Q	'
Document Period End Date	31-Dec-13	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'
Amendment Flag	'false	'
Entity Common Stock, Shares Outstanding	'	43,720,499

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Dec. 31, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified
ASSETS	'	'
Cash and cash equivalents	$89,883	$93,038
Accounts receivable, net of allowances of $1,662 and $1,966 at December 31, 2013 and June 30, 2013, respectively (including amounts receivable from a related party of $417 and $974 at December 31, 2013 and June 30, 2013, respectively)	161,174	149,340
Inventory	290,927	254,170
Deferred income taxes-current	15,503	15,786
Prepaid income taxes	4,592	4,039
Prepaid expenses and other current assets	5,504	6,819
Total current assets	567,583	523,192
Long-term investments	2,637	2,637
Property, plant and equipment, net	128,072	95,912
Deferred income taxes-noncurrent	7,316	7,275
Other assets	3,123	3,241
Total assets	708,731	632,257
LIABILITIES AND STOCKHOLDERS' EQUITY	'	'
Accounts payable (including amounts due to a related party of $48,150 and $50,448 at December 31, 2013 and June 30, 2013, respectively)	205,758	172,855
Accrued liabilities	35,929	34,122
Income taxes payable	7,747	6,049
Short-term debt and current portion of long-term debt	37,208	28,638
Total current liabilities	286,642	241,664
Long-term debt-net of current portion	5,133	6,533
Other long-term liabilities	11,169	10,336
Total liabilities	302,944	258,533
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: 43,588,516 and 42,744,500 at December 31, 2013 and June 30, 2013, respectively	168,755	157,712
Treasury stock (at cost), 445,028 shares at December 31, 2013 and June 30, 2013	-2,030	-2,030
Accumulated other comprehensive loss	-70	-69
Retained earnings	238,964	217,930
Total Super Micro Computer, Inc. stockholders' equity	405,619	373,543
Noncontrolling interest	168	181
Total stockholders' equity	405,787	373,724
Total liabilities and stockholders' equity	$708,731	$632,257

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2013	Jun. 30, 2013
In Thousands, except Share data, unless otherwise specified
Current Assets	'	'
Accounts receivable, allowances	$1,662	$1,966
Accounts receivable, related party	417	974
Current Liabilities	'	'
Accounts payable, related party	$48,150	$50,448
Stockholders' Equity	'	'
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	43,588,516	42,744,500
Treasury stock, shares	445,028	445,028

Condensed_Consolidated_Stateme

Condensed Consolidated Statements Of Operations (Unaudited) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]	'	'	'	'
Net sales (including related party sales of $3,859 and $2,898 in the three months ended December 31, 2013 and 2012, respectively, and $7,387 and $5,791 in the six months ended December 31, 2013 and 2012, respectively)	$356,362	$291,487	$665,378	$562,194
Cost of sales (including related party purchases of $54,424 and $38,683 in the three months ended December 31, 2013 and 2012, respectively, and $99,741 and $87,940 in the six months ended December 31, 2013 and 2012, respectively)	301,270	251,365	563,494	487,057
Gross profit	55,092	40,122	101,884	75,137
Operating expenses:	'	'	'	'
Research and development	20,428	18,824	40,664	37,045
Sales and marketing	8,976	7,945	17,841	16,711
General and administrative	5,484	5,745	11,132	12,091
Total operating expenses	34,888	32,514	69,637	65,847
Income from operations	20,204	7,608	32,247	9,290
Interest and other income, net	46	7	63	22
Interest expense	-184	-152	-379	-307
Income before income tax provision	20,066	7,463	31,931	9,005
Income tax provision	6,731	2,549	10,897	3,192
Net income	$13,335	$4,914	$21,034	$5,813
Net income per common share:	'	'	'	'
Basic (Per Share)	$0.31	$0.12	$0.49	$0.14
Diluted (Per Share)	$0.30	$0.11	$0.47	$0.13
Weighted-average shares used in calculation of net income per common share:	'	'	'	'
Basic (Shares)	42,915	41,893	42,706	41,780
Diluted (Shares)	45,039	43,431	45,052	43,819

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements Of Operations (Parenthetical) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]	'	'	'	'
Net sales, related party sales	$3,859	$2,898	$7,387	$5,791
Cost of sales, related party purchases	$54,424	$38,683	$99,741	$87,940

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net income	$13,335	$4,914	$21,034	$5,813
Other comprehensive income, net of tax:	'	'	'	'
Foreign currency translation gain (loss)	-5	4	-1	8
Unrealized gains on investments	0	16	0	16
Total other comprehensive income (loss)	-5	20	-1	24
Comprehensive income	$13,330	$4,934	$21,033	$5,837

Condensed_Consolidated_Stateme3

Condensed Consolidated Statements Of Cash Flows (Unaudited) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
OPERATING ACTIVITIES:	'	'
Net income	$21,034	$5,813
Reconciliation of net income to net cash provided by operating activities:	'	'
Depreciation and amortization	2,920	3,974
Stock-based compensation expense	5,377	5,812
Excess tax benefits from stock-based compensation	-1,084	-785
Allowance for doubtful accounts	1,076	75
Provision for inventory	1,538	6,313
Deferred income taxes	242	-3,982
Exchange loss (gain)	-115	278
Changes in operating assets and liabilities:	'	'
Accounts receivable, net (including changes in related party balances of $557 and $418 during the six months ended December 31, 2013 and 2012, respectively)	-12,910	-16,973
Inventory	-38,295	26,689
Prepaid expenses and other assets	1,428	699
Accounts payable (including changes in related party balances of $(2,298) and $(14,267) during the six months ended December 31, 2013 and 2012, respectively)	31,950	-25,094
Income taxes payable, net	2,677	679
Accrued liabilities	1,760	2,203
Other long-term liabilities	797	-98
Net cash provided by operating activities	18,395	5,603
INVESTING ACTIVITIES:	'	'
Restricted cash	-8	-12
Proceeds from investments	0	300
Purchases of property, plant and equipment	-33,956	-2,790
Net cash used in investing activities	-33,964	-2,502
FINANCING ACTIVITIES:	'	'
Proceeds from exercise of stock options	4,785	780
Minimum tax withholding paid on behalf of an officer for restricted stock awards	-651	-1,022
Excess tax benefits from stock-based compensation	1,084	785
Proceeds from debt	8,576	20,641
Repayment of debt	-1,400	-16,673
Payment of obligations under capital leases	-15	-18
Advances (payments) under receivable financing arrangements	41	-584
Contributions from noncontrolling interests	0	168
Net cash provided by financing activities	12,420	4,077
Effect of exchange rate fluctuations on cash	-6	394
Net increase (decrease) in cash and cash equivalents	-3,155	7,572
Cash and cash equivalents at beginning of period	93,038	80,826
Cash and cash equivalents at end of period	89,883	88,398
Supplemental disclosure of cash flow information:	'	'
Cash paid for interest	378	409
Cash paid for taxes, net of refunds	6,840	6,448
Non-cash investing and financing activities:	'	'
Accrued costs for property, plant and equipment purchases	$2,891	$1,080

Condensed_Consolidated_Stateme4

Condensed Consolidated Statements Of Cash Flows (Parenthetical) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Net cash provided by (used in) operating activities	'	'
Accounts receivable, changes in related party balances	$557	$418
Accounts payable, changes in related party balances	($2,298)	($14,267)

Summary_of_Significant_Account

Summary of Significant Accounting Policies	6 Months Ended
	Dec. 31, 2013
Accounting Policies [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 and China.
	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, 2013 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 and six months ended December 31, 2013 are not necessarily indicative of the results that may be expected for future quarters or for the fiscal year ending June 30, 2014.
	As of December 31, 2013, the Company contributed $168,000 and owned a 50% interest in Super Micro Business Park, Inc. ("Management Company") in Taiwan. The Management Company was established to manage the common areas shared by the Company and Ablecom for their separately constructed manufacturing facilities. 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. Therefore, the accounts of the Management Company have been consolidated with the accounts of the Company, and a noncontrolling interest has been recorded for Ablecom's interests in the net assets and operations of the Management Company. In the three and six months ended December 31, 2013, $7,000 and $13,000, respectively, of net loss attributable to Ablecom's interest was included in the Company's general and administrative expenses in the condensed consolidated statements of operations. In the three and six months ended December 31, 2012, $2,000 and $0, respectively, of net income attributable to Ablecom's interest was included in the Company's general and administrative expenses in the condensed consolidated statements of operations.
	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 February 2013, the Financial Accounting Standards Board ("FASB") issued authoritative guidance associated with reporting of amounts reclassified out of accumulated other comprehensive income, which requires companies to present significant reclassifications out of accumulated other comprehensive income in their entirety in the statement of operations or in a separate footnote to the financial statements. For amounts that are not required to be reclassified in their entirety to net income, the standard requires companies to cross-reference to related footnoted disclosures. The new disclosure requirements are effective on a prospective basis for financial statements issued for fiscal years, and interim periods within those years, beginning after December 15, 2012 and early adoption is permitted. The adoption of this guidance did not have a material impact on the Company's financial statement disclosures, results of operations or financial position.
	In July 2013, the FASB issued authoritative guidance associated with the presentation of 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 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 Company currently plans to adopt the new disclosure requirement on July 1, 2014. The Company does not believe the adoption of this guidance will have a material impact on its financial statement disclosures, results of operations or financial position.

StockBased_Compensation_and_St

Stock-Based Compensation and Stockholders' Equity	6 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock-based Compensation and Stockholders' Equity	'
	Stock-based Compensation and Stockholders’ Equity
	Equity Incentive Plan
	In January 2011, the Board of Directors approved an amendment to the 2006 Equity Incentive Plan (the “2006 Plan”) that increased by 2,000,000 the aggregate maximum number of shares that may be issued under the 2006 Plan. The amendment to the 2006 Plan was approved by the Company’s stockholders in February 2011. The authorized number of shares that may be issued under 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. As of December 31, 2013, the Company had 1,115,296 authorized shares available for future issuance under all of its equity incentive plans.
	Restricted Stock Awards
	Restricted stock awards are share awards that provide the rights to a set number of shares of the Company’s stock on the grant date. In August 2008, the Compensation Committee of the Board of Directors of the Company (the “Committee”) approved the terms of an agreement (the “Option Exercise Agreement”) with Charles Liang, a director and President and Chief Executive Officer of the Company, pursuant to which Mr. Liang exercised a fully vested option previously granted to him for the purchase of 925,000 shares. The option was exercised using a “net-exercise” procedure in which he was issued a number of shares representing the spread between the option exercise price and the then current market value of the shares subject to the option (898,205 shares based upon the market value as of the date of exercise). The shares issued upon exercise of the option are subject to vesting over five years. Vesting of the shares subject to the award may accelerate in certain circumstances pursuant to the terms of the Option Exercise Agreement. The Company determined that there was no incremental fair value of the option exchanged for the award. 898,205 and 718,564 shares were vested as of December 31, 2013 and June 30, 2013, respectively.
	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 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 and six months ended December 31, 2013 and 2012 was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions:
		Three Months Ended							Six Months Ended
		December 31,							December 31,
		2013				2012			2013				2012
	Risk-free interest rate	1.53		%		0.81		%	1.53% - 1.54%				0.65% - 0.81%
	Expected life	5.50 years				5.11 years			5.49 - 5.50 years				5.03 - 5.11 years
	Dividend yield	—		%		—		%	—		%		—		%
	Volatility	50.07		%		51.57		%	50.05% - 50.07%				51.29% - 51.57%
	Weighted-average fair value	$	6.63			$	4.17		$	6.24			$	4.91
	The following table shows total stock-based compensation expense included in the condensed consolidated statements of operations for the three and six months ended December 31, 2013 and 2012 (in thousands):
		Three Months Ended							Six Months Ended
		December 31,							December 31,
		2013				2012			2013				2012
	Cost of sales	$	245			$	224		$	480			$	464
	Research and development	1,709				1,632			3,270				3,262
	Sales and marketing	305				389			619				793
	General and administrative	529				664			1,008				1,293
	Stock-based compensation expense before taxes	2,788				2,909			5,377				5,812
	Income tax impact	(381		)		(181		)	(669		)		(409		)
	Stock-based compensation expense, net	$	2,407			$	2,728		$	4,708			$	5,403
	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 $1,532,000 and $1,494,000 of excess tax benefits accounted in the Company’s additional paid-in capital in the six months ended December 31, 2013 and 2012, respectively. The Company had excess tax benefits that are classified as cash from financing activities of $1,084,000 and $785,000 in the six months ended December 31, 2013 and 2012, 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 six months ended December 31, 2013 under all stock option plans:
			Number of Shares			Weighted			Weighted		Aggregate
						Average			Average		Intrinsic
						Exercise			Remaining		Value
						Price per			Contractual		(in thousands)
						Share			Term
									(in Years)
	Outstanding at July 1, 2013		12,206,178			$	10.83		6.23		$	22,631
	Granted		945,620			13.4
	Exercised		(714,375	)		6.7
	Forfeited or cancelled		(155,947	)		13.94
	Outstanding at December 31, 2013		12,281,476			11.23			6.12		74,943
	Options vested and expected to vest at December 31, 2013		12,009,051			11.19			6.05		73,834
	Options vested and exercisable at December 31, 2013		8,880,986			$	10.28		5.14		$	62,395
	The total pretax intrinsic value of options exercised was $3,234,000 and $5,215,000 for the three and six months ended December 31, 2013, respectively, and $2,190,000 and $3,068,000 for the three and six months ended December 31, 2012, respectively. As of December 31, 2013, 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 $18,757,000, which will be recognized over a weighted-average vesting period of approximately 2.39 years.
	Restricted Stock Award Activity
	The following table summarizes the Company’s restricted stock award activity for the six months ended December 31, 2013:
		Restricted Stock Awards
		Number			Weighted
		of Shares			Average
					Grant Date
					Fair Value
					Per Share
	Nonvested stock at July 1, 2013	179,641			$	10.66
	Granted	3,500			14.23
	Vested	(179,641	)		10.66
	Forfeited	—			—
	Nonvested stock at December 31, 2013	3,500			$	14.23
	The total pretax intrinsic value of restricted stock awards vested was $0 and $2,337,000 for the three and six months ended December 31, 2013, respectively, and $0 and $2,190,000 for the three and six months ended December 31, 2012, respectively. In the six months ended December 31, 2013 and 2012, upon vesting, 179,641 shares of restricted stock awards were partially net share-settled such that the Company withheld 50,000 and 83,857 shares, respectively, 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 were based on the value of the restricted stock awards on the vesting date as determined by the Company’s closing stock price. Total payments for an officer's tax obligations to the taxing authorities were $651,000 and $1,022,000 in the six months ended December 31, 2013 and 2012, respectively, and are reflected as a financing activity within the condensed consolidated statements of cash flows. These net-share settlements had the effect of share repurchases by the Company as they reduced and retired the number of shares that would have otherwise been issued as a result of the vesting and did not represent an expense to the Company. The total intrinsic value of the outstanding restricted stock awards was $60,000 as of December 31, 2013.

Net_Income_Per_Common_Share

Net Income Per Common Share	6 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Net Income Per Common Share	'
	Net Income Per Common Share
	The computation of basic and diluted net income per common share using the two-class method is as follows (in thousands, except per share amounts):
		Three Months Ended						Six Months Ended
		December 31,						December 31,
		2013			2012			2013			2012
	Basic net income per common share calculation
	Net income	$	13,335		$	4,914		$	21,034		$	5,813
	Less: Undistributed earnings allocated to participating securities	(1		)	(21		)	(28		)	(33		)
	Net income attributable to common shares—basic	$	13,334		$	4,893		$	21,006		$	5,780
	Weighted-average number of common shares used to compute basic net income per common share	42,915			41,893			42,706			41,780
	Basic net income per common share	$	0.31		$	0.12		$	0.49		$	0.14
	Diluted net income per common share calculation
	Net income	$	13,335		$	4,914		$	21,034		$	5,813
	Less: Undistributed earnings allocated to participating securities	(1		)	(21		)	(26		)	(31		)
	Net income attributable to common shares—diluted	$	13,334		$	4,893		$	21,008		$	5,782
	Weighted-average number of common shares used to compute basic net income per common share	42,915			41,893			42,706			41,780
	Dilutive effect of options to purchase common stock	2,124			1,538			2,346			2,039
	Weighted-average number of common shares used to compute diluted net income per common share	45,039			43,431			45,052			43,819
	Diluted net income per common share	$	0.3		$	0.11		$	0.47		$	0.13
	For the three and six months ended December 31, 2013 and 2012, 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 6,288,000 and 5,461,000 for the three and six months ended December 31, 2013, respectively, and 7,293,000 and 5,842,000 for the three and six months ended December 31, 2012, respectively.

Balance_Sheet_Components

Balance Sheet Components	6 Months Ended
	Dec. 31, 2013
Balance Sheet Related Disclosures [Abstract]	'
Balance Sheet Components	'
	Balance Sheet Components (in thousands)
	The following tables provide details of the selected balance sheet items (in thousands):
	Inventory:
		December 31,			June 30,
		2013			2013
	Finished goods	$	215,857		$	185,459
	Work in process	22,856			10,440
	Purchased parts and raw materials	52,214			58,271
	Total inventory	$	290,927		$	254,170
	The Company recorded a provision for lower of costs or market and excess and obsolete inventory totaling $1,534,000 and $1,538,000 in the three and six months ended December 31, 2013, respectively, and $3,403,000 and $6,313,000 in the three and six months ended December 31, 2012, respectively.
	Property, Plant, and Equipment:
		December 31,			June 30,
		2013			2013
	Land	$	63,952		$	41,774
	Buildings	51,959			43,979
	Building and leasehold improvements	7,547			7,483
	Machinery and equipment	31,315			26,941
	Furniture and fixtures	4,852			4,731
	Purchased software	5,507			5,380
		165,132			130,288
	Accumulated depreciation and amortization	(37,060		)	(34,376		)
	Property, plant and equipment, net	$	128,072		$	95,912
	On October 31, 2013, the Company completed the purchase of real property for $30,158,000. The property consists of approximately 324,000 square feet of building space on 36 acres of land. The purchase values allocated to the land and building were $22,178,000 and $7,980,000, respectively.
	Other Assets:
		December 31,			June 30,
		2013			2013
	Prepaid royalty license	$	1,371		$	1,496
	Restricted cash	855			847
	Investment in a privately held company	750			750
	Others	147			148
	Total other assets	$	3,123		$	3,241
	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, certificates of deposits pledged as security for value added tax examination required by tax authority of Taiwan and bank guarantees in connection with office leases in the Netherlands.
	Accrued Liabilities:
		December 31,			June 30,
		2013			2013
	Accrued payroll and related expenses	$	12,834		$	12,084
	Customer prepayments	4,614			4,134
	Accrued warranty costs	6,822			6,472
	Accrued cooperative marketing expenses	3,952			4,016
	Others	7,707			7,416
	Total accrued liabilities	$	35,929		$	34,122
	Product Warranties:
		Three Months Ended						Six Months Ended
		December 31,						December 31,
		2013			2012			2013			2012
	Balance, beginning of period	$	6,600		$	5,964		$	6,472		$	5,522
	Provision for warranty	3,507			3,384			6,941			6,492
	Costs charged to accrual	(3,313		)	(3,153		)	(6,664		)	(6,057		)
	Change in estimated liability for pre-existing warranties	28			32			73			270
	Balance, end of period	$	6,822		$	6,227		$	6,822		$	6,227

LongTerm_Investments

Long-Term Investments	6 Months Ended
	Dec. 31, 2013
Long-term Investments [Abstract]	'
Long-term Investments	'
	Long-term Investments
	As of December 31, 2013 and June 30, 2013, the Company held $2,637,000 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 December 31, 2013 and June 30, 2013. 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 saleable in the auction, thereby losing the short-term liquidity previously provided by the auction process. As a result, as of December 31, 2013 and June 30, 2013, $2,637,000 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 December 31, 2013 and June 30, 2013. 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 December 31, 2013, the discount rate, the time period until redemption and the estimated rate of return were 1.51%, 3 years and 0.26%, 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 and six months ended December 31, 2013. There was a recovery in fair value of $27,000 during the three and six months ended December 31, 2012. There was a cumulative total decline in fair value of $113,000 as of December 31, 2013 and June 30, 2013. That amount has been recorded as a component of other comprehensive income. As of December 31, 2013 and June 30, 2013, the Company has recorded an accumulated unrealized loss of $68,000, 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. During the three and six months ended December 31, 2013, there were no auction rate securities redeemed or sold. During the three and six months ended December 31, 2012, $300,000 of the auction rate securities were redeemed at par.

Fair_Value_Disclosure

Fair Value Disclosure	6 Months Ended
	Dec. 31, 2013
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 December 31, 2013 and June 30, 2013. Refer to Note 1 of Notes to Condensed Consolidated Financial Statements 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 of Notes to Condensed Consolidated Financial Statements.
	The following table sets forth the Company’s cash equivalents and long-term investments as of December 31, 2013 and June 30, 2013 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):
	December 31, 2013	Level 1		Level 2			Level 3			Asset at
										Fair Value
	Money market funds	$	310	$	—		$	—		$	310
	Auction rate securities	—		—			2,637			2,637
	Total	$	310	$	—		$	2,637		$	2,947
	June 30, 2013	Level 1		Level 2			Level 3			Asset at
										Fair Value
	Money market funds	$	310	$	—		$	—		$	310
	Auction rate securities	—		—			2,637			2,637
	Total	$	310	$	—		$	2,637		$	2,947
	The above table excludes $89,337,000 and $92,495,000 of cash and $1,150,000 and $1,139,000 of certificates of deposit held by the Company as of December 31, 2013 and June 30, 2013, respectively. There were no transfers between Level 1, Level 2 or Level 3 securities in the three and six months ended December 31, 2013 and 2012.
	The following table provides a reconciliation of the Company’s financial assets measured at fair value on a recurring basis, consisting of long-term auction rate securities, using significant unobservable inputs (Level 3) for the three and six months ended December 31, 2013 and 2012 (in thousands):
		Three Months Ended					Six Months Ended
		December 31,					December 31,
		2013		2012			2013			2012
	Balance as of beginning of period	$	2,637	$	2,923		$	2,637		$	2,923
	Total realized gains or (losses) included in net income	—		—			—			—
	Total unrealized gains or (losses) included in other comprehensive income	—		27			—			27
	Sales and settlements at par	—		(300		)	—			(300		)
	Transfers in and/or out of Level 3	—		—			—			—
	Balance as of end of period	$	2,637	$	2,650		$	2,637		$	2,650
	The following is a summary of the Company’s long-term investments as of December 31, 2013 and June 30, 2013 (in thousands):
		December 31, 2013
		Amortized		Gross			Gross			Fair Value
		Cost		Unrealized			Unrealized
				Holding			Holding
				Gains			Losses
	Auction rate securities	$	2,750	$	—		$	(113	)	$	2,637
		June 30, 2013
		Amortized		Gross			Gross			Fair Value
		Cost		Unrealized			Unrealized
				Holding			Holding
				Gains			Losses
	Auction rate securities	$	2,750	$	—		$	(113	)	$	2,637
	The Company measures the fair value of outstanding debt for disclosure purposes on a recurring basis. As of December 31, 2013 and June 30, 2013, short-term and long-term debt of $42,341,000 and $35,171,000, respectively, are reported at amortized cost. This outstanding debt is classified at 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	6 Months Ended
	Dec. 31, 2013
Debt Instruments [Abstract]	'
Short-term and Long-term Obligations	'
	Short-term and Long-term Obligations
	Short-term and long-term obligations as of December 31, 2013 and June 30, 2013 consisted of the following (in thousands):
		December 31,			June 30,
		2013			2013
	Lines of credit:
	Bank of America	$	10,899		$	10,899
	CTBC Bank	3,520			—
	Total line of credit	14,419			10,899
	Building term loans:
	Bank of America	7,933			9,333
	CTBC Bank	19,989			14,939
	Total building term loans	27,922			24,272
	Total debt	42,341			35,171
	Current portion	(37,208		)	(28,638		)
	Long-term portion	$	5,133		$	6,533
	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 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 August 15, 2014.
	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 0.17% at December 31, 2013. For borrowings denominated in Taiwanese dollars, the interest rate is equal to the lender's established interest rate which is adjusted monthly.
	As of December 31, 2013 and June 30, 2013, the total outstanding borrowings under the Bank of America term loan was $7,933,000 and $9,333,000, respectively. The total outstanding borrowings under the Bank of America line of credit was $10,899,000 as of December 31, 2013 and June 30, 2013, respectively. The interest rates for these loans ranged from 1.20% to 1.67% per annum at December 31, 2013 and 1.23% to 1.69% per annum at June 30, 2013, respectively. As of December 31, 2013, the unused revolving line of credit with Bank of America was $29,101,000.
	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. dollar equivalents. In July 2012, the Company increased the credit facility to NT$450,000,000 Taiwanese dollars or $14,912,000 U.S. dollar 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 was 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 Taiwanese dollars 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 New Taiwan Dollar ("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 Taiwanese dollars 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 Taiwanese dollars 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 Taiwanese dollars 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 $19,989,000 and $14,939,000 at December 31, 2013 and June 30, 2013, respectively. The total outstanding borrowings under the CTBC Bank revolving line of credit was $3,520,000 and $0 at December 31, 2013 and June 30, 2013, respectively. The interest rates for these loans ranged from 1.11% to 1.74% per annum at December 31, 2013 and was at 1.20% per annum at June 30, 2013. At December 31, 2013, NT$294,340,000 Taiwanese dollars or $9,806,000 U.S. dollar equivalents were available for future borrowing under this 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 December 31, 2013 and June 30, 2013, total assets of $663,476,000 and $586,742,000, respectively collateralized the line of credit with Bank of America and were all of the assets of the Company except for the three buildings located in San Jose, California and the land and building located in Bade, Taiwan. As of December 31, 2013 and June 30, 2013, total assets collateralizing the term loan with Bank of America were $17,699,000 and $17,813,000, respectively. As of December 31, 2013, the Company was in compliance with all financial covenants associated with the credit agreement with Bank of America.
	As of December 31, 2013 and June 30, 2013, the net book value of land and building located in Bade, Taiwan collateralizing the term loan with CTBC Bank was $27,556,000 and $27,702,000, respectively. There are no financial covenants associated with the term loan with CTBC Bank at December 31, 2013.

RelatedParty_and_Other_Transac

Related-Party and Other Transactions	6 Months Ended
	Dec. 31, 2013
Related Party Transaction, Due from (to) Related Party [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 1.1% 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 December 31, 2013.
	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 $54,424,000 and $99,741,000 and sold products to Ablecom totaling $3,859,000 and $7,387,000 for the three and six months ended December 31, 2013, respectively. The Company purchased products from Ablecom totaling $38,683,000 and $87,940,000 and sold products to Ablecom totaling $2,898,000 and $5,791,000 for the three and six months ended December 31, 2012, respectively.
	Amounts owed to the Company by Ablecom as of December 31, 2013 and June 30, 2013, were $417,000 and $974,000, respectively. Amounts owed to Ablecom by the Company as of December 31, 2013 and June 30, 2013, were $48,150,000 and $50,448,000, respectively. For the three and six months ended December 31, 2013, the Company paid Ablecom the majority of invoiced dollars between 55 and 93 days of invoice. For the three and six months ended December 31, 2013, the Company paid $1,460,000 and $3,736,000, respectively, for tooling assets and miscellaneous costs to Ablecom. For the three and six months ended December 31, 2012, the Company paid $1,483,000 and $2,867,000, 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 $63,352,000 and $53,684,000 at December 31, 2013 and June 30, 2013, 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 and six months ended December 31, 2013, $7,000 and $13,000, respectively, of net loss attributable to Ablecom's interest was included in the Company's general and administrative expenses in the condensed consolidated statements of operations. In the three and six months ended December 31, 2012, $2,000 and $0, respectively, of net income attributable to Ablecom's interest was included in the Company's general and administrative expenses in the condensed consolidated statements of operations.

Income_Taxes

Income Taxes	6 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	The Company recorded provisions for income taxes of $6,731,000 and $10,897,000 for the three and six months ended December 31, 2013, respectively, and $2,549,000 and $3,192,000 for the three and six months ended December 31, 2012. The effective tax rate was 33.5% and 34.1% for the three and six months ended December 31, 2013, respectively, and 34.2% and 35.4% for the three and six months ended December 31, 2012, respectively. The effective tax rates for the three and six months ended December 31, 2013 are estimated to be lower than the federal statutory rate primarily due to the Company's release of unrecognized tax benefit as a result of audit settlements in the U.S. and foreign jurisdictions and the benefit from U.S. federal and state research and development tax credits in part offset by an increase in stock option expenses.
	As of December 31, 2013, the Company had a liability for gross unrecognized tax benefits of $9,194,000, substantially all of which, if recognized, would affect the Company's effective tax rate. During the three and six months ended December 31, 2013, 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 December 31, 2013, the Company had accrued $851,000 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 2010 through 2013. The state jurisdictions remain open in general for tax years 2008 through 2013. The Company's tax returns for its most significant foreign jurisdictions remain open for examination in general for tax years 2006 through 2013. The Company does not expect its unrecognized tax benefits to change materially over the next 12 months.

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Dec. 31, 2013
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 condensed 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 December 31, 2013, these remaining non-cancellable commitments were $257,728,000.
	Included in the above non-cancellable commitments are hard disk drive purchase commitments totaling approximately $89,819,000, 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	6 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]	'
Segment Reporting	'
	Segment Reporting
	The Company operates in one operating segment that develops and provides high performance server solutions based upon an innovative, modular and open-standard architecture. The Company’s chief operating decision maker is the Chief Executive Officer.
	International net sales are based on the country and region to which the products were shipped. The following is a summary for the three and six months ended December 31, 2013 and 2012, of net sales by geographic region (in thousands):
		Three Months Ended					Six Months Ended
		December 31,					December 31,
		2013		2012			2013			2012
	Net sales:
	United States	$	179,571	$	156,533		$	354,785		$	291,359
	Europe	84,977		66,874			156,162			130,323
	Asia	82,211		60,413			137,183			125,097
	Other	9,603		7,667			17,248			15,415
		$	356,362	$	291,487		$	665,378		$	562,194
	The following is a summary of long-lived assets, excluding financial instruments, deferred tax assets and other assets (in thousands):
		December 31,		June 30,
		2013		2013
	Long-lived assets:
	United States	$	91,497	$	61,976
	Asia	36,193		33,500
	Europe	382		436
		$	128,072	$	95,912
	The following is a summary of net sales by product type (in thousands):
		Three Months Ended										Six Months Ended
		December 31,										December 31,
		2013				2012						2013				2012
		Amount		Percent of		Amount			Percent of			Amount		Percent of		Amount		Percent of
				Net Sales					Net Sales					Net Sales				Net Sales
	Server systems	$	174,072	48.8	%	$	126,117		43.3	%		$	317,355	47.7	%	$	232,966	41.4	%
	Subsystems and accessories	182,290		51.2	%	165,370			56.7	%		348,023		52.3	%	329,228		58.6	%
	Total	$	356,362	100	%	$	291,487		100	%		$	665,378	100	%	$	562,194	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 and six months ended December 31, 2013 and 2012. No customer accounted for 10% or more of accounts receivable as of December 31, 2013. One customer accounted for 14.4% of the Company's accounts receivable as of June 30, 2013.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Organization	'
	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 and China.
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, 2013 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 and six months ended December 31, 2013 are not necessarily indicative of the results that may be expected for future quarters or for the fiscal year ending June 30, 2014.
	As of December 31, 2013, the Company contributed $168,000 and owned a 50% interest in Super Micro Business Park, Inc. ("Management Company") in Taiwan. The Management Company was established to manage the common areas shared by the Company and Ablecom for their separately constructed manufacturing facilities. 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. Therefore, the accounts of the Management Company have been consolidated with the accounts of the Company, and a noncontrolling interest has been recorded for Ablecom's interests in the net assets and operations of the Management Company. In the three and six months ended December 31, 2013, $7,000 and $13,000, respectively, of net loss attributable to Ablecom's interest was included in the Company's general and administrative expenses in the condensed consolidated statements of operations
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 February 2013, the Financial Accounting Standards Board ("FASB") issued authoritative guidance associated with reporting of amounts reclassified out of accumulated other comprehensive income, which requires companies to present significant reclassifications out of accumulated other comprehensive income in their entirety in the statement of operations or in a separate footnote to the financial statements. For amounts that are not required to be reclassified in their entirety to net income, the standard requires companies to cross-reference to related footnoted disclosures. The new disclosure requirements are effective on a prospective basis for financial statements issued for fiscal years, and interim periods within those years, beginning after December 15, 2012 and early adoption is permitted. The adoption of this guidance did not have a material impact on the Company's financial statement disclosures, results of operations or financial position.
	In July 2013, the FASB issued authoritative guidance associated with the presentation of 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 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 Company currently plans to adopt the new disclosure requirement on July 1, 2014. The Company does not believe the adoption of this guidance will have a material impact on its financial statement disclosures, results of operations or financial position.

StockBased_Compensation_and_St1

Stock-Based Compensation and Stockholders' Equity (Tables)	6 Months Ended
	Dec. 31, 2013
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 and six months ended December 31, 2013 and 2012 was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions:
		Three Months Ended							Six Months Ended
		December 31,							December 31,
		2013				2012			2013				2012
	Risk-free interest rate	1.53		%		0.81		%	1.53% - 1.54%				0.65% - 0.81%
	Expected life	5.50 years				5.11 years			5.49 - 5.50 years				5.03 - 5.11 years
	Dividend yield	—		%		—		%	—		%		—		%
	Volatility	50.07		%		51.57		%	50.05% - 50.07%				51.29% - 51.57%
	Weighted-average fair value	$	6.63			$	4.17		$	6.24			$	4.91
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs	'
	The following table shows total stock-based compensation expense included in the condensed consolidated statements of operations for the three and six months ended December 31, 2013 and 2012 (in thousands):
		Three Months Ended							Six Months Ended
		December 31,							December 31,
		2013				2012			2013				2012
	Cost of sales	$	245			$	224		$	480			$	464
	Research and development	1,709				1,632			3,270				3,262
	Sales and marketing	305				389			619				793
	General and administrative	529				664			1,008				1,293
	Stock-based compensation expense before taxes	2,788				2,909			5,377				5,812
	Income tax impact	(381		)		(181		)	(669		)		(409		)
	Stock-based compensation expense, net	$	2,407			$	2,728		$	4,708			$	5,403
Schedule of Share-based Compensation, Stock Options Activity	'
	The following table summarizes stock option activity during the six months ended December 31, 2013 under all stock option plans:
			Number of Shares			Weighted			Weighted		Aggregate
						Average			Average		Intrinsic
						Exercise			Remaining		Value
						Price per			Contractual		(in thousands)
						Share			Term
									(in Years)
	Outstanding at July 1, 2013		12,206,178			$	10.83		6.23		$	22,631
	Granted		945,620			13.4
	Exercised		(714,375	)		6.7
	Forfeited or cancelled		(155,947	)		13.94
	Outstanding at December 31, 2013		12,281,476			11.23			6.12		74,943
	Options vested and expected to vest at December 31, 2013		12,009,051			11.19			6.05		73,834
	Options vested and exercisable at December 31, 2013		8,880,986			$	10.28		5.14		$	62,395
Schedule of Share-based Compensation, Restricted Stock Award Activity	'
	The following table summarizes the Company’s restricted stock award activity for the six months ended December 31, 2013:
		Restricted Stock Awards
		Number			Weighted
		of Shares			Average
					Grant Date
					Fair Value
					Per Share
	Nonvested stock at July 1, 2013	179,641			$	10.66
	Granted	3,500			14.23
	Vested	(179,641	)		10.66
	Forfeited	—			—
	Nonvested stock at December 31, 2013	3,500			$	14.23

Net_Income_per_Common_Share_Ta

Net Income per Common Share (Tables)	6 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Computation of Basic and Diluted Net Income Per Common Share Using Two-class Method	'
	The computation of basic and diluted net income per common share using the two-class method is as follows (in thousands, except per share amounts):
		Three Months Ended						Six Months Ended
		December 31,						December 31,
		2013			2012			2013			2012
	Basic net income per common share calculation
	Net income	$	13,335		$	4,914		$	21,034		$	5,813
	Less: Undistributed earnings allocated to participating securities	(1		)	(21		)	(28		)	(33		)
	Net income attributable to common shares—basic	$	13,334		$	4,893		$	21,006		$	5,780
	Weighted-average number of common shares used to compute basic net income per common share	42,915			41,893			42,706			41,780
	Basic net income per common share	$	0.31		$	0.12		$	0.49		$	0.14
	Diluted net income per common share calculation
	Net income	$	13,335		$	4,914		$	21,034		$	5,813
	Less: Undistributed earnings allocated to participating securities	(1		)	(21		)	(26		)	(31		)
	Net income attributable to common shares—diluted	$	13,334		$	4,893		$	21,008		$	5,782
	Weighted-average number of common shares used to compute basic net income per common share	42,915			41,893			42,706			41,780
	Dilutive effect of options to purchase common stock	2,124			1,538			2,346			2,039
	Weighted-average number of common shares used to compute diluted net income per common share	45,039			43,431			45,052			43,819
	Diluted net income per common share	$	0.3		$	0.11		$	0.47		$	0.13

Balance_Sheet_Components_Table

Balance Sheet Components (Tables)	6 Months Ended
	Dec. 31, 2013
Balance Sheet Related Disclosures [Abstract]	'
Inventory	'
	Inventory:
		December 31,			June 30,
		2013			2013
	Finished goods	$	215,857		$	185,459
	Work in process	22,856			10,440
	Purchased parts and raw materials	52,214			58,271
	Total inventory	$	290,927		$	254,170
Property, Plant and Equipment	'
	Property, Plant, and Equipment:
		December 31,			June 30,
		2013			2013
	Land	$	63,952		$	41,774
	Buildings	51,959			43,979
	Building and leasehold improvements	7,547			7,483
	Machinery and equipment	31,315			26,941
	Furniture and fixtures	4,852			4,731
	Purchased software	5,507			5,380
		165,132			130,288
	Accumulated depreciation and amortization	(37,060		)	(34,376		)
	Property, plant and equipment, net	$	128,072		$	95,912
Other Assets	'
	Other Assets:
		December 31,			June 30,
		2013			2013
	Prepaid royalty license	$	1,371		$	1,496
	Restricted cash	855			847
	Investment in a privately held company	750			750
	Others	147			148
	Total other assets	$	3,123		$	3,241
Accrued Liabilities	'
	Accrued Liabilities:
		December 31,			June 30,
		2013			2013
	Accrued payroll and related expenses	$	12,834		$	12,084
	Customer prepayments	4,614			4,134
	Accrued warranty costs	6,822			6,472
	Accrued cooperative marketing expenses	3,952			4,016
	Others	7,707			7,416
	Total accrued liabilities	$	35,929		$	34,122
Reconciliation of the Changes in Accrued Warranty Costs	'
	Product Warranties:
		Three Months Ended						Six Months Ended
		December 31,						December 31,
		2013			2012			2013			2012
	Balance, beginning of period	$	6,600		$	5,964		$	6,472		$	5,522
	Provision for warranty	3,507			3,384			6,941			6,492
	Costs charged to accrual	(3,313		)	(3,153		)	(6,664		)	(6,057		)
	Change in estimated liability for pre-existing warranties	28			32			73			270
	Balance, end of period	$	6,822		$	6,227		$	6,822		$	6,227

Fair_Value_Disclosure_Tables

Fair Value Disclosure (Tables)	6 Months Ended
	Dec. 31, 2013
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 December 31, 2013 and June 30, 2013 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):
	December 31, 2013	Level 1		Level 2			Level 3			Asset at
										Fair Value
	Money market funds	$	310	$	—		$	—		$	310
	Auction rate securities	—		—			2,637			2,637
	Total	$	310	$	—		$	2,637		$	2,947
	June 30, 2013	Level 1		Level 2			Level 3			Asset at
										Fair Value
	Money market funds	$	310	$	—		$	—		$	310
	Auction rate securities	—		—			2,637			2,637
	Total	$	310	$	—		$	2,637		$	2,947
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	'
	The following table provides a reconciliation of the Company’s financial assets measured at fair value on a recurring basis, consisting of long-term auction rate securities, using significant unobservable inputs (Level 3) for the three and six months ended December 31, 2013 and 2012 (in thousands):
		Three Months Ended					Six Months Ended
		December 31,					December 31,
		2013		2012			2013			2012
	Balance as of beginning of period	$	2,637	$	2,923		$	2,637		$	2,923
	Total realized gains or (losses) included in net income	—		—			—			—
	Total unrealized gains or (losses) included in other comprehensive income	—		27			—			27
	Sales and settlements at par	—		(300		)	—			(300		)
	Transfers in and/or out of Level 3	—		—			—			—
	Balance as of end of period	$	2,637	$	2,650		$	2,637		$	2,650
Schedule of Long-term Investments Reconciliation	'
	The following is a summary of the Company’s long-term investments as of December 31, 2013 and June 30, 2013 (in thousands):
		December 31, 2013
		Amortized		Gross			Gross			Fair Value
		Cost		Unrealized			Unrealized
				Holding			Holding
				Gains			Losses
	Auction rate securities	$	2,750	$	—		$	(113	)	$	2,637
		June 30, 2013
		Amortized		Gross			Gross			Fair Value
		Cost		Unrealized			Unrealized
				Holding			Holding
				Gains			Losses
	Auction rate securities	$	2,750	$	—		$	(113	)	$	2,637

ShortTerm_and_LongTerm_Obligat1

Short-Term and Long-Term Obligations (Tables)	6 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Schedule of Short-term and Long-term Obligations	'
	Short-term and long-term obligations as of December 31, 2013 and June 30, 2013 consisted of the following (in thousands):
		December 31,			June 30,
		2013			2013
	Lines of credit:
	Bank of America	$	10,899		$	10,899
	CTBC Bank	3,520			—
	Total line of credit	14,419			10,899
	Building term loans:
	Bank of America	7,933			9,333
	CTBC Bank	19,989			14,939
	Total building term loans	27,922			24,272
	Total debt	42,341			35,171
	Current portion	(37,208		)	(28,638		)
	Long-term portion	$	5,133		$	6,533

Segment_Reporting_Tables

Segment Reporting (Tables)	6 Months Ended
	Dec. 31, 2013
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 and six months ended December 31, 2013 and 2012, of net sales by geographic region (in thousands):
		Three Months Ended					Six Months Ended
		December 31,					December 31,
		2013		2012			2013			2012
	Net sales:
	United States	$	179,571	$	156,533		$	354,785		$	291,359
	Europe	84,977		66,874			156,162			130,323
	Asia	82,211		60,413			137,183			125,097
	Other	9,603		7,667			17,248			15,415
		$	356,362	$	291,487		$	665,378		$	562,194
Summary of Long-Lived Assets	'
	The following is a summary of long-lived assets, excluding financial instruments, deferred tax assets and other assets (in thousands):
		December 31,		June 30,
		2013		2013
	Long-lived assets:
	United States	$	91,497	$	61,976
	Asia	36,193		33,500
	Europe	382		436
		$	128,072	$	95,912
Summary of Net Sales by Product Type	'
	The following is a summary of net sales by product type (in thousands):
		Three Months Ended										Six Months Ended
		December 31,										December 31,
		2013				2012						2013				2012
		Amount		Percent of		Amount			Percent of			Amount		Percent of		Amount		Percent of
				Net Sales					Net Sales					Net Sales				Net Sales
	Server systems	$	174,072	48.8	%	$	126,117		43.3	%		$	317,355	47.7	%	$	232,966	41.4	%
	Subsystems and accessories	182,290		51.2	%	165,370			56.7	%		348,023		52.3	%	329,228		58.6	%
	Total	$	356,362	100	%	$	291,487		100	%		$	665,378	100	%	$	562,194	100	%

Summary_of_Significant_Account2

Summary of Significant Accounting Policies - Consolidation (Details) (Variable Interest Entity, Primary Beneficiary [Member], Super Micro Business Park, Inc. [Member], USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	31-May-12
Variable Interest Entity, Primary Beneficiary [Member] | Super Micro Business Park, Inc. [Member]	'	'	'	'	'
Summary of Significant Accounting Policies [Abstract]	'	'	'	'	'
Contributions in variable interest entity	$168	'	$168	'	$168
Noncontrolling interest, ownership percentage by the Company	50.00%	'	50.00%	'	50.00%
Net income (loss) attributable to noncontrolling interest	($7)	$2	($13)	$0	'

Equity_Incentive_Plans_Details

Equity Incentive Plans (Details)	1 Months Ended	6 Months Ended
	Jan. 31, 2011	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Authorized shares available for future issuance under all equity incentive plans	'	1,115,296
2006 Equity Incentive Plan [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Increased additional shares authorized for future issuance	2,000,000	'
Increase in number of shares of common stock reserved for issuance under the 2006 Plan	'	3.00%
Minimum percentage of shares owned by employee for ISO	'	10.00%
Stock options granted term	'	'10 years
Stock options, vesting period	'	'4 years
Stock options vesting rights	'	'25% at the end of one year and one sixteenth per quarter thereafter
Percentage of options vested at the end of one year	'	25.00%
Percentage of options vested at the end of each quarter	'	6.25%
Maximum [Member] | 2006 Equity Incentive Plan [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Percentage of fair market value	'	110.00%
Minimum [Member] | 2006 Equity Incentive Plan [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Percentage of fair market value	'	100.00%

Restricted_Stock_Awards_Detail

Restricted Stock Awards (Details)	6 Months Ended		1 Months Ended
	Dec. 31, 2013	Dec. 31, 2013	Aug. 31, 2008	Dec. 31, 2013	Jun. 30, 2013
		Restricted Stock [Member]	Chief Executive Officer [Member]	Chief Executive Officer [Member]	Chief Executive Officer [Member]
			Restricted Stock [Member]	Restricted Stock [Member]	Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Exercise of stock options, shares	714,375	'	925,000	'	'
Restricted stock awards granted, shares	'	3,500	898,205	'	'
Restricted stock awards, vesting period	'	'	'5 years	'	'
Restricted stock awards vested, shares	'	'	'	898,205	718,564

Determining_Fair_Value_Details

Determining Fair Value (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Risk free interest rate, minimum	'	'	1.53%	0.65%
Risk free interest rate, maximum	'	'	1.54%	0.81%
Risk free interest rate	1.53%	0.81%	'	'
Expected life	'5 years 6 months	'5 years 1 month 9 days	'	'
Dividend yield	0.00%	0.00%	0.00%	0.00%
Volatility, minimum	'	'	50.05%	51.29%
Volatility, maximum	'	'	50.07%	51.57%
Volatility	50.07%	51.57%	'	'
Weighted average fair value	$6.63	$4.17	$6.24	$4.91
Stock-based compensation expense before taxes	$2,788	$2,909	$5,377	$5,812
Income tax impact	-381	-181	-669	-409
Stock-based compensation expense, net	2,407	2,728	4,708	5,403
Excess tax benefits accounted in additional paid-in capital	'	'	1,532	1,494
Excess tax benefit from financing activities	'	'	1,084	785
Maximum [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Expected life	'	'	'5 years 6 months	'5 years 1 month 9 days
Minimum [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Expected life	'	'	'5 years 5 months 28 days	'5 years 0 months 11 days
Cost of Sales [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock-based compensation expense before taxes	245	224	480	464
Research and Development Expense [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock-based compensation expense before taxes	1,709	1,632	3,270	3,262
Sales and Marketing Expense [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock-based compensation expense before taxes	305	389	619	793
General and Administrative Expense [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock-based compensation expense before taxes	$529	$664	$1,008	$1,293

Stock_Option_Activity_Details_

Stock Option Activity (Details Table) (USD $)	6 Months Ended	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]	'	'
Number of shares, beginning	12,206,178	'
Number of shares, stock options granted	945,620	'
Number of shares, options exercised	-714,375	'
Number of shares, options forfeited or cancelled	-155,947	'
Number of shares, ending	12,281,476	12,206,178
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]	'	'
Beginning balance, weighted average exercise price per share, options outstanding	$10.83	'
Weighted average exercise price per share, options granted	$13.40	'
Weighted average exercise price per share, options exercised	$6.70	'
Weighted average exercise price per share, options forfeited or cancelled	$13.94	'
Ending balance, weighted average exercise price per share, options outstanding	$11.23	$10.83
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]	'	'
Balance, weighted average remaining contractual term of options outstanding	'6 years 1 month 12 days	'6 years 2 months 23 days
Balance, aggregate intrinsic value of options outstanding	$74,943	$22,631
Number of shares options vested and expected to vest	12,009,051	'
Weighted average exercise price per share, options vested and expected to vest	$11.19	'
Weighted average remaining contractual term, options vested and expected to vest	'6 years 0 months 18 days	'
Aggregate intrinsic value of options vested and expected to vest	73,834	'
Number of shares options vested and exercisable	8,880,986	'
Weighted average exercise price per share, options vested and exercisable	$10.28	'
Weighted average remaining contractual term, options vested and exercisable	'5 years 1 month 20 days	'
Aggregate intrinsic value of options vested and exercisable	$62,395	'

Stock_Option_and_Restricted_St

Stock Option and Restricted Stock Award Activity (Details Textual) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Total pretax intrinsic value of options exercised	$3,234	$2,190	$5,215	$3,068
Unrecognized compensation cost related to non-vested stock-based awards	18,757	'	18,757	'
Unrecognized compensation cost related to non-vested stock based awards, period for recognition	'	'	'2 years 4 months 21 days	'
Payments related to tax withholding for share-based compensation	'	'	651	1,022
Restricted Stock [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Pretax intrinsic value of restricted stock awards vested	0	0	2,337	2,190
Restricted stock awards vested, shares	'	'	179,641	179,641
Shares withheld for taxes	'	'	50,000	83,857
Total intrinsic value of the outstanding restricted stock awards	60	'	60	'
Officer [Member] | Restricted Stock [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Payments related to tax withholding for share-based compensation	'	'	$651	$1,022

Restricted_Stock_Award_Activit

Restricted Stock Award Activity (Details Table) (Restricted Stock [Member], USD $)	6 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Restricted Stock [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]	'	'
Nonvested stock, beginning of period	179,641	'
Vested	-179,641	-179,641
Granted	3,500	'
Forfeited	0	'
Nonvested stock, end of period	3,500	'
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]	'	'
Nonvested stock, beginning of period	$10.66	'
Granted	$14.23	'
Vested	$10.66	'
Forfeited	$0	'
Nonvested stock, end of period	$14.23	'

Net_Income_per_Common_Share_De

Net Income per Common Share (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]	'	'	'	'
Net income	$13,335	$4,914	$21,034	$5,813
Less: undistributed earnings allocated to participating securities	-1	-21	-28	-33
Net income attributable to common shares - basic	13,334	4,893	21,006	5,780
Weighted-average number of common shares used to compute basic net income per common share	42,915	41,893	42,706	41,780
Basic net income per common share	$0.31	$0.12	$0.49	$0.14
Earnings Per Share, Diluted [Abstract]	'	'	'	'
Less: Undistributed earnings allocated to participating securities	-1	-21	-26	-31
Net income attributable to common shares - diluted	$13,334	$4,893	$21,008	$5,782
Dilutive effect of options to purchase common stock	2,124	1,538	2,346	2,039
Weighted-average number of common shares used to compute diluted net income per common share	45,039	43,431	45,052	43,819
Diluted net income per common share	$0.30	$0.11	$0.47	$0.13
Anti-dilutive outstanding stock options, shares	6,288	7,293	5,461	5,842

Balance_Sheet_Components_Inven

Balance Sheet Components - Inventory(Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2013
Balance Sheet Related Disclosures [Abstract]	'	'	'	'	'
Finished goods	$215,857	'	$215,857	'	$185,459
Work in process	22,856	'	22,856	'	10,440
Purchased parts and raw materials	52,214	'	52,214	'	58,271
Total inventory	290,927	'	290,927	'	254,170
Provision for inventory	$1,534	$3,403	$1,538	$6,313	'

Balance_Sheet_Components_Prope

Balance Sheet Components - Property, Plant, and Equipment (Details) (USD $)	Dec. 31, 2013	Oct. 31, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified		acre
		sqft
Property, Plant and Equipment [Line Items]	'	'	'
Property, plant and equipment, gross	$165,132	'	$130,288
Accumulated depreciation and amortization	-37,060	'	-34,376
Property, plant and equipment, net	128,072	'	95,912
Significant acquisition of real property	'	30,158	'
Square footage of building	'	324,000	'
Acre of land	'	36	'
Land [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, plant and equipment, gross	63,952	'	41,774
Significant acquisition of real property	'	22,178	'
Building [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, plant and equipment, gross	51,959	'	43,979
Significant acquisition of real property	'	7,980	'
Building and Leasehold Impovements [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, plant and equipment, gross	7,547	'	7,483
Machinery and Equipment [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, plant and equipment, gross	31,315	'	26,941
Furniture and Fixtures [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, plant and equipment, gross	4,852	'	4,731
Purchased Software [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, plant and equipment, gross	$5,507	'	$5,380

Balance_Sheet_Components_Other

Balance Sheet Components - Other Assets (Details) (USD $)	Dec. 31, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified
Balance Sheet Related Disclosures [Abstract]	'	'
Long-term prepaid royalty license	$1,371	$1,496
Restricted cash	855	847
Investment in a privately held company	750	750
Other	147	148
Total other assets	$3,123	$3,241

Balance_Sheet_Components_Accru

Balance Sheet Components - Accrued Liabilities (Details) (USD $)	Dec. 31, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified
Accrued Liabilities [Abstract]	'	'
Accrued payroll and related expenses	$12,834	$12,084
Customer prepayments	4,614	4,134
Accrued warranty costs	6,822	6,472
Accrued cooperative marketing expenses	3,952	4,016
Others	7,707	7,416
Total accrued liabilities	$35,929	$34,122

Balance_Sheet_Components_Warra

Balance Sheet Components - Warranty (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Movement in Standard Product Warranty Accrual [Roll Forward]	'	'	'	'
Balance, beginning of period	$6,600	$5,964	$6,472	$5,522
Provision for warranty	3,507	3,384	6,941	6,492
Costs charged to accrual	-3,313	-3,153	-6,664	-6,057
Change in estimated liability for pre-existing warranties	28	32	73	270
Balance, end of period	$6,822	$6,227	$6,822	$6,227

LongTerm_Investments_Details

Long-Term Investments (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2013
Schedule of Investments [Line Items]	'	'	'	'	'
Fair value inputs, discount rate	'	'	1.51%	'	'
Fair value inputs, time period until redemption	'	'	'3 years	'	'
Fair value inputs, estimated rate of return	'	'	0.26%	'	'
Fair value investment, increase or decrease in rate of return	'	'	1.00%	'	'
Fair value investment, increase or decrease in term	'	'	'1 year	'	'
Auction Rate Securities [Member]	'	'	'	'	'
Schedule of Investments [Line Items]	'	'	'	'	'
Auction-rate securities, net of unrealized losses	$2,637	'	$2,637	'	$2,637
Change in fair value	0	27	0	27	'
Auction rate security, gross unrealized holding loss	113	'	113	'	113
Accumulated unrealized income (loss), net of tax	-68	'	-68	'	-68
Auction rate securities, redeemed at par	$0	$300	$0	$300	'
Minimum [Member]	'	'	'	'	'
Schedule of Investments [Line Items]	'	'	'	'	'
Fair value, change in investment portfolio	'	'	1.00%	'	'
Maximum [Member]	'	'	'	'	'
Schedule of Investments [Line Items]	'	'	'	'	'
Fair value, change in investment portfolio	'	'	3.00%	'	'

Fair_Value_Disclosure_Assets_a

Fair Value Disclosure - Assets and Liabilities Measured at Recurring Basis (Details) (USD $)	Dec. 31, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified
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	$310	$310
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, fair value	42,341	35,171
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	2,637	2,637
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets, fair value	2,947	2,947
Cash [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and cash equivalents, fair value	89,337	92,495
Certificates of Deposit [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Certificates of deposit, fair value	1,150	1,139
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	310	310
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
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and cash equivalents, fair value	310	310
Auction Rate Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Auction rate securities, fair value	2,637	2,637
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
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
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	2,637	2,637
Auction Rate Securities [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Auction rate securities, fair value	$2,637	$2,637

Fair_Value_Disclosure_Assets_M

Fair Value Disclosure - Assets Measured on Recurring Basis, Unobservable Input Reconciliation (Details) (Fair Value, Inputs, Level 3 [Member], Fair Value, Measurements, Recurring [Member], USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'
Balance, beginning of the period	$2,637	$2,923	$2,637	$2,923
Total realized gains or (losses) included in net income	0	0	0	0
Total unrealized gains or (losses) included in other comprehensive income	0	27	0	27
Sales and settlements at par	0	-300	0	-300
Transfer in and/or out of Level 3	0	0	0	0
Balance, ending of the period	$2,637	$2,650	$2,637	$2,650

Fair_Value_Disclosure_Longterm

Fair Value Disclosure - Long-term Investment (Details) (Auction Rate Securities [Member], USD $)	Dec. 31, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified
Auction Rate Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Auction rate securities, amortized cost	$2,750	$2,750
Auction rate securities, gross unrealized holding gain	0	0
Auction rate security, gross unrealized holding loss	-113	-113
Auction rate securities, fair value	$2,637	$2,637

ShortTerm_and_Longterm_Debt_De

Short-Term and Long-term Debt (Details Table) (USD $)	Dec. 31, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified
Debt Instrument [Line Items]	'	'
Total debt	$42,341	$35,171
Debt, Current	-37,208	-28,638
Long-term portion	5,133	6,533
Revolving Credit Facility [Member]	'	'
Debt Instrument [Line Items]	'	'
Total debt	14,419	10,899
Revolving Credit Facility [Member] | Bank of America [Member]	'	'
Debt Instrument [Line Items]	'	'
Total debt	10,899	10,899
Revolving Credit Facility [Member] | CTBC Bank [Member]	'	'
Debt Instrument [Line Items]	'	'
Total debt	3,520	0
Secured Debt [Member]	'	'
Debt Instrument [Line Items]	'	'
Total debt	27,922	24,272
Secured Debt [Member] | Bank of America [Member]	'	'
Debt Instrument [Line Items]	'	'
Total debt	7,933	9,333
Secured Debt [Member] | CTBC Bank [Member]	'	'
Debt Instrument [Line Items]	'	'
Total debt	$19,989	$14,939

ShortTerm_and_LongTerm_Obligat2

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

Dec. 31, 2013

Jun. 30, 2013

Dec. 31, 2013

Oct. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Nov. 30, 2013

Nov. 30, 2013

Jun. 30, 2013

Oct. 30, 2011

Oct. 30, 2011

Dec. 31, 2013

Dec. 31, 2013

Jun. 30, 2013

Dec. 31, 2013

Dec. 31, 2013

Jun. 30, 2013

Dec. 31, 2013

Dec. 31, 2013

Jun. 30, 2013

Oct. 31, 2011

Dec. 31, 2013

Jun. 30, 2013

Nov. 30, 2013

Nov. 30, 2013

Dec. 31, 2013

Jun. 30, 2013

Jul. 31, 2012

Jul. 31, 2012

Oct. 31, 2011

Nov. 30, 2013

Jul. 31, 2012

Nov. 30, 2013

Nov. 30, 2013

Nov. 30, 2013

Dec. 31, 2013

Jun. 30, 2013

Dec. 31, 2013

Jun. 30, 2013

Nov. 30, 2013

Nov. 30, 2013

Dec. 31, 2013

Jun. 30, 2013

Oct. 31, 2011

Nov. 30, 2013

Dec. 31, 2013

USD ($)

USD ($)

Bank of America [Member]

Bank of America [Member]

CTBC Bank [Member]

CTBC Bank [Member]

CTBC Bank [Member]

CTBC Bank [Member]

CTBC Bank [Member]

CTBC Bank [Member]

CTBC Bank [Member]

London Interbank Offered Rate (LIBOR) [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Secured Debt [Member]

Secured Debt [Member]

Secured Debt [Member]

Secured Debt [Member]

Secured Debt [Member]

Secured Debt [Member]

Secured Debt [Member]

Secured Debt [Member]

Secured Debt [Member]

Secured Debt [Member]

Secured Debt [Member]

Secured Debt [Member]

Secured Debt [Member]

Secured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

USD ($)

USD ($)

USD ($)

TWD

USD ($)

TWD

USD ($)

TWD

Bank of America [Member]

Bank of America [Member]

Bank of America [Member]

CTBC Bank [Member]

Bank of America [Member]

Bank of America [Member]

CTBC Bank [Member]

USD ($)

USD ($)

Bank of America [Member]

Bank of America [Member]

Bank of America [Member]

CTBC Bank [Member]

CTBC Bank [Member]

CTBC Bank [Member]

CTBC Bank [Member]

CTBC Bank [Member]

CTBC Bank [Member]

London Interbank Offered Rate (LIBOR) [Member]

CTBC's Established NTD Interest Rate [Member]

CTBC's Established NTD Interest Rate [Member]

CTBC Bank [Member]

CTBC Bank [Member]

CTBC's Established NTD Interest Rate [Member]

USD ($)

USD ($)

Bank of America [Member]

Bank of America [Member]

CTBC Bank [Member]

CTBC Bank [Member]

CTBC Bank [Member]

CTBC Bank [Member]

London Interbank Offered Rate (LIBOR) [Member]

CTBC's Established USD Interest Rate [Member]

Minimum [Member]

USD ($)

USD ($)

USD ($)

USD ($)

TWD

USD ($)

USD ($)

USD ($)

TWD

Bank of America [Member]

CTBC Bank [Member]

CTBC Bank [Member]

USD ($)

TWD

CTBC Bank [Member]

USD ($)

USD ($)

USD ($)

TWD

USD ($)

USD ($)

Bank of America [Member]

CTBC Bank [Member]

Bank of America [Member]

Building

Building

Consecutive_Quarters

USD ($)

Short-term and long-term obligations

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit facility, maximum borrowing capacity

'

'

'

$40,000,000

'

'

$33,981,000

1,000,000,000

'

$9,898,000

300,000,000

'

'

'

'

'

'

'

'

'

'

'

'

$23,787,000

700,000,000

'

'

'

'

'

'

'

$3,398,000

100,000,000

'

'

'

'

'

$16,991,000

500,000,000

'

'

'

'

'

Term loan, face amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

14,000,000

'

'

'

'

'

'

14,912,000

450,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of buildings as collateral

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3

3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit facility, basis spread on variable rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.50%

0.25%

0.30%

'

'

0.25%

'

'

'

'

'

'

'

'

1.25%

0.30%

'

Interest rate, period end

'

'

'

'

'

'

'

'

1.20%

'

'

0.17%

1.20%

1.23%

1.11%

1.67%

1.69%

1.74%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit facility, total outstanding balance

42,341,000

35,171,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

27,922,000

24,272,000

'

7,933,000

9,333,000

'

'

19,989,000

14,939,000

'

'

'

'

'

'

'

'

14,419,000

10,899,000

10,899,000

10,899,000

'

'

3,520,000

0

'

'

'

Line of credit facility, unused amount

'

'

29,101,000

'

9,806,000

294,340,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt, term

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'5 years

'

'

'13 months

'13 months

'

'

'

'

'

'

'

'13 months

'13 months

'

'

'

'

'

'13 months

'13 months

'

'

'

'

'

Percent of eligible accounts receivable

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

80.00%

80.00%

'

'

'

'

'

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

Total assets collateralizing line of credit

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

663,476,000

586,742,000

'

'

'

'

'

'

'

Total assets collateralizing term loan

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$17,699,000

$17,813,000

'

'

$27,556,000

$27,702,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

RelatedParty_and_Other_Transac1

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

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

In Thousands, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Jun. 30, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Jun. 30, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

31-May-12

Super Micro [Member]

Ablecom [Member]

Ablecom [Member]

Ablecom [Member]

Ablecom [Member]

Ablecom [Member]

Ablecom [Member]

Ablecom [Member]

Minimum [Member]

Maximum [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Immediate Family Member of Management or Principal Owner [Member]

Immediate Family Member of Management or Principal Owner [Member]

CEO's Other Family Members [Member]

Ablecom [Member]

Ablecom [Member]

Super Micro Business Park, Inc. [Member]

Super Micro Business Park, Inc. [Member]

Super Micro Business Park, Inc. [Member]

Super Micro Business Park, Inc. [Member]

Super Micro Business Park, Inc. [Member]

Related Party Transaction [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Ablecom ownership percentage in Compuware is lower than

'

'

'

'

'

'

'

'

'

'

'

'

'

'

50.00%

'

'

'

'

'

Ownership percentage of Company own by Steve Liang

'

'

'

'

'

1.10%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Ownership percentage of Ablecom own by Charles Liang and his wife

'

'

'

'

'

'

'

'

'

'

'

10.50%

'

'

'

'

'

'

'

'

Ownership percentage of Ablecom own by Steve Liang and other family members

'

'

'

'

'

'

'

'

'

'

'

'

35.90%

'

'

'

'

'

'

'

Purchases from Ablecom

'

'

'

'

'

'

$54,424

$38,683

$99,741

$87,940

'

'

'

'

'

'

'

'

'

'

Net sales from Ablecom

3,859

2,898

7,387

5,791

'

'

3,859

2,898

7,387

5,791

'

'

'

'

'

'

'

'

'

'

Amounts owed to the Company by Ablecom

417

'

417

'

974

'

417

'

417

'

974

'

'

'

'

'

'

'

'

'

Amounts owed to Ablecom by the Company

48,150

'

48,150

'

50,448

'

48,150

'

48,150

'

50,448

'

'

'

'

'

'

'

'

'

Majority of invoiced paid to Ablecom, minimum days

'

'

'

'

'

'

'

'

'

'

'

'

'

'55 days

'

'

'

'

'

'

Majority of invoiced paid to Ablecom, maximum days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'93 days

'

'

'

'

'

Tooling assets and miscellaneous costs paid to Ablecom

'

'

'

'

'

'

1,460

1,483

3,736

2,867

'

'

'

'

'

'

'

'

'

'

Outstanding purchase order with Ablecom

'

'

'

'

'

'

63,352

'

63,352

'

53,684

'

'

'

'

'

'

'

'

'

Contributions in Supermicro Business Park, Inc.

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

168

'

168

'

168

Noncontrolling interest, ownership percentage by the Company

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

50.00%

'

50.00%

'

50.00%

Net income (loss) attributable to Ablecom's interest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

($7)

$2

($13)

$0

'

Income_Tax_Details

Income Tax (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]	'	'	'	'
Provisions for income taxes	$6,731	$2,549	$10,897	$3,192
Effective tax rate	33.50%	34.20%	34.10%	35.40%
Unrecognized tax benefits	9,194	'	9,194	'
Unrecognized tax benefits, income tax penalties and interest accrued	$851	'	$851	'

Commitment_and_Contingencies_D

Commitment and Contingencies (Details) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Loss Contingencies [Line Items]	'
Purchase commitment	$257,728
Hard Disk Drive [Member]	'
Loss Contingencies [Line Items]	'
Purchase commitment	$89,819

Revenue_from_Segments_Details

Revenue from Segments (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]	'	'	'	'
Net sales	$356,362	$291,487	$665,378	$562,194
United States [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net sales	179,571	156,533	354,785	291,359
Europe [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net sales	84,977	66,874	156,162	130,323
Asia [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net sales	82,211	60,413	137,183	125,097
Other region [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net sales	$9,603	$7,667	$17,248	$15,415

Segment_Reporting_of_LongLived

Segment Reporting of Long-Lived Assets (Details) (USD $)	Dec. 31, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified
Segment Reporting Information [Line Items]	'	'
Long-lived assets:	$128,072	$95,912
United States [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Long-lived assets:	91,497	61,976
Asia [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Long-lived assets:	36,193	33,500
Europe [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Long-lived assets:	$382	$436

Revenue_by_Product_Type_Detail

Revenue by Product Type (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2013
	Customer				Customer
Segment Reporting Information [Line Items]	'	'	'	'	'
Customers accounted for 10% or more of accounts receivable	0	'	'	'	1
Net sales	$356,362	$291,487	$665,378	$562,194	'
Server systems [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Net sales	174,072	126,117	317,355	232,966	'
Subsystems and accessories [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Net sales	$182,290	$165,370	$348,023	$329,228	'
Sales [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Concentration Risk, Percentage	100.00%	100.00%	100.00%	100.00%	'
Sales [Member] | Server systems [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Concentration Risk, Percentage	48.80%	43.30%	47.70%	41.40%	'
Sales [Member] | Subsystems and accessories [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Concentration Risk, Percentage	51.20%	56.70%	52.30%	58.60%	'
Customer Concentration Risk [Member] | One Customer [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Concentration Risk, Percentage	'	'	'	'	14.40%