InvenSense 10-Q 7 Aug 14 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Jun. 29, 2014	Jul. 18, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	29-Jun-14	'
Document Fiscal Year Focus	'2015	'
Document Fiscal Period Focus	'Q1	'
Entity Registrant Name	'InvenSense Inc	'
Entity Central Index Key	'0001294924	'
Current Fiscal Year End Date	'--03-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	88,875,980

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Jun. 29, 2014	Mar. 30, 2014
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$36,426	$26,025
Short-term investments	110,034	91,307
Accounts receivable	36,358	39,009
Inventories	77,513	73,032
Prepaid expenses and other current assets	17,773	19,587
Total current assets	278,104	248,960
Property and equipment, net	31,786	25,239
Intangible assets, net	34,093	35,360
Goodwill	50,952	50,952
Long-term investments	99,778	128,755
Other assets	6,148	5,469
Total assets	500,861	494,735
Current liabilities:	'	'
Accounts payable	18,568	18,964
Accrued liabilities	13,563	14,985
Total current liabilities	32,131	33,949
Long-term debt	137,387	135,583
Other long-term liabilities	12,851	11,375
Total liabilities	182,369	180,907
Commitments and contingencies (Note 4)	'	'
Preferred stock:	'	'
Preferred stock, $0.001 par value - 20,000 shares authorized, no shares issued and outstanding at June 29, 2014 and March 30, 2014	'	'
Common stock:	'	'
Common stock, $0.001 par value - 750,000 shares authorized, 88,764 shares issued and outstanding at June 29, 2014, 88,332 shares issued and outstanding at March 30, 2014	225,363	215,958
Accumulated other comprehensive income (loss)	53	-38
Retained earnings	93,076	97,908
Total stockholders' equity	318,492	313,828
Total liabilities and stockholders' equity	$500,861	$494,735

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 29, 2014	Mar. 30, 2014
In Thousands, except Per Share data, unless otherwise specified
Statement Of Financial Position [Abstract]	'	'
Preferred stock, par value	$0.00	$0.00
Preferred stock, shares authorized	20,000	20,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	750,000	750,000
Common stock, shares issued	88,764	88,332
Common stock, shares outstanding	88,764	88,332

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 29, 2014	Jun. 30, 2013
Income Statement [Abstract]	'	'
Net revenue	$66,681	$55,910
Cost of revenue	35,505	26,591
Gross profit	31,176	29,319
Operating expenses:	'	'
Research and development	19,408	8,114
Selling, general and administrative	13,918	9,155
Total operating expenses	33,326	17,269
Income (loss) from operations	-2,150	12,050
Interest (expense)	-2,584	'
Other income, net	181	80
Other income (expense), net	-2,403	80
Income (loss) before income taxes	-4,553	12,130
Income tax provision	279	1,808
Net income (loss)	($4,832)	$10,322
Net income (loss) per share:	'	'
Basic	($0.05)	$0.12
Diluted	($0.05)	$0.12
Weighted average shares outstanding in computing net income (loss) per share:	'	'
Basic	88,302	85,038
Diluted	88,302	87,914

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Jun. 29, 2014	Jun. 30, 2013
Statement Of Income And Comprehensive Income [Abstract]	'	'
Net income (loss)	($4,832)	$10,322
Other comprehensive income:	'	'
Unrealized gain (loss) on available-for-sale investments, net of tax benefit of $49 and $29 for three months ended June 29, 2014 and June 30, 2013, respectively	91	-66
Total comprehensive income (loss)	($4,741)	$10,256

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Jun. 29, 2014	Jun. 30, 2013
Statement Of Income And Comprehensive Income [Abstract]	'	'
Unrealized gain (loss) on available-for-sale investments, tax benefit	$49	$29

Condensed_Consolidated_Stateme3

Condensed Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Jun. 29, 2014	Jun. 30, 2013
Cash flows from operating activities:	'	'
Net income (loss)	($4,832)	$10,322
Adjustments to reconcile net income (loss) to net cash provided by operating activities:	'	'
Depreciation	1,747	675
Amortization of intangible assets	1,268	'
Loss on disposal of property and equipment	'	1
Stock-based compensation expense	7,635	2,818
Deferred income tax assets	-2	-52
Tax effect of employee benefit plans	'	2,724
Excess tax benefit from stock-based compensation	'	-2,724
Non cash interest expense	1,816	'
Changes in operating assets and liabilities:	'	'
Accounts receivable	2,651	-1,803
Inventories	-4,480	-9,953
Prepaid expenses and other current assets	1,781	-2,301
Other assets	-688	-500
Accounts payable	-230	6,758
Accrued liabilities	20	428
Net cash provided by operating activities	6,686	6,393
Cash flows from investing activities:	'	'
Purchase of property and equipment	-8,424	-3,954
Proceeds from the sale of property and equipment	'	1
Sales and maturities of available-for-sale investments	10,387	28,526
Purchase of available-for-sale investments	'	-27,514
Net cash provided by (used in) investing activities	1,963	-2,941
Cash flows from financing activities:	'	'
Proceeds from issuance of common stock	1,755	3,208
Payments of long-term debt and capital lease obligations	-3	-3
Excess tax benefit from stock-based compensation	'	2,724
Net cash provided by financing activities	1,752	5,929
Net increase in cash and cash equivalents	10,401	9,381
Cash and cash equivalents:	'	'
Beginning of period	26,025	100,843
End of period	36,426	110,224
Supplemental disclosures of cash flow information:	'	'
Cash paid for interest	1,429	'
Cash paid for income taxes	93	87
Noncash investing and financing activities:	'	'
Unpaid purchases of property and equipment	1,641	1,555
Unrealized (loss) gain from available-for-sale investments	81	-95
Proceeds receivable from the exercise of stock options	$78	$1,366

Organization_and_Summary_of_Si

Organization and Summary of Significant Accounting Policies	3 Months Ended
	Jun. 29, 2014
Accounting Policies [Abstract]	'
Organization and Summary of Significant Accounting Policies	'
	1. Organization and Summary of Significant Accounting Policies
	Business
	InvenSense, Inc. (“the Company”) was incorporated in California in June 2003 and reincorporated in Delaware in January 2004. The Company designs, develops, markets and sells Micro-Electro-Mechanical Systems (“MEMS”) sensors, such as accelerometers, gyroscopes and microphones for consumer electronics, and is dedicated to bringing the best-in-class size, performance and cost solutions to market. Targeting applications in smartphones and tablets, console and portable video gaming devices, digital still and video cameras, smart TVs (including digital set-top boxes, televisions and multi-media HDDs), navigation devices, toys, and health and fitness accessories, the Company delivers leading solutions based on its advanced multi-axis technology.
	These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes thereto for the fiscal year ended March 30, 2014 included in the Company’s Annual Report on Form 10-K filed on May 29, 2014 with the Securities and Exchange Commission (“SEC”). No material changes have been made to the Company’s significant accounting policies since the Company’s Annual Report on Form 10-K for the fiscal year ended March 30, 2014.
	Certain Significant Business Risks and Uncertainties
	The Company participates in the high-technology industry and believes that adverse changes in any of the following areas could have a material effect on the Company’s future financial position, results of operations, or cash flows: reliance on a limited number of primary customers to support the Company’s revenue generating activities; advances and trends in new technologies and industry standards; market acceptance of the Company’s products; development of sales channels; strategic relationships, including key component suppliers; litigation or claims against the Company based on intellectual property, patent, product, regulatory, or other factors; and the Company’s ability to attract and retain employees necessary to support its growth.
	Basis of Consolidation
	The consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles, or GAAP, and include our accounts and the accounts of our wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. The functional currency of each of the Company’s subsidiaries is the U.S. dollar. Foreign currency gains or losses are recorded as other income (expense), net, in the consolidated statements of income.
	Fiscal Year
	The Company’s fiscal year is a 52 or 53 week period ending on the Sunday closest to March 31. The Company’s most recent fiscal year (“Fiscal 2014”) ended on March 30, 2014 (“March 2014”). The first fiscal quarter in each of the two most recent fiscal years ended on June 29, 2014 (“three months ended June 29, 2014” or “June 2014”) and June 30, 2013 (“three months ended June 30, 2013” or “June 2013”), respectively, and each quarter period included 13 weeks.
	Use of Estimates
	The preparation of the Company’s Consolidated Financial Statements and related Notes in conformity with accounting principles generally accepted in the United States of America (U.S. GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the Consolidated Financial Statements and related Notes and the reported amounts of income and expenses during the reporting period. Significant estimates included in the Consolidated Financial Statements and related Notes include income taxes, inventory valuation, stock-based compensation, loss contingencies, warranty reserves, valuation of acquired assets, and valuation of convertible senior notes, including the related convertible notes hedges and warrants. These estimates are based upon information available as of the date of the consolidated financial statements, and actual results could differ from those estimates.
	Concentration of Credit Risk
	At June 2014, one customer accounted for 47% of total accounts receivable. At June 2013, five customers each accounted for 16%, 14%, 11%, 11% and 10% of total accounts receivable.
	For the three months ended June 29, 2014, three customers each accounted for 30%, 12% and 10% of total net revenue. For the three months ended June 30, 2013, three customers each accounted for 26%, 11% and 11% of total net revenue.
	Warranty
	The Company’s warranty agreements are contract and component specific and can be up to three years for selected components. The Company’s accrual for anticipated warranty costs has declined primarily due to a decline in the historical volume of product returned under the warranty program. The accrual also includes management’s judgment regarding anticipated rates of warranty claims and associated repair costs. The following table summarizes the activity related to product warranty liability during the three months ended June 29, 2014 and June 30, 2013:
		Three Months Ended
		June 29, 2014			June 30, 2013
		(in thousands)
	Beginning balance	$	80		$	123
	Provision for warranty		53			115
	Accruals related to changes in estimate		(45	)		(94	)
	Less: actual warranty costs		(13	)		(8	)
	Ending balance	$	75		$	136
	Net Income (loss) Per Share
	Basic net income (loss) per share is computed by dividing net income (loss) by the weighted average number of shares outstanding during the period, which excludes dilutive unvested restricted stock.
	Diluted net income (loss) per share is computed by dividing net income (loss) by the weighted average number of shares outstanding, including unvested restricted stock, certain warrants to purchase common stock and potential dilutive shares from the dilutive effect of outstanding stock options using the treasury stock method.
	The following table presents the calculation of basic and diluted net income (loss) per share:
		Three Months Ended
		June 29, 2014			June 30, 2013
		(in thousands, except per share data)
	Numerator:
	Basic and Diluted:
	Net income (loss)	$	(4,832	)	$	10,322
	Denominator:
	Basic shares:
	Weighted average shares used in computing basic net income (loss) per share		88,302			85,038
	Diluted shares:
	Weighted average shares used in computing basic net income (loss) per share		88,302			85,038
	Effect of potentially dilutive securities:
	Stock options and unvested restricted stock		—			2,797
	Common stock warrants		—			79
	Weighted average shares used in computing diluted net income (loss) per share		88,302			87,914
	Net income (loss) per share:
	Basic	$	(0.05	)	$	0.12
	Diluted	$	(0.05	)	$	0.12
	The following summarizes the potentially dilutive securities outstanding at the end of each period that were excluded from the computation of diluted net income (loss) per share for the periods presented as their effect would have been antidilutive:
		Three Months Ended
		June 29, 2014			June 30, 2013
		(in thousands)
	Employee stock options		8,606			4,906
	Unvested restricted stock units and others		3,414			770
	Total antidilutive securities		12,020			5,676
	Recent Accounting Pronouncements
	In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606). ASU No. 2014-09 provides guidance that companies will recognize revenue to depict the transfer of goods or services to customers in amounts that reflect the payment to which a company expects to be entitled in exchange for those goods or services. The Company will be required to implement the new revenue recognition standard for the first quarter of fiscal year 2018. The Company is currently evaluating the impact on its consolidated financial statements.

Cash_Equivalents_and_Available

Cash Equivalents and Available-for-sale Investments	3 Months Ended
	Jun. 29, 2014
Cash And Cash Equivalents [Abstract]	'
Cash Equivalents and Available-for-sale Investments	'
	2	Cash Equivalents and Available-for-sale Investments
	At June 2014, of the $36.4 million of the Company’s cash and cash equivalents, $15.2 million was cash and $21.2 million was cash equivalents invested in money market funds and commercial paper. At June 2014, $12.7 million of the $36.4 million of cash and cash equivalents were held by our foreign subsidiaries. If these funds are needed for our operations in the United States, the Company would be required to accrue and pay U.S. taxes to repatriate these funds. However, the Company’s intent is to indefinitely reinvest these funds outside of the United States, and the Company’s current plans for the foreseeable future do not demonstrate a need to repatriate them to fund U.S. operations. Additionally, as of June 2014, the Company had short-term available-for-sale investments of $110.0 million and long-term available-for-sale investments of $99.8 million totaling $209.8 million. Long-term investments as of June 2014 of $99.8 million had scheduled maturities between one and five years from the balance sheet date.
	At March 2014, of the $26.0 million of the Company’s cash and cash equivalents, $15.3 million was cash and $10.7 million was cash equivalents invested in money market funds. At March 2014, $9.8 million of the $26.0 million of cash and cash equivalents were held by our foreign subsidiaries. If these funds are needed for our operations in the United States, the Company would be required to accrue and pay U.S. taxes to repatriate these funds. However, the Company’s intent is to indefinitely reinvest these funds outside of the United States, and the Company’s current plans for the foreseeable future do not demonstrate a need to repatriate them to fund U.S. operations. Additionally, as of March 2014, the Company had short-term available-for-sale investments of $91.3 million and long-term available-for-sale investments of $128.8 million totaling $220.1 million which is held in the US entity. Long-term investments as of March 2014 of $128.8 million had scheduled maturities between one and two years from the balance sheet date.
	The Company applies the provisions of ASC 820-10, “Fair Value Measurements”. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (i.e., the “exit price”) in an orderly transaction between market participants at the measurement date. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. ASC 820-10 requires disclosure that establishes a framework for measuring fair value and expands disclosure about fair value measurements. The standard describes a fair value hierarchy based on three levels of inputs that may be used to measure fair value. The inputs for the first two levels are considered observable and the last is unobservable and include the following:
	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 inputs which are observable, either directly or indirectly, for substantially the full term of the asset or liability; or
	Level 3—Unobservable inputs in which there is little or no market data, and as a result, prices or valuation techniques are employed that require inputs that are significant to the fair value measurement.
	This hierarchy requires the Company to use observable market data, when available, and to minimize the use of unobservable inputs when determining fair value. On a recurring basis, the Company measures certain financial assets and liabilities at fair value.
	The fair values of our money market funds were derived from quoted market prices as active markets for these instruments exist. The Company chose not to elect the fair value option as prescribed by ASC 825-10-05 “Fair Value Option” for its financial assets and liabilities that had not been previously carried at fair value. Therefore, financial assets and liabilities not carried at fair value, such as accounts payable, are still reported at their carrying values.
	Fair value measurements at each reporting date were as follows:
	June 2014:
	Assets measured at fair value on a recurring basis were presented in the Company’s condensed consolidated balance sheet as of June 29, 2014.
			June 2014		Quoted Prices		Significant			Significant
			Balance		in Active		Other			Other
					Markets for		Observable			Unobservable
					Identical		Inputs			Inputs
					Assets Level 1		Level 2			Level 3
			(in thousands)
	Money Market Funds		$	21,235	$	21,235	$	—		$	—
	Corporate Notes and Bonds			194,463		—		194,463			—
	Commercial Paper			8,995		—		8,995			—
	Municipal Notes and Bonds			3,854		—		3,854			—
	U.S. Agency Securities			2,500		—		2,500			—
	Total		$	231,047	$	21,235	$	209,812		$	—
	Cash equivalents		$	21,235	$	21,235	$	—		$	—
	Short-term investments			110,034		—		110,033			—
	Long-term investments			99,778		—		99,778			—
	Total		$	231,047	$	21,235	$	209,812		$	—
			Jun-14		Gross		Gross			Jun-14
			Amortized Cost		Unrealized		Unrealized			Estimated FMV
					Gain		Loss
	Corporate Notes and Bonds		$	194,389	$	74	$	—		$	194,463
	Commercial Paper			8,993		2		—			8,995
	Municipal Notes and Bonds			3,849		5		—			3,854
	U.S. Agency Securities			2,500		—		—			2,500
	Total Available-for-sale investments		$	209,731	$	81	$	—		$	209,812
	Cash equivalents										21,235
	Total Aggregate Fair Value									$	231,047
	The fair values of money market funds were derived from quoted market prices as active markets for these instruments exist. The fair values of corporate notes and bonds, commercial paper, municipal notes and bonds and U.S. Agency Securities were derived from non-binding market consensus prices that are corroborated by observable market data.
	There were no transfers of assets measured at fair value between Level 1 and Level 2 during the three months ended June 29, 2014.
	March 2014:
	Assets measured at fair value on a recurring basis were presented in the Company’s consolidated balance sheet as of March 30, 2014.
			March 2014		Quoted Prices		Significant			Significant
			Balance		in Active		Other			Other
					Markets for		Observable			Unobservable
					Identical		Inputs			Inputs
					Assets Level 1		Level 2			Level 3
			(in thousands)
	Money Market Funds		$	10,657	$	10,657	$	—		$	—
	Corporate Notes and Bonds			204,683		—		204,683			—
	Municipal Notes and Bonds			3,895		—		3,895			—
	Commercial Paper			8,988		—		8,988			—
	U.S. Agency Securities			2,496		—		2,496			—
	Total		$	230,719	$	10,657	$	220,062		$	—
	Cash equivalents		$	10,657	$	10,657	$	—		$	—
	Short-term investments			91,307		—		91,307			—
	Long-term investments			128,755		—		128,755			—
	Total		$	230,719	$	10,657	$	220,062		$	—
			Mar-14		Gross		Gross			Mar-14
			Amortized Cost		Unrealized		Unrealized			Estimated FMV
					Gain		Loss
			(in thousands)
	Corporate Notes and Bonds		$	204,747	$	—	$	(64	)	$	204,683
Municipal Notes and Bonds			3,888		7		—			3,895
Commercial Paper			8,986		2		—			8,988
U.S. Agency Securities			2,500		—		(4	)		2,496
Total Available-for-sale investments		$	220,121	$	9	$	(68	)	$	220,062
Cash equivalents										10,657
Total Aggregate Fair Value									$	230,719
There were no transfers of assets measured at fair value between Level 1 and Level 2 during Fiscal 2014.

Balance_Sheet_Details

Balance Sheet Details	3 Months Ended
	Jun. 29, 2014
Organization Consolidation And Presentation Of Financial Statements [Abstract]	'
Balance Sheet Details	'
	3. Balance Sheet Details
	Inventories
	Inventories at June 2014 and March 2014 consist of the following:
		June 2014			March 2014
		(in thousands)
	Work in progress	$	64,211		$	58,641
	Finished goods		13,302			14,391
	Total Inventories	$	77,513		$	73,032
	Prepaid Expenses and Other Current Assets
	Prepaid expenses and other current assets at June 2014 and March 2014 consist of the following:
		June 2014			March 2014
		(in thousands)
	Prepaid expenses	$	3,325		$	3,495
	Tax receivable		7,078			5,932
	Other receivables		2,500			5,356
	Deferred tax assets		2,439			2,487
	Advance to vendors		719			1,026
	Other current assets		1,712			1,291
	Total prepaid expenses and other current assets	$	17,773		$	19,587
	Property and Equipment
	Property and equipment at June 2014 and March 2014 consist of the following:
		June 2014			March 2014
		(in thousands)
	Production and lab equipment	$	28,479		$	25,890
	Computer equipment and software		4,714			4,335
	Equipment under construction		7,383			2,298
	Leasehold improvements and furniture and fixtures		4,315			3,918
	Subtotal		44,891			36,441
	Accumulated depreciation		(13,105	)		(11,202	)
	Property and equipment—net	$	31,786		$	25,239
	Depreciation expense for the three months ended June 29, 2014 and June 30, 2013 was $1.8 million and $0.7 million, respectively. Equipment under construction consists primarily of production and lab equipment. Equipment under construction is not subject to depreciation until it is available for its intended use. All of the equipment under construction is expected to be completed and placed in service by the end of fiscal 2015.
	Accrued Liabilities
	Accrued liabilities at June 2014 and March 2014 consist of the following:
		June 2014			March 2014
		(in thousands)
	Payroll-related expenses	$	4,612		$	4,207
	Bonuses		1,645			3,019
	Legal fees		1,622			2,527
	Accrued contractual coupon interest payable on convertible senior notes		492			1,158
	Deferred revenue		1,000			800
	Income tax payable		130			117
	Other accrued liabilities		4,062			3,157
	Total accrued liabilities	$	13,563		$	14,985

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Jun. 29, 2014
Commitments And Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	4	Commitments and Contingencies
	Operating Lease Obligations
	The Company has non-cancelable operating leases for its facilities through fiscal year 2020.
	Future minimum lease payments under operating leases as of June 2014 are as follows:
	Fiscal Years Ending:		Amount
			(in thousands)
	2015 (remainder)		$	2,931
	2016			4,854
	2017			4,952
	2018			4,834
	2019			4,922
	Beyond			5,143
	Total		$	27,636
	The Company’s lease agreements provide for rental payments which have certain lease incentives and graduated rental payments. As a result, the rent expense is recognized on a straight-line basis over the term of the lease. The Company’s rental expense under operating leases was approximately $1.1 million and $0.6 million for the three months ended June 29, 2014 and June 30, 2013, respectively.
	Legal Proceedings
	From time to time the Company is involved in litigation that the Company believes is of the type common to companies engaged in our line of business, including intellectual property and employment issues. Regardless of the merit or resolution of any such litigation, complex intellectual property litigation is generally costly and can divert the efforts and attention of our management and technical personnel.

Convertible_Senior_Notes

Convertible Senior Notes	3 Months Ended
	Jun. 29, 2014
Debt Disclosure [Abstract]	'
Convertible Senior Notes	'
	5. Convertible Senior Notes
	In November 2013, the Company issued $175.0 million aggregate principal amount of 1.75% Convertible Senior Notes due on November 1, 2018 (the “Notes”), in a private placement to qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933 (the “Securities Act”). The Notes offered have not been registered under the Securities Act, or applicable state securities laws or blue sky laws, and may not be offered or sold in the United States absent registration under the Securities Act and applicable state securities laws or available exemptions from the registration requirements.
	The Notes are senior unsecured obligation of the Company and rank equally in right of payment with all of the Company’s existing and future senior unsecured indebtedness and are junior to any of the Company’s existing and future secured indebtedness. The Notes pay interest in cash semi-annually (May and November) at a rate of 1.75% per annum. Net proceeds received by the Company, after issuance costs, were approximately $169.8 million.
	On or after August 1, 2018 until the maturity date, the Notes may be converted at the option of the holders. Holders may convert the Notes at their option prior to August 1, 2018 only under the following circumstances:
	1) During any calendar quarter commencing after the calendar quarter ending on March 31, 2014 (and only during such calendar quarter), if the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day;
	2) During the five business day period after any five consecutive trading day period in which the “trading price” per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of our common stock and the conversion rate on each such trading day; or
	3) Upon the occurrence of specified corporate events, including if there is a fundamental change.
	Upon conversion, the Company will pay cash up to the aggregate principal amount of the notes to be converted and pay or deliver cash, shares of its own common stock or a combination of cash and shares of its own common stock, at the Company’s election, in respect of the remainder, if any, of its conversion obligation in excess of the aggregate principal amount of the notes being converted.
	The conversion rate is initially 45.683 shares per $1,000 principal amount of the Notes (equivalent to an initial conversion price of approximately $21.89 per share of common stock), subject to certain adjustments.
	The Notes are not redeemable by the Company prior to the maturity date. At the event of default or fundamental change, the principal amount of the notes plus accrued and unpaid interest may become due immediately at the Note holders’ option.
	The Company used and plans to use the net proceeds of approximately $169.3 million from the offering of the Notes (after the issuance costs) for general corporate purposes, including to replace cash used to purchase the MEMS Microphone business line of Analog Devices, Inc. (see Note 8), for the cost of the Note hedge transactions (see below) and for capital expenditures and working capital. However, the Company has not designated with certainty all of the particular uses for the net proceeds from the Notes.
	The Company separately accounts for the liability and equity components of the Notes. The initial debt component of the Notes was valued at $135.7 million based on the contractual cash flows discounted at an appropriate comparable market non-convertible debt borrowing rate at the date of issuance of 7.3%, with the equity component representing the residual amount of the proceeds of $39.3 million which was recorded as a debt discount. The issuance costs were allocated pro-rata based on the relative initial carrying amounts of the debt and equity components, including the Note hedges and warrants transactions described below. As a result, $2.5 million of the issuance costs was allocated to the equity component of the Notes, $3.0 million of issuance costs paid to the initial purchaser was accounted for as a debt discount and $0.25 million of the issuance costs was classified as other non-current assets. The debt discount and the issuance costs allocated to the debt component are amortized as additional interest expense over the term of the Notes using the effective interest method. As of June 29, 2014 the remaining amortization period of the debt discount and the issuance costs is 4.3 years. The effective interest rate of the Notes is 7.84% per annum (1.75% coupon rate plus 6.09% of non-cash accretion expense).
	Convertible Notes Hedges and Warrants
	Concurrent with the issuance of the Notes on November 6 and 7, 2013, the Company purchased call options for its own common stock to hedge the Notes (the “Note Hedge”) and sold call options for its own common stock (the “Warrants”). The Note Hedges and Warrants transactions are structured to reduce the potential future economic dilution associated with the conversion of the Notes and are excluded from the computation of diluted earnings per share for each period presented, as the Company’s average stock price during each period is less than the conversion price.
	The Note Hedges - On November 6 and 7, 2013, the Company purchased call options from a counterparty for an aggregate price of approximately $39.1 million, which gives the Company the right to buy from the counterparty up to approximately 8.0 million shares of the Company’s common stock at a price of $21.89 per share, subject to adjustments. The Note Hedge is exercisable upon conversion of the Note for a number of shares equal to the product of 0.045683 and amount of the converted Note. Upon exercise of the Note Hedge the Company will receive from the counterparty cash, shares of Company’s common stock, or a combination thereof, equal to the amount by which the market price per share of the Company’s common stock exceeds $21.89 during the applicable valuation period. By the Note Hedge terms the Company will receive cash and shares in a combination that offsets share dilution caused by conversion of the Note.
	Warrants - On November 6 and 7, 2013, the Company sold call options to the same counterparty for approximately $25.6 million, which gives the counterparty the right to buy from the Company up to approximately 8.0 million shares of the Company’s common stock at an exercise price of $28.66 per share, subject to adjustments, on a series of days commencing on February 1, 2019 and ending May 13, 2019. Upon exercise of the Warrants, the Company has the option to deliver cash or shares of its common stock equal to the difference between the market price on the exercise date and the strike price of the warrants. Upon exercise of the Warrants the Company will pay to the Initial Purchaser cash, shares of Company’s common stock, or a combination thereof (at the Company’s choice), equal to the amount by which the market price per share of the Company’s common stock exceeds $28.66 during the applicable valuation period.
	The Note Hedges and Warrants above are classified in stockholders’ equity in the Company’s consolidated balance sheets.
	The following table summarizes the principal amounts and related unamortized discount on the Notes (in thousands):
		June 2014
	Principal amount of the Notes	$	175,000
	Unamortized discount on the Notes		37,613
	Net carrying value	$	137,387
	The following table presents the amount of interest expense recognized related to the Notes for the three months ended June 29, 2014 (in thousands):
		Amount
	Contractual coupon interest expense	$	768
	Accretion of debt discount		1,804
	Amortization of debt issuance costs		12
	Total interest expense related to the Notes	$	2,584
	As of June 29, 2014, our aggregate future principal debt maturities are as follows (in thousands):
	Fiscal Year	Amount
	2015 – 2018	$	—
	2019		175,000
	Total	$	175,000
	The convertible notes issued by the Company in November 2013 are shown in the accompanying consolidated balance sheets at their original issuance value, net of unamortized discount, and are not marked to market each period. The approximate fair value of the convertible notes as of June 29, 2014 was $211.5 million. The fair value of the convertible notes was determined using quoted market prices for similar securities, which, due to limited trading activity, are considered Level 2 in the fair value hierarchy.

Stockholders_Equity

Stockholders' Equity	3 Months Ended
	Jun. 29, 2014
Equity [Abstract]	'
Stockholders' Equity	'
	6. Stockholders’ Equity
	Stock Plans
	In July 2011, the Company’s Board of Directors and its stockholders approved the establishment of the 2011 Stock Incentive Plan (the “2011 Plan”). The 2011 Plan provides for annual increases in the number of shares available for issuance there under on the first business day of each fiscal year, beginning with the Company’s fiscal year following the year of this offering, equal to four percent (4%) of the number of shares of the Company’s common stock outstanding as of such date, which resulted in an annual increase of 3.4 million shares for fiscal year 2014.
	Under the Company’s 2004 Stock Incentive Plan and 2011 Stock Incentive Plan (the “Plans”), the Board of Directors may grant either incentive stock options, nonqualified stock options, or stock awards to eligible persons, including employees, nonemployees, members of the Board of Directors, consultants and other independent advisors who provide services to the Company. As of June 30, 2013, the Company has reserved for issuance under the Plans a total of 22.9 million shares (including additional shares subject to automatic increase provisions under the 2011 Plan).
	Incentive stock options may only be granted to employees and at an exercise price of no less than fair value on the date of grant. Nonqualified stock options may be granted at an exercise price of no less than 100% of fair value on the date of grant. For owners of more than 10% of the Company’s common stock, options may only be granted for an exercise price of not less than 110% of fair value, and these options generally expire 10 years from the date of grant. Stock options may be exercisable immediately but subject to repurchase. Stock options vest over the period determined by the Board of Directors, generally four years.
	Stock option activities of the Company under the Plans are as follows (in thousands, except per share amounts):
		Options			Options			Weighted-		Weighted-		Aggregate
		Available			Issued and			Average		Average		Intrinsic
		for Grant			Outstanding			Exercise		Remaining		Value
								Price		Contractual
										Term
										(In Years)
	Balance—March 30, 2014		12,595			8,276		$	10.37		7.87	$	102,072
	Increase to stock option pool		3,533
	Options granted (weighted-average fair value of $6.53 per share)		(949	)		949		$	18.01
	Options exercised		—			(198	)	$	5.41
	Options canceled		51			(51	)	$	11.33
	Balance—June 29, 2014		15,230			8,976		$	11.28		7.79	$	95,996
	June 29, 2014
	Vested and expected to vest					7,602		$	10.71		7.62	$	85,729
	Exercisable— June 29, 2014					3,199		$	7.8		6.75	$	45,389
	Additional information regarding options outstanding as of June 2014 and March 2014 is as follows (in thousands except per share amounts):
	Valuation of Stock-Based Awards
	The Company applies the provisions of ASC 718-10 “Compensation—Stock Compensation” which establishes the accounting for stock-based awards based on the fair value of the award measured at grant date. Accordingly, stock-based compensation cost is recognized in the condensed consolidated statements of income as a component of both cost of revenues and operating expenses over the requisite service period. ASC 718-10 requires tax benefits in excess of compensation cost to be reported as a financing cash flow rather than as a reduction of taxes paid. The determination of the fair value of stock-based payment awards on the date of grant using the Black-Scholes option pricing model is affected by the volatilities of a peer group of companies based on industry, stage of life cycle, size and financial leverage, actual and projected employee stock option exercise behaviors, risk-free interest rate and expected dividends. Variables to be determined include expected volatility, estimated term and risk-free interest rate.
	The aggregate intrinsic value of the stock options exercised during the three months ended June 29, 2014 and June 30, 2013 was $3.0 million and $11.5 million respectively. The aggregate intrinsic value was calculated as the difference between the exercise price of the stock options and the estimated fair market value of the underlying common stock at the date of exercise.
	The number of options expected to vest takes into account an estimate of expected forfeitures. The remaining unamortized stock-based compensation expense, reduced for estimated forfeitures and related to non-vested options, was $17.1 million, and $18.6 million at June 2014 and June 2013 respectively, and, for both periods will be amortized over a weighted-average remaining period of approximately 2.53 and 3.2 years, respectively. Total unrecognized expense will be adjusted for future changes in estimated forfeitures.
	Weighted-Average Assumptions
	Expected Term
	Prior to the third quarter of fiscal year 2013, the Company use the simplified method described in Staff Accounting Bulletin Topic 14, Share-Based Payment, to estimate expected term. Beginning the third quarter of fiscal year 2013, the Company used historical experience to estimate expected term as it believes it had accumulated enough historical data on which to base this estimate. The change to historical data did not result in a significant change in the expected term used in the Black-Sholes computation.
	Expected Volatility
	The Company estimates volatility for option grants by evaluating the average historical volatility of peer group companies for the period immediately preceding the option grant for a term that is approximately equal to the option’s expected term and by evaluating the average historical volatility of the Company’s common stock since the Company’s initial public offering in November 2011.
	Risk-Free Interest Rate
	The Company bases the risk-free interest rate that it uses in the Black-Scholes option pricing model on U.S. Treasury zero-coupon issues with remaining terms similar to the expected term on the options.
	Expected Dividend
	The Company does not anticipate paying any cash dividends in the foreseeable future and, therefore, uses an expected dividend yield of zero in the Black-Scholes option pricing model.
	The Company used the following weighted-average assumptions in determining stock-based compensation expense for options granted in the three months ended June 29, 2014 and June 30, 2013.
		Three Months Ended
		June 29,			June 30,
		2014			2013
	Expected Term		4.46 years			4.67 years
	Volatility		41.9	%		41.4	%
	Risk-free interest rate		1.42	%		0.73	%
	Dividend yield		0	%		0	%
	Restricted Stock Units and Restricted Stock
	Restricted stock unit and restricted stock activity of the Company under the Plans are as follows (in thousands, except per share amounts):
	Restricted stock unit and restricted stock activity	Shares			Weighted average
					grant date
					fair value per share
		(in thousands)
	Unvested at March 30, 2014		3,325		$	16.63
	Granted		440			18.61
	Vested		(210	)		12.72
	Forfeited		(37	)		17.26
	Unvested at June 29, 2014		3,518		$	17.1
	Restricted stock units and restricted stock granted to employees are generally subject to the employee’s continued service to the Company over that period. The fair value of restricted stock units and restricted stock is determined using the fair value of the Company’s common stock on the date of the grant. Compensation expense is generally recognized on a straight-line basis over the requisite service period of each grant adjusted for estimated forfeitures. At June 2014, there was approximately $37.4 million of total unrecognized compensation cost related to restricted stock units and restricted stock, which the Company expects to recognize over a weighted-average period of 3.13 years. The weighted-average grant-date fair value per share of restricted stock units and restricted stock awarded in the three months ended June 2014 was $18.61. The weighted-average grant-date fair value per share of restricted stock units and restricted stock awarded in the three months ended June 2013 was $12.77.
	Common Stock
	As of June 2014 and March 2014, common stock reserved for future issuance was as follows (in thousands):
		Number of Shares
	Common stock reserved for issuance	June 2014			March 2014
	Stock Plans:
	Outstanding stock options		8,976			8,276
	Outstanding restricted stock units and restricted stock		3,518			3,325
	Reserved for future equity incentive grants		11,939			9,697
		24,433			21,298
Purchase Plan		339			400
Warrants to purchase common stock		8,000			7,995
Total common stock reserved for future issuances		32,772			29,693
2013 Employee Stock Purchase Plan
Under the 2013 Employee Stock Purchase Plan, effective September 13, 2013, (the “Purchase Plan”), eligible employees may apply accumulated payroll deductions, which may not exceed 10% of an employee’s compensation, to the purchase of shares of the Company’s common stock at periodic intervals. The purchase price of stock under the Purchase Plan is equal to 85% of the lower of (i) the fair market value of the Company’s common stock on the first day of each offering period, or (ii) the fair market value of the Company’s common stock on the purchase date (as defined in the Purchase Plan). Each offering period consists of one purchase period of approximately six months duration.
An aggregate of 400,000 shares of common stock were reserved for issuance to employees under the Purchase Plan. As of June 29, 2014, 61,000 shares had been purchased.
Stock-Based Compensation Expense
Total employee stock-based compensation cost for the Company’s stock plans for the three months ended June 29, 2014 and June 30, 2013 is as follows:
	Three Months Ended
	June 29,			June 30,
	2014			2013
	(in thousands)
Cost of revenue	$	657		$	237
Research and development		3,518			1,072
Selling, general and administrative		3,460			1,509
Total stock-based compensation expense	$	7,635		$	2,818

Income_Taxes

Income Taxes	3 Months Ended
	Jun. 29, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	7. Income Taxes
	In the three months ended June 29, 2014 and June 30, 2013, the Company recorded an income tax provision of $0.3 million and $1.8 million respectively. The Company’s estimated 2015 effective tax rate differs from the U.S. statutory rate primarily due to profits earned in jurisdictions where the tax rate is lower than the U.S. tax rate partially offset by the unfavorable effects of non-deductible stock-based compensation expense.
	The Company files U.S. federal income tax returns as well as income tax returns in California, Massachusetts and various foreign jurisdictions. The Company has not provided for U.S. federal income and foreign withholding taxes on undistributed earnings from non-U.S. operations as of June 2014 because such earnings are to be reinvested indefinitely.
	The Company’s tax years from 2003 and onwards could be subject to examinations by tax authorities in one or more tax jurisdictions. The Company has recorded $9.8 million of uncertain tax positions within “Long-term liabilities” on the condensed consolidated balance sheet as at June 2014. The Company does not expect any significant increases or decreases to its unrecognized tax benefits within the next twelve months. While management believes that the Company has adequately provided for all tax positions, amounts asserted by tax authorities could be greater or less than the recorded position. Accordingly, the Company’s provisions on federal, state and foreign tax-related matters to be recorded in the future may change as revised estimates are made or the underlying matters are settled or otherwise resolved. In addition, the Company has been recently notified by the IRS that it will be under audit for the following fiscal periods: fiscal year 2011, fiscal year 2012, and fiscal year 2013.

Acquisition

Acquisition	3 Months Ended
	Jun. 29, 2014
Business Combinations [Abstract]	'
Acquisition	'
	8. Acquisition
	On October 14, 2013, the Company entered into a definitive Master Asset Purchase and Sale Agreement with Analog Devices, Inc. (“ADI”). The transaction closed on October 31, 2013. The Company acquired certain assets relating to ADI’s MEMS microphone business for a purchase price of $100 million in cash, of which the Company is entitled to certain contingent future expense reimbursements of approximately $2.2 million. The Company also agreed to a contingent cash payment of up to $70.0 million payable upon the achievement of certain revenue performance targets within one year of the transaction close date. Due to a low probability of achieving the revenue targets, the fair value of the contingent consideration is estimated to be zero in the purchase price allocation described below. ADI licensed certain technology related to the MEMS microphone business to the Company on a royalty-free, worldwide basis, and provides certain transition services to the Company following the closing.
	The acquisition has been accounted for using the acquisition method of accounting in accordance with Accounting Standards Codification (“ASC”) 805 - Business Combinations. Under the acquisition method of accounting, the total purchase consideration of the acquisition is allocated to the tangible assets and identifiable intangible assets and liabilities assumed based on their relative fair values. The excess of the purchase consideration over the net tangible and identifiable intangible assets is recorded as goodwill, and was derived from expected benefits from future technology development, synergies and the knowledgeable and experienced workforce who joined the Company after the acquisition. The Company incurred $2.1 million of acquisition related costs in fiscal 2014.
	The strategic rationale for the acquisition was to accelerate the Company’s audio roadmap and complement its current MEMS System on Chip product offerings at existing mobile, gaming and wearable device customers, while gaining entry into new markets. The acquisition expands the Company’s patent portfolio and existing tier one customer base, which includes major OEM brands worldwide.
	The purchase price allocation is based on estimates, assumptions, third party valuations and other studies of the value of the acquired assets.
	The following table summarizes the purchase price of the assets acquired and the liabilities assumed as of June 29, 2014, the completion of the acquisition.
		Total Amount
	Assets Acquired	(in thousands)
	Inventories	$	5,107
	Property and equipment, net		4,339
	Intangible assets:
	Developed Technology		28,520
	In-Process Research & Development		7,330
	Customer Relationships		1,560
	Goodwill		50,952
	Total assets acquired		97,808
	Total purchase price (net of $2.2 million of contingent expense reimbursements)	$	97,808
	The fair value of intangible assets of $37.4 million has been allocated to the following three asset categories: 1) developed technology, 2) in-process research & development and 3) customer relationships. Developed technology and customer relationships are amortized on a straight line basis over the estimated useful life of the assets.
	The following table represents the estimated useful lives of developed technology and customer relationships:
		Fair Value		Estimated
		Amount		Useful Life
		(in thousands)		(in years)
	Developed Technology	$	28,520		6
	Customer Relationships	$	1,560		7
	The fair values of the identifiable intangible assets: developed technology, in-process research & development and customer relationships were determined using the following methodologies:
	Developed Technology: The value assigned to the acquired developed technology was determined using the multi-period excess earnings method. The fair value of developed technology was capitalized as of the acquisition date and will be amortized using a straight-line method to cost of revenues over the estimated remaining life of six years.
	In-Process Research & Development: The value assigned to the acquired in-process research and development was determined using the multi-period excess earnings method. The fair value of in-process research & development was capitalized as of the acquisition date. In-process research and development capitalized at acquisition is not amortized, and is assessed for impairment on a fair value basis each fiscal quarter until the point at which the project is completed or terminates. If successfully completed, acquired in-process research and development will be amortized over its expected useful life.
	Customer Relationships: An intangible customer relationship asset was recognized to the extent that the Company was expected to benefit from future revenues reasonably anticipated given the history and operating practices of Microphone Product Line. The value assigned to customer relationships was determined using the incremental cash flow method. The fair value of customer relationships was capitalized as of the acquisition date and will be amortized using a straight-line method to sales and marketing expenses over the estimated remaining life of seven years.
	The amounts of revenue and earnings of the Microphone Product Line since the acquisition date included in the consolidated statements of operations for the current reporting periods have not been presented because the impact was not material to the Company’s consolidated results of operations.

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	3 Months Ended
	Jun. 29, 2014
Goodwill And Intangible Assets Disclosure [Abstract]	'
Goodwill and Intangible Assets	'
	9. Goodwill and Intangible Assets
	There were no changes in the carrying amount of goodwill since October 31, 2013, the closing date of the MEMS microphone business acquisition except for a decrease of $0.1 million due to an adjustment in the fourth quarter of fiscal year 2014 to preliminary purchase price allocation of the acquired business. The adjustment was made to account for a $0.1 million increase to fixed assets, based on the fair market value of an asset. This adjustment resulted in a $0.1 million decrease in the fair value assigned to goodwill. Intangible assets subject to amortization consist primarily of developed technology and customer relationships and are reported net of accumulated amortization. Developed technology and customer relationships are amortized on a straight line basis over the estimated useful life of the assets. In-process research and development is assessed for impairment until the development is completed and products are available for sale. The Company expects to complete the in-process research and development projects at various dates during fiscal year 2015 at which time amortization will commence.
	Amortization for acquired intangible assets for the three months ended June 29, 2014 was approximately $1.2 million. The following table represents intangible assets and accumulated amortization:
		Jun-14
		(in thousands)
		Gross		Accumulated		Net
				Amortization
	Developed Technology	$	28,520	$	3,168	$	25,352
	Customer Relationships		1,560		149		1,411
	Total intangible assets subject to amortization	$	30,080	$	3,317	$	26,763
	The estimated future amortization expense related to intangible assets at June 29, 2014, is as follows:
	Fiscal Year	Estimated
		Amortization
		(in thousands)
	2015 (remaining 9 months)	$	3,732
	2016		4,976
	2017		4,976
	2018		4,976
	2019		4,976
	Thereafter		3,127
	Total	$	26,763

Subsequent_Events

Subsequent Events	3 Months Ended
	Jun. 29, 2014
Subsequent Events [Abstract]	'
Subsequent Events	'
	10. Subsequent Events
	On July 7, 2014, the Company entered into a Share Purchase Agreement with Trusted Positioning, Inc., a Canadian corporation (“TPI”) and the shareholders of TPI pursuant to which the Company has agreed to acquire all the outstanding share capital of TPI in exchange for (A) shares of the Company’s common stock with an aggregate value of $6 million, (B) $13 million in cash at closing, (C) $12 million in cash, which will be contingent upon the achievement of certain milestones, and (D) cash for any resulting fractional shares. The Company also agreed to grant restricted stock awards and/or options to purchase shares of Company Stock (each a “TPI Equity Award”) to certain TPI employees with an aggregate value of $5 million at closing.
	The maximum amount payable for TPI will be approximately $36 million, including the maximum contingent cash payments and all of the shares of Company common stock issued at closing subject to the TPI Equity Awards and further subject to post-closing purchase price adjustments.
	Further, On July 7, 2014, InvenSense International, Inc., a company formed under the laws of the Cayman Islands, and a wholly-owned subsidiary of the Company (the “Subsidiary”), entered into a Share Purchase Agreement with certain members of management of Movea SA, a company formed under the laws of France (“Movea”), and shareholders representing at least 95% of the outstanding capital stock of Movea, pursuant to which the Subsidiary has agreed to acquire at least 95% of the outstanding shares of Movea, with the remaining 5% purchased pursuant to a separate purchase agreement, in exchange for an aggregate of up to (A) $61.5 million in cash at closing and (B) $13 million in cash, which will be contingent upon the achievement of certain milestones, and further subject to post-closing purchase price adjustments.
	In addition, the Company has agreed to grant restricted stock units for shares of the Company common stock (each a “Movea Equity Award”) to certain Movea employees, having an aggregate value of $3 million and bonuses of up to $600,000.
	The maximum amount payable for Movea will be up to approximately $78 million, including the maximum contingent cash payments, payments for the purchase of all outstanding stock, the Movea Equity Awards and the bonus amount. This transaction closed on July 22, 2014.

Organization_and_Summary_of_Si1

Organization and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Jun. 29, 2014
Accounting Policies [Abstract]	'
Business	'
	Business
	InvenSense, Inc. (“the Company”) was incorporated in California in June 2003 and reincorporated in Delaware in January 2004. The Company designs, develops, markets and sells Micro-Electro-Mechanical Systems (“MEMS”) sensors, such as accelerometers, gyroscopes and microphones for consumer electronics, and is dedicated to bringing the best-in-class size, performance and cost solutions to market. Targeting applications in smartphones and tablets, console and portable video gaming devices, digital still and video cameras, smart TVs (including digital set-top boxes, televisions and multi-media HDDs), navigation devices, toys, and health and fitness accessories, the Company delivers leading solutions based on its advanced multi-axis technology.
	These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes thereto for the fiscal year ended March 30, 2014 included in the Company’s Annual Report on Form 10-K filed on May 29, 2014 with the Securities and Exchange Commission (“SEC”). No material changes have been made to the Company’s significant accounting policies since the Company’s Annual Report on Form 10-K for the fiscal year ended March 30, 2014.
Certain Significant Business Risks and Uncertainties	'
	Certain Significant Business Risks and Uncertainties
	The Company participates in the high-technology industry and believes that adverse changes in any of the following areas could have a material effect on the Company’s future financial position, results of operations, or cash flows: reliance on a limited number of primary customers to support the Company’s revenue generating activities; advances and trends in new technologies and industry standards; market acceptance of the Company’s products; development of sales channels; strategic relationships, including key component suppliers; litigation or claims against the Company based on intellectual property, patent, product, regulatory, or other factors; and the Company’s ability to attract and retain employees necessary to support its growth.
Basis of Consolidation	'
	Basis of Consolidation
	The consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles, or GAAP, and include our accounts and the accounts of our wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. The functional currency of each of the Company’s subsidiaries is the U.S. dollar. Foreign currency gains or losses are recorded as other income (expense), net, in the consolidated statements of income.
Fiscal Year	'
	Fiscal Year
	The Company’s fiscal year is a 52 or 53 week period ending on the Sunday closest to March 31. The Company’s most recent fiscal year (“Fiscal 2014”) ended on March 30, 2014 (“March 2014”). The first fiscal quarter in each of the two most recent fiscal years ended on June 29, 2014 (“three months ended June 29, 2014” or “June 2014”) and June 30, 2013 (“three months ended June 30, 2013” or “June 2013”), respectively, and each quarter period included 13 weeks.
Use of Estimates	'
	Use of Estimates
	The preparation of the Company’s Consolidated Financial Statements and related Notes in conformity with accounting principles generally accepted in the United States of America (U.S. GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the Consolidated Financial Statements and related Notes and the reported amounts of income and expenses during the reporting period. Significant estimates included in the Consolidated Financial Statements and related Notes include income taxes, inventory valuation, stock-based compensation, loss contingencies, warranty reserves, valuation of acquired assets, and valuation of convertible senior notes, including the related convertible notes hedges and warrants. These estimates are based upon information available as of the date of the consolidated financial statements, and actual results could differ from those estimates.
Concentration of Credit Risk	'
	Concentration of Credit Risk
	At June 2014, one customer accounted for 47% of total accounts receivable. At June 2013, five customers each accounted for 16%, 14%, 11%, 11% and 10% of total accounts receivable.
	For the three months ended June 29, 2014, three customers each accounted for 30%, 12% and 10% of total net revenue. For the three months ended June 30, 2013, three customers each accounted for 26%, 11% and 11% of total net revenue.
Warranty	'
	Warranty
	The Company’s warranty agreements are contract and component specific and can be up to three years for selected components. The Company’s accrual for anticipated warranty costs has declined primarily due to a decline in the historical volume of product returned under the warranty program. The accrual also includes management’s judgment regarding anticipated rates of warranty claims and associated repair costs.
Net Income (loss) Per Share	'
	Net Income (loss) Per Share
	Basic net income (loss) per share is computed by dividing net income (loss) by the weighted average number of shares outstanding during the period, which excludes dilutive unvested restricted stock.
	Diluted net income (loss) per share is computed by dividing net income (loss) by the weighted average number of shares outstanding, including unvested restricted stock, certain warrants to purchase common stock and potential dilutive shares from the dilutive effect of outstanding stock options using the treasury stock method.
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements
	In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606). ASU No. 2014-09 provides guidance that companies will recognize revenue to depict the transfer of goods or services to customers in amounts that reflect the payment to which a company expects to be entitled in exchange for those goods or services. The Company will be required to implement the new revenue recognition standard for the first quarter of fiscal year 2018. The Company is currently evaluating the impact on its consolidated financial statements.
Fair Value Measurements	'
	The Company applies the provisions of ASC 820-10, “Fair Value Measurements”. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (i.e., the “exit price”) in an orderly transaction between market participants at the measurement date. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. ASC 820-10 requires disclosure that establishes a framework for measuring fair value and expands disclosure about fair value measurements. The standard describes a fair value hierarchy based on three levels of inputs that may be used to measure fair value. The inputs for the first two levels are considered observable and the last is unobservable and include the following:
	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 inputs which are observable, either directly or indirectly, for substantially the full term of the asset or liability; or
	Level 3—Unobservable inputs in which there is little or no market data, and as a result, prices or valuation techniques are employed that require inputs that are significant to the fair value measurement.

Organization_and_Summary_of_Si2

Organization and Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Jun. 29, 2014
Accounting Policies [Abstract]	'
Summary of Activity Related to Product Warranty Liability	'
	The following table summarizes the activity related to product warranty liability during the three months ended June 29, 2014 and June 30, 2013:
		Three Months Ended
		June 29, 2014			June 30, 2013
		(in thousands)
	Beginning balance	$	80		$	123
	Provision for warranty		53			115
	Accruals related to changes in estimate		(45	)		(94	)
	Less: actual warranty costs		(13	)		(8	)
	Ending balance	$	75		$	136
Calculation of Basic and Diluted Net Income (Loss) Per Share	'
	The following table presents the calculation of basic and diluted net income (loss) per share:
		Three Months Ended
		June 29, 2014			June 30, 2013
		(in thousands, except per share data)
	Numerator:
	Basic and Diluted:
	Net income (loss)	$	(4,832	)	$	10,322
	Denominator:
	Basic shares:
	Weighted average shares used in computing basic net income (loss) per share		88,302			85,038
	Diluted shares:
	Weighted average shares used in computing basic net income (loss) per share		88,302			85,038
	Effect of potentially dilutive securities:
	Stock options and unvested restricted stock		—			2,797
	Common stock warrants		—			79
	Weighted average shares used in computing diluted net income (loss)per share		88,302			87,914
	Net income (loss) per share:
	Basic	$	(0.05	)	$	0.12
	Diluted	$	(0.05	)	$	0.12
Securities Excluded from Computation of Diluted Net Income (Loss) Per Common Share	'
	The following summarizes the potentially dilutive securities outstanding at the end of each period that were excluded from the computation of diluted net income (loss) per share for the periods presented as their effect would have been antidilutive:
		Three Months Ended
		June 29, 2014			June 30, 2013
		(in thousands)
	Employee stock options		8,606			4,906
	Unvested restricted stock units and others		3,414			770
	Total antidilutive securities		12,020			5,676

Cash_Equivalents_and_Available1

Cash Equivalents and Available-for-sale Investments (Tables)	3 Months Ended
	Jun. 29, 2014
Cash And Cash Equivalents [Abstract]	'
Assets Measured at Fair Value on Recurring Basis	'
	Assets measured at fair value on a recurring basis were presented in the Company’s condensed consolidated balance sheet as of June 29, 2014.
		June 2014		Quoted Prices		Significant			Significant
		Balance		in Active		Other			Other
				Markets for		Observable			Unobservable
				Identical		Inputs			Inputs
				Assets Level 1		Level 2			Level 3
		(in thousands)
	Money Market Funds	$	21,235	$	21,235	$	—		$	—
	Corporate Notes and Bonds		194,463		—		194,463			—
	Commercial Paper		8,995		—		8,995			—
	Municipal Notes and Bonds		3,854		—		3,854			—
	U.S. Agency Securities		2,500		—		2,500			—
	Total	$	231,047	$	21,235	$	209,812		$	—
	Cash equivalents	$	21,235	$	21,235	$	—		$	—
	Short-term investments		110,034		—		110,033			—
	Long-term investments		99,778		—		99,778			—
	Total	$	231,047	$	21,235	$	209,812		$	—
		Jun-14		Gross		Gross			Jun-14
		Amortized Cost		Unrealized		Unrealized			Estimated FMV
				Gain		Loss
	Corporate Notes and Bonds	$	194,389	$	74	$	—		$	194,463
	Commercial Paper		8,993		2		—			8,995
	Municipal Notes and Bonds		3,849		5		—			3,854
	U.S. Agency Securities		2,500		—		—			2,500
	Total Available-for-sale investments	$	209,731	$	81	$	—		$	209,812
	Cash equivalents									21,235
	Total Aggregate Fair Value								$	231,047
	The fair values of money market funds were derived from quoted market prices as active markets for these instruments exist. The fair values of corporate notes and bonds, commercial paper, municipal notes and bonds and U.S. Agency Securities were derived from non-binding market consensus prices that are corroborated by observable market data.
	There were no transfers of assets measured at fair value between Level 1 and Level 2 during the three months ended June 29, 2014.
	March 2014:
	Assets measured at fair value on a recurring basis were presented in the Company’s consolidated balance sheet as of March 30, 2014.
		March 2014		Quoted Prices		Significant			Significant
		Balance		in Active		Other			Other
				Markets for		Observable			Unobservable
				Identical		Inputs			Inputs
				Assets Level 1		Level 2			Level 3
		(in thousands)
	Money Market Funds	$	10,657	$	10,657	$	—		$	—
	Corporate Notes and Bonds		204,683		—		204,683			—
	Municipal Notes and Bonds		3,895		—		3,895			—
	Commercial Paper		8,988		—		8,988			—
	U.S. Agency Securities		2,496		—		2,496			—
	Total	$	230,719	$	10,657	$	220,062		$	—
	Cash equivalents	$	10,657	$	10,657	$	—		$	—
	Short-term investments		91,307		—		91,307			—
	Long-term investments		128,755		—		128,755			—
	Total	$	230,719	$	10,657	$	220,062		$	—
		Mar-14		Gross		Gross			Mar-14
		Amortized Cost		Unrealized		Unrealized			Estimated FMV
				Gain		Loss
		(in thousands)
	Corporate Notes and Bonds	$	204,747	$	—	$	(64	)	$	204,683
	Municipal Notes and Bonds		3,888		7		—			3,895
	Commercial Paper		8,986		2		—			8,988
	U.S. Agency Securities		2,500		—		(4	)		2,496
	Total Available-for-sale investments	$	220,121	$	9	$	(68	)	$	220,062
	Cash equivalents									10,657
	Total Aggregate Fair Value								$	230,719

Balance_Sheet_Details_Tables

Balance Sheet Details (Tables)	3 Months Ended
	Jun. 29, 2014
Organization Consolidation And Presentation Of Financial Statements [Abstract]	'
Inventories	'
	Inventories at June 2014 and March 2014 consist of the following:
		June 2014			March 2014
		(in thousands)
	Work in progress	$	64,211		$	58,641
	Finished goods		13,302			14,391
	Total Inventories	$	77,513		$	73,032
Prepaid Expenses and Other Current Assets	'
	Prepaid expenses and other current assets at June 2014 and March 2014 consist of the following:
		June 2014			March 2014
		(in thousands)
	Prepaid expenses	$	3,325		$	3,495
	Tax receivable		7,078			5,932
	Other receivables		2,500			5,356
	Deferred tax assets		2,439			2,487
	Advance to vendors		719			1,026
	Other current assets		1,712			1,291
	Total prepaid expenses and other current assets	$	17,773		$	19,587
Property and Equipment	'
	Property and equipment at June 2014 and March 2014 consist of the following:
		June 2014			March 2014
		(in thousands)
	Production and lab equipment	$	28,479		$	25,890
	Computer equipment and software		4,714			4,335
	Equipment under construction		7,383			2,298
	Leasehold improvements and furniture and fixtures		4,315			3,918
	Subtotal		44,891			36,441
	Accumulated depreciation		(13,105	)		(11,202	)
	Property and equipment—net	$	31,786		$	25,239
Accrued Liabilities	'
	Accrued liabilities at June 2014 and March 2014 consist of the following:
		June 2014			March 2014
		(in thousands)
	Payroll-related expenses	$	4,612		$	4,207
	Bonuses		1,645			3,019
	Legal fees		1,622			2,527
	Accrued contractual coupon interest payable on convertible senior notes		492			1,158
	Deferred revenue		1,000			800
	Income tax payable		130			117
	Other accrued liabilities		4,062			3,157
	Total accrued liabilities	$	13,563		$	14,985

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	3 Months Ended
	Jun. 29, 2014
Commitments And Contingencies Disclosure [Abstract]	'
Future Minimum Lease Payments under Operating Leases	'
	Future minimum lease payments under operating leases as of June 2014 are as follows:
	Fiscal Years Ending:	Amount
		(in thousands)
	2015 (remainder)	$	2,931
	2016		4,854
	2017		4,952
	2018		4,834
	2019		4,922
	Beyond		5,143
	Total	$	27,636

Convertible_Senior_Notes_Table

Convertible Senior Notes (Tables)	3 Months Ended
	Jun. 29, 2014
Debt Disclosure [Abstract]	'
Summary of Principal Amounts and Related Unamortized Discount on Notes	'
	The following table summarizes the principal amounts and related unamortized discount on the Notes (in thousands):
		Jun-14
	Principal amount of the Notes	$	175,000
	Unamortized discount on the Notes		37,613
	Net carrying value	$	137,387
Schedule of Interest Expense Recognized Related to Notes	'
	The following table presents the amount of interest expense recognized related to the Notes for the three months ended June 29, 2014 (in thousands):
		Amount
	Contractual coupon interest expense	$	768
	Accretion of debt discount		1,804
	Amortization of debt issuance costs		12
	Total interest expense related to the Notes	$	2,584
Schedule of Aggregate Future Principal Debt Maturities	'
	As of June 29, 2014, our aggregate future principal debt maturities are as follows (in thousands):
	Fiscal Year	Amount
	2015 – 2018	$	—
	2019		175,000
	Total	$	175,000

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	3 Months Ended
	Jun. 29, 2014
Equity [Abstract]	'
Stock Option Activities	'
	Stock option activities of the Company under the Plans are as follows (in thousands, except per share amounts):
		Options			Options			Weighted-		Weighted-		Aggregate
		Available			Issued and			Average		Average		Intrinsic
		for Grant			Outstanding			Exercise		Remaining		Value
								Price		Contractual
										Term
										(In Years)
	Balance—March 30, 2014		12,595			8,276		$	10.37		7.87	$	102,072
	Increase to stock option pool		3,533
	Options granted (weighted-average fair value of $6.53 per share)		(949	)		949		$	18.01
	Options exercised		—			(198	)	$	5.41
	Options canceled		51			(51	)	$	11.33
	Balance—June 29, 2014		15,230			8,976		$	11.28		7.79	$	95,996
	June 29, 2014
	Vested and expected to vest					7,602		$	10.71		7.62	$	85,729
	Exercisable— June 29, 2014					3,199		$	7.8		6.75	$	45,389
Weighted-Average Assumptions in Determining Stock-Based Compensation Expense Options Granted	'
	The Company used the following weighted-average assumptions in determining stock-based compensation expense for options granted in the three months ended June 29, 2014 and June 30, 2013.
		Three Months Ended
		June 29,			June 30,
		2014			2013
	Expected Term		4.46 years			4.67 years
	Volatility		41.9	%		41.4	%
	Risk-free interest rate		1.42	%		0.73	%
	Dividend yield		0	%		0	%
Restricted Stock Unit and Restricted Stock Activity	'
	Restricted stock unit and restricted stock activity of the Company under the Plans are as follows (in thousands, except per share amounts):
	Restricted stock unit and restricted stock activity	Shares			Weighted average
					grant date
					fair value per share
		(in thousands)
	Unvested at March 30, 2014		3,325		$	16.63
	Granted		440			18.61
	Vested		(210	)		12.72
	Forfeited		(37	)		17.26
	Unvested at June 29, 2014		3,518		$	17.1
Summary of Total Stock-Based Compensation Cost	'
	Total employee stock-based compensation cost for the Company’s stock plans for the three months ended June 29, 2014 and June 30, 2013 is as follows:
		Three Months Ended
		June 29,			June 30,
		2014			2013
		(in thousands)
	Cost of revenue	$	657		$	237
	Research and development		3,518			1,072
	Selling, general and administrative		3,460			1,509
	Total stock-based compensation expense	$	7,635		$	2,818
Common Stock Reserved for Future Issuance	'
	As of June 2014 and March 2014, common stock reserved for future issuance was as follows (in thousands):
		Number of Shares
	Common stock reserved for issuance	June 2014			March 2014
	Stock Plans:
	Outstanding stock options		8,976			8,276
	Outstanding restricted stock units and restricted stock		3,518			3,325
	Reserved for future equity incentive grants		11,939			9,697
			24,433			21,298
	Purchase Plan		339			400
	Warrants to purchase common stock		8,000			7,995
	Total common stock reserved for future issuances		32,772			29,693

Acquisition_Tables

Acquisition (Tables)	3 Months Ended
	Jun. 29, 2014
Business Combinations [Abstract]	'
Summary of Purchase Price of Assets Acquired and Liabilities Assumed	'
	The following table summarizes the purchase price of the assets acquired and the liabilities assumed as of June 29, 2014, the completion of the acquisition.
		Total Amount
	Assets Acquired	(in thousands)
	Inventories	$	5,107
	Property and equipment, net		4,339
	Intangible assets:
	Developed Technology		28,520
	In-Process Research & Development		7,330
	Customer Relationships		1,560
	Goodwill		50,952
	Total assets acquired		97,808
	Total purchase price (net of $2.2 million of contingent expense reimbursements)	$	97,808
Summary of Fair Value and Estimated Useful Lives of Intangible Assets	'
	The following table represents the estimated useful lives of developed technology and customer relationships:
		Fair Value		Estimated
		Amount		Useful Life
		(in thousands)		(in years)
	Developed Technology	$	28,520		6
	Customer Relationships	$	1,560		7

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	3 Months Ended
	Jun. 29, 2014
Goodwill And Intangible Assets Disclosure [Abstract]	'
Summary of Intangible Assets and Accumulated Amortization	'
	The following table represents intangible assets and accumulated amortization:
		Jun-14
		(in thousands)
		Gross		Accumulated		Net
				Amortization
	Developed Technology	$	28,520	$	3,168	$	25,352
	Customer Relationships		1,560		149		1,411
	Total intangible assets subject to amortization	$	30,080	$	3,317	$	26,763
Estimated Future Amortization Expense Related to Intangible Assets	'
	The estimated future amortization expense related to intangible assets at June 29, 2014, is as follows:
	Fiscal Year	Estimated
		Amortization
		(in thousands)
	2015 (remaining 9 months)	$	3,732
	2016		4,976
	2017		4,976
	2018		4,976
	2019		4,976
	Thereafter		3,127
	Total	$	26,763

Organization_and_Summary_of_Si3

Organization and Summary of Significant Accounting Policies - Additional Information (Detail)	3 Months Ended
	Jun. 29, 2014	Jun. 30, 2013
	Customer	Customer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]	'	'
Incorporation month and year	'2003-06	'
Accounts Receivable [Member]	'	'
New Accounting Pronouncements or Change in Accounting Principle [Line Items]	'	'
Number of major customers	1	5
Accounts Receivable [Member] | Customer One [Member]	'	'
New Accounting Pronouncements or Change in Accounting Principle [Line Items]	'	'
Percentage of accounts receivable	47.00%	16.00%
Accounts Receivable [Member] | Customer Two [Member]	'	'
New Accounting Pronouncements or Change in Accounting Principle [Line Items]	'	'
Percentage of accounts receivable	'	14.00%
Accounts Receivable [Member] | Customer Three [Member]	'	'
New Accounting Pronouncements or Change in Accounting Principle [Line Items]	'	'
Percentage of accounts receivable	'	11.00%
Accounts Receivable [Member] | Customer Four [Member]	'	'
New Accounting Pronouncements or Change in Accounting Principle [Line Items]	'	'
Percentage of accounts receivable	'	11.00%
Accounts Receivable [Member] | Customer Five [Member]	'	'
New Accounting Pronouncements or Change in Accounting Principle [Line Items]	'	'
Percentage of accounts receivable	'	10.00%
Net Revenue [Member]	'	'
New Accounting Pronouncements or Change in Accounting Principle [Line Items]	'	'
Number of major customers	3	3
Net Revenue [Member] | Customer One [Member]	'	'
New Accounting Pronouncements or Change in Accounting Principle [Line Items]	'	'
Percentage of net revenue	30.00%	26.00%
Net Revenue [Member] | Customer Two [Member]	'	'
New Accounting Pronouncements or Change in Accounting Principle [Line Items]	'	'
Percentage of net revenue	12.00%	11.00%
Net Revenue [Member] | Customer Three [Member]	'	'
New Accounting Pronouncements or Change in Accounting Principle [Line Items]	'	'
Percentage of net revenue	10.00%	11.00%
Maximum [Member]	'	'
New Accounting Pronouncements or Change in Accounting Principle [Line Items]	'	'
Period of Company's warranty agreements	'3 years	'

Organization_and_Summary_of_Si4

Organization and Summary of Significant Accounting Policies - Summary of Activity Related to Product Warranty Liability (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Jun. 29, 2014	Jun. 30, 2013
Movement In Standard And Extended Product Warranty Increase Decrease [Roll Forward]	'	'
Beginning balance	$80	$123
Provision for warranty	53	115
Accruals related to changes in estimate	-45	-94
Less: actual warranty costs	-13	-8
Ending balance	$75	$136

Organization_and_Summary_of_Si5

Organization and Summary of Significant Accounting Policies - Calculation of Basic and Diluted Net Income (Loss) Per Share (Detail) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 29, 2014	Jun. 30, 2013
Basic and Diluted:	'	'
Net income (loss)	($4,832)	$10,322
Basic shares:	'	'
Weighted average shares used in computing basic net income (loss) per share	88,302	85,038
Diluted shares:	'	'
Weighted average shares used in computing basic net income (loss) per share	88,302	85,038
Effect of potentially dilutive securities:	'	'
Stock options and unvested restricted stock	'	2,797
Common stock warrants	'	79
Weighted average shares used in computing diluted net income (loss) per share	88,302	87,914
Net income (loss) per share:	'	'
Basic	($0.05)	$0.12
Diluted	($0.05)	$0.12

Organization_and_Summary_of_Si6

Organization and Summary of Significant Accounting Policies - Securities Excluded from Computation of Diluted Net Income (Loss) Per Common Share (Detail)	3 Months Ended
In Thousands, unless otherwise specified	Jun. 29, 2014	Jun. 30, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total antidilutive securities	12,020	5,676
Employee Stock Options [Member]	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total antidilutive securities	8,606	4,906
Unvested Restricted Stock Units and Others [Member]	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total antidilutive securities	3,414	770

Cash_Equivalents_and_Available2

Cash Equivalents and Available-for-sale Investments - Additional Information (Detail) (USD $)	Jun. 29, 2014	Mar. 30, 2014	Jun. 30, 2013	Mar. 31, 2013	Mar. 30, 2014	Jun. 29, 2014	Mar. 30, 2014	Jun. 29, 2014	Mar. 30, 2014	Jun. 29, 2014	Mar. 30, 2014
					Money Market Funds [Member]	Minimum [Member]	Minimum [Member]	Maximum [Member]	Maximum [Member]	Foreign Subsidiaries [Member]	Foreign Subsidiaries [Member]
Cash and Cash Equivalents [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Cash	$15,200,000	$15,300,000	'	'	'	'	'	'	'	'	'
Cash equivalents	21,200,000	'	'	'	10,700,000	'	'	'	'	'	'
Cash and cash equivalents	36,426,000	26,025,000	110,224,000	100,843,000	'	'	'	'	'	12,700,000	9,800,000
Short-term investments available-for-sale	110,000,000	91,300,000	'	'	'	'	'	'	'	'	'
Long-term investments available-for-sale	99,800,000	128,800,000	'	'	'	'	'	'	'	'	'
Investments available-for-sale total	209,800,000	220,100,000	'	'	'	'	'	'	'	'	'
Investment maturity period	'	'	'	'	'	'1 Year	'1 Year	'5 Years	'2 Years	'	'
Transfers of assets measured at fair value between Level 1 and Level 2	$0	$0	'	'	'	'	'	'	'	'	'

Cash_Equivalents_and_Available3

Cash Equivalents and Available-for-sale Investments - Assets Measured at Fair Value on Recurring Basis (Detail) (USD $)	Jun. 29, 2014	Mar. 30, 2014
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Estimated FMV	$110,034	$91,307
Fair Value, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	231,047	230,719
Fair value of assets	231,047	230,719
Amortized Cost	209,731	220,121
Gross Unrealized Gain	81	9
Gross Unrealized Loss	'	-68
Estimated FMV	209,812	220,062
Fair Value, Recurring [Member] | Money Market Funds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	21,235	10,657
Fair Value, Recurring [Member] | Corporate Notes and Bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	194,463	204,683
Amortized Cost	194,389	204,747
Gross Unrealized Gain	74	'
Gross Unrealized Loss	'	-64
Estimated FMV	194,463	204,683
Fair Value, Recurring [Member] | Commercial Paper [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	'	8,988
Fair value of assets	8,995	'
Amortized Cost	8,993	8,986
Gross Unrealized Gain	2	2
Gross Unrealized Loss	'	'
Estimated FMV	8,995	8,988
Fair Value, Recurring [Member] | Municipal Notes and Bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	'	3,895
Fair value of assets	3,854	'
Amortized Cost	3,849	3,888
Gross Unrealized Gain	5	7
Gross Unrealized Loss	'	'
Estimated FMV	3,854	3,895
Fair Value, Recurring [Member] | U.S. Agency Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	2,500	2,496
Amortized Cost	2,500	2,500
Gross Unrealized Gain	'	'
Gross Unrealized Loss	'	-4
Estimated FMV	2,500	2,496
Fair Value, Recurring [Member] | Cash equivalents [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	21,235	10,657
Fair Value, Recurring [Member] | Short-term investments [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	110,034	91,307
Fair Value, Recurring [Member] | Long-term investments [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	99,778	128,755
Fair Value, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	21,235	10,657
Fair Value, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | Money Market Funds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	21,235	10,657
Fair Value, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | Corporate Notes and Bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	'	'
Fair Value, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | Commercial Paper [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	'	'
Fair value of assets	'	'
Fair Value, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | Municipal Notes and Bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	'	'
Fair value of assets	'	'
Fair Value, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | U.S. Agency Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	'	'
Fair Value, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | Cash equivalents [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	21,235	10,657
Fair Value, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | Short-term investments [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	'	'
Fair Value, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | Long-term investments [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	'	'
Fair Value, Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	209,812	220,062
Fair Value, Recurring [Member] | Significant Other Observable Inputs Level 2 [Member] | Money Market Funds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	'	'
Fair Value, Recurring [Member] | Significant Other Observable Inputs Level 2 [Member] | Corporate Notes and Bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	194,463	204,683
Fair Value, Recurring [Member] | Significant Other Observable Inputs Level 2 [Member] | Commercial Paper [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	'	8,988
Fair value of assets	8,995	'
Fair Value, Recurring [Member] | Significant Other Observable Inputs Level 2 [Member] | Municipal Notes and Bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	'	3,895
Fair value of assets	3,854	'
Fair Value, Recurring [Member] | Significant Other Observable Inputs Level 2 [Member] | U.S. Agency Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	2,500	2,496
Fair Value, Recurring [Member] | Significant Other Observable Inputs Level 2 [Member] | Cash equivalents [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	'	'
Fair Value, Recurring [Member] | Significant Other Observable Inputs Level 2 [Member] | Short-term investments [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	110,033	91,307
Fair Value, Recurring [Member] | Significant Other Observable Inputs Level 2 [Member] | Long-term investments [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	99,778	128,755
Fair Value, Recurring [Member] | Significant Other Unobservable Inputs Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	'	'
Fair Value, Recurring [Member] | Significant Other Unobservable Inputs Level 3 [Member] | Money Market Funds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	'	'
Fair Value, Recurring [Member] | Significant Other Unobservable Inputs Level 3 [Member] | Corporate Notes and Bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	'	'
Fair Value, Recurring [Member] | Significant Other Unobservable Inputs Level 3 [Member] | Commercial Paper [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	'	'
Fair value of assets	'	'
Fair Value, Recurring [Member] | Significant Other Unobservable Inputs Level 3 [Member] | Municipal Notes and Bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	'	'
Fair value of assets	'	'
Fair Value, Recurring [Member] | Significant Other Unobservable Inputs Level 3 [Member] | U.S. Agency Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	'	'
Fair Value, Recurring [Member] | Significant Other Unobservable Inputs Level 3 [Member] | Cash equivalents [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	'	'
Fair Value, Recurring [Member] | Significant Other Unobservable Inputs Level 3 [Member] | Short-term investments [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	'	'
Fair Value, Recurring [Member] | Significant Other Unobservable Inputs Level 3 [Member] | Long-term investments [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets	'	'

Balance_Sheet_Details_Inventor

Balance Sheet Details - Inventories (Detail) (USD $)	Jun. 29, 2014	Mar. 30, 2014
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]	'	'
Work in progress	$64,211	$58,641
Finished goods	13,302	14,391
Total Inventories	$77,513	$73,032

Balance_Sheet_Details_Prepaid_

Balance Sheet Details - Prepaid Expenses and Other Current Assets (Detail) (USD $)	Jun. 29, 2014	Mar. 30, 2014
In Thousands, unless otherwise specified
Balance Sheet Related Disclosures [Abstract]	'	'
Prepaid expenses	$3,325	$3,495
Tax receivable	7,078	5,932
Other receivables	2,500	5,356
Deferred tax assets	2,439	2,487
Advance to vendors	719	1,026
Other current assets	1,712	1,291
Total prepaid expenses and other current assets	$17,773	$19,587

Balance_Sheet_Details_Property

Balance Sheet Details - Property and Equipment (Detail) (USD $)	Jun. 29, 2014	Mar. 30, 2014
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]	'	'
Subtotal	$44,891	$36,441
Accumulated depreciation	-13,105	-11,202
Property and equipment, net	31,786	25,239
Production and Lab Equipment [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Subtotal	28,479	25,890
Computer Equipment and Software [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Subtotal	4,714	4,335
Equipment Under Construction [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Subtotal	7,383	2,298
Leasehold Improvements and Furniture and Fixtures [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Subtotal	$4,315	$3,918

Balance_Sheet_Details_Addition

Balance Sheet Details - Additional Information (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Jun. 29, 2014	Jun. 30, 2013
Balance Sheet Related Disclosures [Abstract]	'	'
Depreciation expense	$1,747	$675

Balance_Sheet_Details_Accrued_

Balance Sheet Details - Accrued Liabilities (Detail) (USD $)	Jun. 29, 2014	Mar. 30, 2014
In Thousands, unless otherwise specified
Accrued Liabilities [Line Items]	'	'
Payroll-related expenses	$4,612	$4,207
Bonuses	1,645	3,019
Legal fees	1,622	2,527
Deferred revenue	1,000	800
Income tax payable	130	117
Other accrued liabilities	4,062	3,157
Total accrued liabilities	13,563	14,985
Convertible Senior Notes [Member]	'	'
Accrued Liabilities [Line Items]	'	'
Accrued contractual coupon interest payable on convertible senior notes	$492	$1,158

Commitments_and_Contingencies_1

Commitments and Contingencies - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Jun. 29, 2014	Jun. 30, 2013
Commitments And Contingencies Disclosure [Abstract]	'	'
Non-cancelable operating leases terms	'The Company has non-cancelable operating leases for its facilities through fiscal year 2020.	'
Operating leases, expiration date	'2020	'
Rental expense	$1.10	$0.60

Commitments_and_Contingencies_2

Commitments and Contingencies - Future Minimum Lease Payments under Operating Leases (Detail) (USD $)	Jun. 29, 2014
In Thousands, unless otherwise specified
Leases [Abstract]	'
2015 (remainder)	$2,931
2016	4,854
2017	4,952
2018	4,834
2019	4,922
Beyond	5,143
Total	$27,636

Convertible_Senior_Notes_Addit

Convertible Senior Notes - Additional Information (Detail) (USD $)

3 Months Ended

0 Months Ended

0 Months Ended

3 Months Ended

3 Months Ended

Share data in Millions, except Per Share data, unless otherwise specified

Jun. 29, 2014

Nov. 07, 2013

Nov. 07, 2013

Nov. 07, 2013

Nov. 07, 2013

Jun. 29, 2014

Nov. 30, 2013

Jun. 29, 2014

Jun. 29, 2014

Jun. 29, 2014

Jun. 29, 2014

Jun. 29, 2014

Jun. 29, 2014

Jun. 29, 2014

Jun. 29, 2014

Convertible Notes Hedges Purchased [Member]

Convertible Notes Hedges Purchased [Member]

Warrant Sold [Member]

Warrant Sold [Member]

Convertible Senior Notes Due 2018 [Member]

Convertible Senior Notes Due 2018 [Member]

Significant Other Observable Inputs Level 2 [Member]

Equity Component [Member]

Debt Discount [Member]

Other Non-current Assets [Member]

Coupon Rate Plus [Member]

Non-Cash Accretion Expense [Member]

Condition One [Member]

Second Condition [Member]

Hedge_Strategies

Days

Days

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Convertible senior notes, issuance date

'2013-11

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Convertible senior notes, principal amount

$175,000,000

'

'

'

'

'

$175,000,000

'

'

'

'

'

'

'

'

Convertible senior notes, maturity date

1-Nov-18

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Convertible senior notes, Stated interest rate

'

'

'

'

'

1.75%

1.75%

'

'

'

'

'

'

'

'

Convertible senior notes, interest payment terms

'The Notes pay interest in cash semi-annually (May and November) at a rate of 1.75% per annum.

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net proceeds after issuance costs

169,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Convertible senior notes, terms of conversion

'On or after August 1, 2018 until the maturity date, the Notes may be converted at the option of the holders. Holders may convert the Notes at their option prior to August 1, 2018 only under the following circumstances: 1) During any calendar quarter commencing after the calendar quarter ending on March 31, 2014 (and only during such calendar quarter), if the last reported sale price of the Companybs common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; 2) During the five business day period after any five consecutive trading day period in which the btrading priceb per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of our common stock and the conversion rate on each such trading day; or 3) Upon the occurrence of specified corporate events, including if there is a fundamental change.

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Convertible senior notes, conversion date

1-Aug-18

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Threshold trading days

'

'

'

'

'

'

'

'

'

'

'

'

'

20

5

Threshold consecutive trading days

'

'

'

'

'

'

'

'

'

'

'

'

'

'30 days

'5 days

Threshold percentage of conversion price

'

'

'

'

'

'

'

'

'

'

'

'

'

130.00%

98.00%

Convertible senior notes, face amount per note

1,000

'

'

'

'

'

'

'

'

'

'

'

'

'

1,000

Convertible senior notes, conversion ratio

45.683

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Convertible senior notes, conversion price

$21.89

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net proceeds from the offering of the Notes

169,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Notes issued

135,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Convertible senior notes, debt discount

39,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Non-convertible debt borrowing rate

7.30%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Convertible senior notes, issuance cost

'

'

'

'

'

'

'

'

2,500,000

3,000,000

250,000

'

'

'

'

Convertible senior notes, remaining amortization period

'4 years 3 months 18 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Convertible senior notes, effective interest rate description

'The effective interest rate of the Notes is 7.84% per annum (1.75% coupon rate plus 6.09% of non-cash accretion expense).

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Convertible senior notes, effective interest rate

7.84%

'

'

'

'

'

'

'

'

'

'

1.75%

6.09%

'

'

Call options

'

'

8

'

8

'

'

'

'

'

'

'

'

'

'

Common stock at exercise price

'

'

21.89

'

28.66

'

'

'

'

'

'

'

'

'

'

Conversion of shares in convertible note

'

0.045683

'

'

'

'

'

'

'

'

'

'

'

'

'

Aggregate price for convertible Note Hedge

'

39,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from call options

'

'

'

25,600,000

'

'

'

'

'

'

'

'

'

'

'

Fair value of convertible notes

'

'

'

'

'

'

'

$211,500,000

'

'

'

'

'

'

'

Convertible_Senior_Notes_Summa

Convertible Senior Notes - Summary of Principal Amounts and Related Unamortized Discount on Notes (Detail) (USD $)	Jun. 29, 2014
In Thousands, unless otherwise specified
Debt Disclosure [Abstract]	'
Principal amount of the Notes	$175,000
Unamortized discount on the Notes	37,613
Net carrying value	$137,387

Convertible_Senior_Notes_Sched

Convertible Senior Notes - Schedule of Interest Expense Recognized Related to Notes (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Jun. 29, 2014
Debt Disclosure [Abstract]	'
Contractual coupon interest expense	$768
Accretion of debt discount	1,804
Amortization of debt issuance costs	12
Total interest expense related to the Notes	$2,584

Convertible_Senior_Notes_Sched1

Convertible Senior Notes - Schedule of Aggregate Future Principal Debt Maturities (Detail) (USD $)	Jun. 29, 2014
In Thousands, unless otherwise specified
Debt Disclosure [Abstract]	'
2015 - 2018	'
2019	175,000
Total	$175,000

Stockholders_Equity_Additional

Stockholders' Equity - Additional Information (Detail) (USD $)	3 Months Ended			1 Months Ended	3 Months Ended		3 Months Ended
In Millions, except Share data, unless otherwise specified	Jun. 29, 2014	Jun. 30, 2013	Mar. 31, 2014	Jul. 31, 2011	Jun. 29, 2014	Mar. 31, 2014	Jun. 29, 2014	Jun. 29, 2014	Jun. 29, 2014	Jun. 30, 2013
				2011 Stock Incentive Plan [Member]	2013 Employee Stock Purchase Plan [Member]	2013 Employee Stock Purchase Plan [Member]	Minimum [Member]	Employee Stock Options [Member]	Restricted Stock Units and Restricted Stock [Member]	Restricted Stock Units and Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'	'	'	'	'
Common stock outstanding percentage	'	'	'	4.00%	'	'	'	'	'	'
Increase and decrease of common stock	'	'	'	3,400,000	'	'	'	'	'	'
Reserved for issuance of shares	'	22,900,000	'	'	'	'	'	'	'	'
Company's common stock for owners, more than	'	'	'	'	'	'	10.00%	'	'	'
Stock options vesting period	'	'	'	'	'	'	'	'4 years	'	'
Nonqualified stock options may be granted at an exercise price, not less than	100.00%	'	'	'	'	'	'	'	'	'
Common stock, for an exercise price of not less than	110.00%	'	'	'	'	'	'	'	'	'
Stock options expiration period	'10 years	'	'	'	'	'	'	'	'	'
Aggregate intrinsic value of the stock options exercised	$3	$11.50	'	'	'	'	'	'	'	'
Unamortized stock-based compensation expense, reduced for estimated forfeitures and related to non-vested options	17.1	18.6	'	'	'	'	'	'	'	'
Unrecognized expense of stock option, period for recognition	'2 years 6 months 11 days	'3 years 2 months 12 days	'	'	'	'	'	'	'3 years 1 month 17 days	'
Total unrecognized compensation cost	'	'	'	'	'	'	'	'	$37.40	'
Weighted-average grant-date fair value per share	'	'	'	'	'	'	'	'	$18.61	$12.77
Maximum employee subscription percentage	'	'	'	'	10.00%	'	'	'	'	'
Purchase Plan description	'	'	'	'	'The purchase price of stock under the Purchase Plan is equal to 85% of the lower of (i) the fair market value of the Company's common stock on the first day of each offering period, or (ii) the fair market value of the Company's common stock on the purchase date (as defined in the Purchase Plan). Each offering period consists of one purchase period of approximately six months duration.	'	'	'	'	'
Purchase price of stock under the Purchase Plan	'	'	'	'	85.00%	'	'	'	'	'
Shares purchased	'	'	'	'	61,000	'	'	'	'	'
Shares reserved for issuance under the Purchase Plan	32,772,000	'	29,693,000	'	339,000	400,000	'	'	'	'

Stockholders_Equity_Stock_Opti

Stockholders' Equity - Stock Option Activities (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 29, 2014	Mar. 30, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'	'
Options Available for Grant, Beginning Balance	12,595	'
Options Available for Grant, Increase to stock option pool	3,533	'
Options Available for Grant, Options granted	-949	'
Options Available for Grant, Options exercised	'	'
Options Available for Grant, Options canceled	51	'
Options Available for Grant, Ending Balance	15,230	12,595
Options Issued and Outstanding, Beginning Balance	8,276	'
Options Issued and Outstanding, Options granted	949	'
Options Issued and Outstanding, Options exercised	-198	'
Options Issued and Outstanding, Options canceled	-51	'
Options Issued and Outstanding, Ending Balance	8,976	8,276
Options Issued and Outstanding, Vested and expected to vest	7,602	'
Options Issued and Outstanding, Exercisable	3,199	'
Weighted-Average Exercise Price, Beginning Balance	$10.37	'
Weighted-Average Exercise Price, Options granted	$18.01	'
Weighted-Average Exercise Price, Options exercised	$5.41	'
Weighted-Average Exercise Price, Options canceled	$11.33	'
Weighted-Average Exercise Price, Ending Balance	$11.28	$10.37
Weighted-Average Exercise Price, Vested and expected to vest	$10.71	'
Weighted-Average Exercise Price, Exercisable	$7.80	'
Weighted- Average Remaining Contractual Term (In Years), Balance	'7 years 9 months 15 days	'7 years 10 months 13 days
Weighted-Average Remaining Contractual Term (In Years), Vested and expected to vest	'7 years 7 months 13 days	'
Weighted-Average Remaining Contractual Term (In Years), Exercisable	'6 years 9 months	'
Aggregate Intrinsic Value, Beginning Balance	$102,072	'
Aggregate Intrinsic Value, Ending Balance	95,996	102,072
Aggregate Intrinsic Value, Vested and expected to vest	85,729	'
Aggregate Intrinsic Value, Exercisable	$45,389	'

Stockholders_Equity_Stock_Opti1

Stockholders' Equity - Stock Option Activities (Parenthetical) (Detail) (USD $)	3 Months Ended
	Jun. 29, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Weighted-average fair value per share	$6.53

Stockholders_Equity_WeightedAv

Stockholders' Equity - Weighted-Average Assumptions in Determining Stock-Based Compensation Expense Options Granted (Detail) (Employee Stock Options [Member])	3 Months Ended
	Jun. 29, 2014	Jun. 30, 2013
Employee Stock Options [Member]	'	'
Expected Term	'2 years 6 months 11 days	'4 years 8 months 1 day
Volatility	41.90%	41.40%
Risk-free interest rate	1.42%	0.73%
Dividend yield	0.00%	0.00%

Stockholders_Equity_Restricted

Stockholders' Equity - Restricted Stock Unit and Restricted Stock Activity (Detail) (Restricted Stock Units and Restricted Stock [Member], USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 29, 2014	Jun. 30, 2013
Restricted Stock Units and Restricted Stock [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Shares Unvested, Beginning period	3,325	'
Shares, Granted	440	'
Shares, Vested	-210	'
Shares, Forfeited	-37	'
Shares Unvested, Ending period	3,518	'
Weighted average grant date fair value per share, Unvested Beginning period	$16.63	'
Weighted average grant date fair value per share, Granted	$18.61	$12.77
Weighted average grant date fair value per share, Vested	$12.72	'
Weighted average grant date fair value per share, Forfeited	$17.26	'
Weighted average grant date fair value per share, Unvested Ending period	$17.10	'

Stockholders_Equity_Summary_of

Stockholders' Equity - Summary of Total Stock-Based Compensation Cost (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Jun. 29, 2014	Jun. 30, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Total stock-based compensation expense	$7,635	$2,818
Cost of Revenue [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Total stock-based compensation expense	657	237
Research and Development [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Total stock-based compensation expense	3,518	1,072
Selling, General and Administrative [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Total stock-based compensation expense	$3,460	$1,509

Stockholders_Equity_Common_Sto

Stockholders' Equity - Common Stock Reserved for Future Issuance (Detail)	Jun. 29, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Shares available for future issuance	24,433	21,298
Warrants to purchase common stock	8,000	7,995
Total common stock reserved for future issuances	32,772	29,693
2013 Employee Stock Purchase Plan [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Total common stock reserved for future issuances	339	400
Employee Stock Options [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Shares available for future issuance	8,976	8,276
Restricted Stock Units and Restricted Stock [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Shares available for future issuance	3,518	3,325
Reserved for Future Equity Incentive Grants [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Shares available for future issuance	11,939	9,697

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended
	Jun. 29, 2014	Jun. 30, 2013
Income Tax Disclosure [Abstract]	'	'
Income tax provision	$279,000	$1,808,000
Uncertain tax positions within Long-term liabilities	$9,800,000	'

Acquisition_Additional_Informa

Acquisition - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended	12 Months Ended
	Oct. 31, 2013	Jun. 29, 2014	Mar. 30, 2014	Oct. 31, 2013
Business Acquisition [Line Items]	'	'	'	'
Business acquisition, purchase price	$100,000,000	'	'	'
Business acquisition, contingent future expense reimbursements	2,200,000	2,200,000	'	'
Business acquisition, contingent cash payment	'	'	'	70,000,000
Business acquisition, fair value of contingent consideration	'	'	'	0
Acquisition related costs	'	'	2,100,000	'
Fair value of intangible assets	'	37,400,000	'	'
Analog Devices, Inc. [Member]	'	'	'	'
Business Acquisition [Line Items]	'	'	'	'
Business acquisition, agreement date	'	14-Oct-13	'	'
Business acquisition, effective date	'	31-Oct-13	'	'
Developed Technology [Member]	'	'	'	'
Business Acquisition [Line Items]	'	'	'	'
Fair value of intangible assets	'	28,520,000	'	'
Estimated useful life of intangible assets	'	'6 years	'	'
Customer Relationships [Member]	'	'	'	'
Business Acquisition [Line Items]	'	'	'	'
Fair value of intangible assets	'	$1,560,000	'	'
Estimated useful life of intangible assets	'	'7 years	'	'

Acquisition_Summary_of_Purchas

Acquisition - Summary of Purchase Price of Assets Acquired and Liabilities Assumed (Detail) (USD $)	Jun. 29, 2014	Mar. 30, 2014
In Thousands, unless otherwise specified
Assets Acquired	'	'
Inventories	$5,107	'
Property and equipment, net	4,339	'
Intangible assets	37,400	'
Goodwill	50,952	50,952
Total assets acquired	97,808	'
Total purchase price (net of $2.2 million of contingent expense reimbursements)	97,808	'
Developed Technology [Member]	'	'
Assets Acquired	'	'
Intangible assets	28,520	'
In-Process Research & Development [Member]	'	'
Assets Acquired	'	'
Intangible assets	7,330	'
Customer Relationships [Member]	'	'
Assets Acquired	'	'
Intangible assets	$1,560	'

Acquisition_Summary_of_Purchas1

Acquisition - Summary of Purchase Price of Assets Acquired and Liabilities Assumed (Parenthetical) (Detail) (USD $)	0 Months Ended	3 Months Ended
In Millions, unless otherwise specified	Oct. 31, 2013	Jun. 29, 2014
Business Combinations [Abstract]	'	'
Contingent expense reimbursements	$2.20	$2.20

Acquisition_Summary_of_Fair_Va

Acquisition - Summary of Fair Value and Estimated Useful Lives of Intangible Assets (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Jun. 29, 2014
Acquired Finite-Lived Intangible Assets [Line Items]	'
Fair Value Amount	$37,400
Developed Technology [Member]	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
Fair Value Amount	28,520
Estimated Useful Life	'6 years
Customer Relationships [Member]	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
Fair Value Amount	$1,560
Estimated Useful Life	'7 years

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended	8 Months Ended
	Jun. 29, 2014	Jun. 29, 2014
Goodwill And Intangible Assets Disclosure [Abstract]	'	'
Changes in carrying amount of goodwill	'	$0
Decrease in goodwill due to adjustment in preliminary purchase price allocation	-100,000	'
Increase to fixed assets, based on fair market value	100,000	'
Amortization for acquired intangible assets	$1,268,000	'

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets - Summary of Intangible Assets and Accumulated Amortization (Detail) (USD $)	Jun. 29, 2014
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]	'
Intangible assets, Gross	$30,080
Intangible assets, Accumulated Amortization	3,317
Intangible assets, Net	26,763
Developed Technology [Member]	'
Finite-Lived Intangible Assets [Line Items]	'
Intangible assets, Gross	28,520
Intangible assets, Accumulated Amortization	3,168
Intangible assets, Net	25,352
Customer Relationships [Member]	'
Finite-Lived Intangible Assets [Line Items]	'
Intangible assets, Gross	1,560
Intangible assets, Accumulated Amortization	149
Intangible assets, Net	$1,411

Goodwill_and_Intangible_Assets4

Goodwill and Intangible Assets - Estimated Future Amortization Expense Related to Intangible Assets (Detail) (USD $)	Jun. 29, 2014
In Thousands, unless otherwise specified
Goodwill And Intangible Assets Disclosure [Abstract]	'
2015 (remaining 9 months)	$3,732
2016	4,976
2017	4,976
2018	4,976
2019	4,976
Thereafter	3,127
Intangible assets, Net	$26,763

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (USD $)	Jun. 29, 2014	Mar. 30, 2014	Jul. 07, 2014	Jul. 07, 2014	Jul. 07, 2014	Jul. 07, 2014	Jul. 07, 2014	Jul. 07, 2014	Jul. 07, 2014	Jul. 07, 2014
			Subsequent Events [Member]	Subsequent Events [Member]	Subsequent Events [Member]	Subsequent Events [Member]	Subsequent Events [Member]	Subsequent Events [Member]	Subsequent Events [Member]	Subsequent Events [Member]
			TPI Equity Awards [Member]	Movea Equity Awards [Member]	Movea Equity Awards [Member]	TPI Purchase Agreement [Member]	TPI Purchase Agreement [Member]	Movea Purchase Agreement [Member]	Short-Form Purchase Agreement [Member]	Short-Form Purchase Agreement [Member]
					Maximum [Member]
Subsequent Event [Line Items]	'	'	'	'	'	'	'	'	'	'
Common stock aggregate value	$225,363,000	$215,958,000	$5,000,000	$3,000,000	'	'	$6,000,000	'	'	'
Common stock cash at closing	'	'	'	'	'	13,000,000	'	'	61,500,000	'
Business acquisition cash contingent	'	'	'	'	'	12,000,000	'	'	13,000,000	'
Business acquisition maximum contingent cash payable	'	'	36,000,000	78,000,000	'	'	'	'	'	'
Ownership percentage	'	'	'	'	'	'	'	95.00%	'	5.00%
Common stock bonuses	'	'	'	'	$600,000	'	'	'	'	'