InvenSense Inactive 10-K28 May 152015 FY Annual reportFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 29, 2015	8-May-15	Sep. 28, 2014
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	29-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY
Trading Symbol	INVN
Entity Registrant Name	InvenSense Inc
Entity Central Index Key	1294924
Current Fiscal Year End Date	-26
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		91,029,000
Entity Public Float			$1,527

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 29, 2015	Mar. 30, 2014
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Current assets:
Cash and cash equivalents	$85,637	$26,025
Short-term investments	129,919	91,307
Accounts receivable	44,522	39,009
Inventories	75,105	73,032
Prepaid expenses and other current assets	14,950	19,587
Total current assets	350,133	248,960
Property and equipment, net	41,849	25,239
Intangible assets, net	45,508	35,360
Goodwill	139,175	50,952
Long-term investments		128,755
Other assets	9,226	5,469
Total assets	585,891	494,735
Current liabilities:
Accounts payable	23,130	18,964
Accrued liabilities	31,991	14,985
Total current liabilities	55,121	33,949
Long-term debt	143,017	135,583
Other long-term liabilities	28,252	11,375
Total liabilities	226,390	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 March 29, 2015 and March 30, 2014
Common stock:
Common stock, $0.001 par value-750,000 shares authorized, 90,894 shares issued and outstanding at March 29, 2015; 88,332 shares issued and outstanding at March 30, 2014	262,677	215,958
Accumulated other comprehensive (loss)	-4	-38
Retained earnings	96,828	97,908
Total stockholders' equity	359,501	313,828
Total liabilities and stockholders' equity	$585,891	$494,735

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 29, 2015	Mar. 30, 2014
Statement of Financial Position [Abstract]
Preferred stock, par value	$0.00	$0.00
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	750,000,000	750,000,000
Common stock, shares issued	90,894,000	88,332,000
Common stock, shares outstanding	90,894,000	88,332,000

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 29, 2015	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Income Statement [Abstract]
Net revenue	$99,279	$115,864	$90,195	$66,681	$58,998	$66,684	$70,941	$55,910	$372,019	$252,533	$208,634
Costs of revenue	56,333	65,468	58,854	35,505	31,675	35,094	34,364	26,591	216,160	127,724	97,937
Gross profit	42,946	50,396	31,341	31,176	27,323	31,590	36,577	29,319	155,859	124,809	110,697
Operating expenses:
Research and development	25,231	24,391	21,593	19,408	15,985	14,522	9,810	8,114	90,623	48,431	24,648
Selling, general and administrative	15,325	15,551	14,592	13,918	15,102	15,663	11,424	9,155	59,386	51,344	29,391
Litigation settlement					500	14,500				15,000
Total operating expenses	40,556	39,942	36,185	33,326	31,587	44,685	21,234	17,269	150,009	114,775	54,039
Income (loss) from operations	2,390	10,454	-4,844	-2,150	-4,264	-13,095	15,343	12,050	5,850	10,034	56,658
Interest (expense)	-2,659	-2,690	-2,620	-2,584	-2,548	-1,464			-10,553	-4,012	-2
Other income (expense), net	269	-281	1,199	181	96	-219	210	80	1,368	167	350
Income (loss) before income taxes		7,483	-6,265	-4,553	-6,716	-14,778	15,553	12,130	-3,335	6,189	57,006
Income tax provision (benefit)	-399	-2,738	603	279	-1,084	-2,599	1,945	1,808	-2,255	70	5,301
Net income (loss)	$399	$10,221	($6,868)	($4,832)	($5,632)	($12,179)	$13,608	$10,322	($1,080)	$6,119	$51,705
Net income (loss) per share of common stock:
Basic	$0	$0.11	($0.08)	($0.05)	($0.06)	($0.14)	$0.16	$0.12	($0.01)	$0.07	$0.62
Diluted	$0	$0.11	($0.08)	($0.05)	($0.06)	($0.14)	$0.15	$0.12	($0.01)	$0.07	$0.59
Weighted average shares outstanding used in computing net income (loss) per share:
Basic	90,359	89,779	88,997	88,302	87,691	87,047	86,289	85,038	89,359	86,520	82,738
Diluted	92,619	92,336	89,928	88,302	87,691	87,047	89,778	87,914	89,359	89,928	87,359

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (Loss) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income (loss)	($1,080)	$6,119	$51,705
Other comprehensive income (loss):
Unrealized gain (loss) on available-for-sale securities, net of tax expense (benefit) of $19, $(48) and $28 in fiscal years 2015, 2014 and 2013, respectively	34	-88	49
Comprehensive income (loss)	($1,046)	$6,031	$51,754

Consolidated_Statements_of_Com1

Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Unrealized gain (loss) on available-for-sale securities, tax expense (benefit)	$19	($48)	$28

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (USD $)	Total	Common Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]
In Thousands, except Share data	Total	Common Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]
Beginning Balance at Apr. 01, 2012	$176,877	$136,792	$1	$40,084
Beginning Balance, shares at Apr. 01, 2012		80,890,000
Issuance of common stock from restricted stock and vesting of restricted stock units, shares		422,000
Issuance of common stock from exercise of stock warrants	81	81
Issuance of common stock from exercise of stock warrants, shares		299,000
Offering costs	22	22
Issuance of common stock from exercise of stock options	5,617	5,617
Issuance of common stock from exercise of stock options, shares	3,369,000	3,369,000
Excess tax benefit from stock-based compensation	7,077	7,077
Stock compensation relating to stock options issued to employees	8,519	8,519
Other comprehensive income (loss)	49		49
Net income	51,705			51,705
Ending Balance at Mar. 31, 2013	249,947	158,108	50	91,789
Ending Balance, shares at Mar. 31, 2013		84,980,000
Issuance of common stock from restricted stock and vesting of restricted stock units, shares		105,000
Issuance of common stock from exercise of stock warrants, shares		90,000
Equity component of the convertible notes issuance	39,280	39,280
Equity component of the convertible notes issuance costs	-1,995	-1,995
Purchase of convertible note hedges	-39,118	-39,118
Issuance of common stock from exercise of stock options	14,410	14,410
Issuance of common stock from exercise of stock options, shares	3,221,000	3,221,000
Repurchase of restricted stock for tax withholding	-1,233	-1,233
Repurchase of restricted stock for tax withholding, shares		-64,000
Excess tax benefit from stock-based compensation	4,839	4,839
Stock-based compensation	16,024	16,024
Proceeds from sale of warrant	25,643	25,643
Other comprehensive income (loss)	-88		-88
Net income	6,119			6,119
Ending Balance at Mar. 30, 2014	313,828	215,958	-38	97,908
Ending Balance, shares at Mar. 30, 2014		88,332,000
Issuance of common stock from restricted stock and vesting of restricted stock units, shares		784,000
Issuance of common stock from exercise of stock options	9,233	9,233
Issuance of common stock from exercise of stock options, shares	1,421,000	1,421,000
Issuance of common stock from restricted stock and vesting of restricted stock units	0	0	0	0
Issuance of common stock from Employee Stock Purchase Plan	2,195	2,195
Issuance of common stock from Employee Stock Purchase Plan, shares		170,000
Issuance of common stock from business acquisitions	5,703	5,703
Issuance of common stock from business acquisitions, shares		236,000
Repurchase of restricted stock for tax withholding	-957	-957
Repurchase of restricted stock for tax withholding, shares		-49,000
Excess tax benefit from stock-based compensation	41	41
Stock-based compensation	30,504	30,504
Other comprehensive income (loss)	34		34
Net income	-1,080			-1,080
Ending Balance at Mar. 29, 2015	$359,501	$262,677	($4)	$96,828
Ending Balance, shares at Mar. 29, 2015		90,894,000

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net income (loss)	($1,080)	$6,119	$51,705
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	10,203	4,492	1,998
Non-cash interest expense	7,505	2,854
Amortization of intangible assets	7,003	2,073
Write-off of in-process research and development	770
Loss on disposal of property and equipment	552		8
Gain on equity investment	-890
Stock-based compensation expense	30,504	16,024	8,519
Deferred income tax assets	-5,484	-2,337	-348
Tax effect of employee benefit plan	42	4,839	7,077
Excess tax benefit from stock-based compensation	-42	-4,839	-7,077
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	-4,895	-8,911	-18,167
Inventories	-2,072	-44,164	-11,522
Prepaid expenses and other assets	8,778	-2,699	-9,583
Other assets	-135	-1,013	1,006
Accounts payable	3,122	4,474	7,592
Accrued liabilities	12,961	11,790	4,062
Net cash provided by (used in) operating activities	66,842	-11,298	35,270
Cash flows from investing activities:
Acquisitions, net of cash acquired	-71,326	-99,324
Purchase of property and equipment	-27,315	-17,207	-5,071
Purchase of patents	-2,120
Sales and maturities of available-for-sale investments	145,974	86,233	20,979
Purchase of available-for-sale investments	-55,845	-206,949	-116,254
Net cash used in investing activities	-10,632	-237,247	-100,346
Cash flows from financing activities:
Proceeds from debt issuance, net of issuance costs		169,259
Payment for purchase of convertible notes hedge		-39,118
Proceeds from sale of warrants		25,643	-390
Proceeds from the issuance of common stock, net	10,425	13,115	5,617
Payments of long-term debt and capital lease obligations	-9	-11	-28
Payment of contingent consideration	-7,056
Excess tax benefit from stock-based compensation	42	4,839	7,077
Net cash provided by financing activities	3,402	173,727	12,276
Net increase (decrease) in cash and cash equivalents	59,612	-74,818	-52,800
Cash and cash equivalents:
Beginning of period	26,025	100,843	153,643
End of period	85,637	26,025	100,843
Supplemental disclosures of cash flow information:
Cash paid for interest	2,960		2
Cash paid (received) for income taxes	-5,855	183	40
Noncash investing and financing activities:
Unpaid purchases of property and equipment	1,070	1,770	1,845
Total contingent consideration from business acquisition	16,034
Unrealized gain (loss) from available-for-sale investments	-6	-59	77
Non-cash warrant exercises		90	150
Proceeds receivable from the exercise of stock options	$108	$62

Organization_and_Summary_of_Si

Organization and Summary of Significant Accounting Policies	12 Months Ended
Organization and Summary of Significant Accounting Policies	Mar. 29, 2015
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 sensor systems on a chip, including accelerometers, gyroscopes and microphones for the mobile, wearable, smart home, gaming, industrial, and automotive market segments. The Company delivers leading solutions based on its advanced motion and sound technology and is dedicated to bringing the best-in-class size, performance and cost solutions to market; targeting solutions such as: smartphones, tablets, wearables, console and portable video gaming devices, digital television and set-top box remote controls, fitness accessories, sports equipment, digital still cameras, automobiles, ultra-books, laptops, hearing aids, stabilization systems, tools, navigation devices, remote controlled toys and other household consumer and industrial devices.
	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. During the fiscal years ended March 29, 2015, March 30, 2014 and March 31, 2013, foreign currency losses were $198,000, $260,000 and $51,000, respectively.
	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 three most recent fiscal years ended on March 29, 2015 (“fiscal year 2015”), March 30, 2014 (“fiscal year 2014”) and March 31, 2013 (“fiscal year 2013”) were each comprised of 52 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.
	Cash Equivalents
	The Company considers all highly liquid instruments acquired with a remaining maturity of three months or less when purchased to be cash equivalents. Cash and cash equivalents are stated at cost, which approximates their fair value.

	Available-for-Sale Investments
	Securities with remaining maturities at the time of purchase of greater than three months are considered available for sale investments. If the securities have remaining maturities of less than twelve months from the balance sheet date they are classified as short-term investments in the Company’s consolidated balance sheets; if their maturities exceed twelve months beyond the balance sheet date, they are classified as long-term investments in the Company’s consolidated balance sheets. Available-for-sale securities are carried at fair value with temporary unrealized gains and losses, net of taxes, reported within “accumulated other comprehensive income (loss)” in the Company’s consolidated financial statements.
	Available-for-sale investments are considered to be impaired when a decline in fair value is judged to be other than temporary. The Company considers available quantitative and qualitative evidence in evaluating potential impairment of its investments on a quarterly basis. If the cost of an investment exceeds its fair value, management evaluates, among other factors, general market conditions, the duration and extent to which the fair value is less than cost, and the Company’s intent and ability to hold the investment. Once a decline in fair value is determined to be other than temporary, an impairment charge is recorded and a new cost basis in the investment is established. During fiscal 2015, fiscal 2014 and fiscal 2013, the Company did not identify any other than temporary impairments.
	Accounts Receivable
	Trade accounts receivable are recorded at the invoiced amount, net of allowances for doubtful accounts and sales returns and allowances. The allowance for doubtful accounts is based on the Company’s assessment of the collectability of customer accounts. The Company periodically reviews the need for an allowance by considering factors such as historical experience, credit quality, the age of the accounts receivable balances and current economic conditions that may affect a customer’s ability to pay. The Company recorded bad debt expense of $26,000 during the year ended March 29, 2015. No allowance for doubtful accounts was recorded during the years ended March 30, 2014 and March 31, 2013. The reserve for sales returns and allowances is based on specific criteria including agreements to provide rebates and other factors known at the time, as well as estimates of the amount of goods shipped that will be returned. To determine the adequacy of the reserve for sales returns and allowances, the Company analyzes historical experience of actual returns as well as current product return information. During fiscal 2015, fiscal 2014 and fiscal 2013, the Company incurred charges related to its reserve for sales returns and allowances of $357,000, $134,000 and $84,000, respectively. At March 2015 and March 2014, the balances for the reserve for sales returns and allowances were $57,000, and $91,000, respectively.
	Concentration of Credit Risk
	Financial instruments, which potentially subject the Company to concentrations of credit risk, consist primarily of cash, cash equivalents, investments, advances to vendors, accounts receivable and the Note Hedge (see Note 5). The Company limits exposure to credit loss by placing cash, cash equivalents and investments with major financial institutions within the United States that management assesses to be of high credit quality. The Company periodically reviews the credit worthiness of its customers and generally does not require collateral or other security to support accounts receivable. The Company has not experienced any significant losses on accounts receivables or on deposits of cash and cash equivalents for fiscal 2015, fiscal 2014 or fiscal 2013.
	The majority of the Company’s products are shipped through its distributors or contract manufacturers, which are the legal counter-party to the sales. The Company does not refer to these intermediaries as our customers in this report. When the Company references customers, the Company is referring to the manufacturers of consumer electronics devices that are the end customer that these intermediaries sell the Company’s products to or that incorporate the Company’s products into finished products. These manufacturers of consumer electronics devices are categorized as our customers as they are responsible for selection of our sensors in their products. For accounting purposes, any disclosure about the composition of the Company’s accounts receivable refers to the intermediary, which is the legal counter-party in a particular contract, and any disclosure about the composition of the Company’s revenue (e.g., greater than 10% customers) refers to the end customers of both those intermediaries and the Company. Some of the Company’s intermediaries may serve as such for more than one or more of the Company’s customers. As a result, attempting to compare or correlate disclosures about our accounts receivable composition as of a particular date with the disclosures regarding revenues generated by our customers for the period ending on the same date can be difficult or misleading.
	A distributor and a customer accounted for 38% and 26% of accounts receivable, respectively, at March 29, 2015. At March 30, 2014, three customers accounted for 28%, 19% and 19% of total accounts receivable. No other customers accounted for more than 10% of total accounts receivable at March 2015 or March 2014.
	For fiscal 2015, a distributor and a customer accounted for 30% and 28% of total net revenue. For fiscal 2014 one customer accounted for 35% of total net revenue. For fiscal 2013 three customers accounted for 24%, 18% and 11% of total net revenue. No other customers accounted for more than 10% of total net revenue for fiscal 2015, fiscal 2014 or fiscal 2013.
	Inventories
	Inventories are stated at the lower of cost or market on a first-in, first-out basis. Inventories include finished good parts that may be specialized in nature and subject to obsolescence. The Company periodically reviews the quantities and carrying values of inventories to assess whether the inventories are recoverable. The costs associated with write-downs of inventory for excess quantity and technological obsolescence are charged to cost of revenue as incurred. Actual demand may materially differ from the Company’s projected demand, and this difference could have a material impact on the Company’s gross margin and inventory balances based on additional provisions for excess or obsolete inventory or a benefit from sales of inventory previously written down. Write-down amounts charged (credited) to cost of revenues for fiscal years 2015 and 2013 were $8.6 million and $(3.0) million, respectively. Write-down amounts charged to cost of revenues for fiscal year 2014 were insignificant.
	Property and Equipment, net
	Property and equipment, net are stated at cost and are depreciated using the straight-line method over the estimated useful lives of the assets. The estimated useful lives are as follows: production equipment and furniture and fixtures—four to five years, lab equipment, computer equipment and software—three to five years, and leasehold improvements—over the shorter of the estimated useful life or the remaining lease term.
	Business Combinations
	The purchase price of an acquisition is allocated to the underlying assets acquired and liabilities assumed based upon their estimated fair values at the date of acquisition. To the extent the purchase price exceeds the fair value of the net identifiable tangible and intangible assets acquired and liabilities assumed, such excess is allocated to goodwill. The Company determines the estimated fair values after review and consideration of relevant information, including discounted cash flows, quoted market prices and estimates made by management. The Company adjusts the preliminary purchase price allocation, as necessary, during the measurement period of up to one year after the acquisition closing date as it obtains more information as to facts and circumstances existing at the acquisition date impacting asset valuations and liabilities assumed. Acquisition-related costs are recognized separately from the acquisition and are expensed as incurred.

	Goodwill
	Goodwill represents the excess of the purchase price over the fair value of the net tangible and identifiable intangible assets acquired in a business combination. In accordance with Accounting Standards Codification (“ASC”) 350, the Company reviews goodwill for impairment at the reporting unit level on an annual basis or whenever events or changes in circumstances indicate the carrying value may not be recoverable. The Company has determined that it has a single reporting unit for purposes of performing its goodwill impairment test. The Company performed the first step of the two-step goodwill impairment test. As the Company uses the market approach to assess impairment, its common stock price is an important component of the fair value calculation. The Company performed its annual impairment test during the quarter ended December 28, 2014 and determined that the fair value of its reporting unit was substantially in excess of its carrying value, and thus its goodwill was not impaired. As of March 29, 2015, no events or changes in circumstances indicate the carrying value may not be recoverable.
	Intangible Assets
	Intangible assets consist of developed technology and customer relationships, and in-process research and development resulting from the Company’s acquisition of MEMS microphone business of Analog Devices, Inc. (“ADI”) in fiscal 2014 and Movea S.A and Trusted Positioning, Inc. in fiscal 2015 (see note 8) as well as patents acquired in fiscal 2015. Acquired intangible assets that are subject to amortization are developed technology and customer relationships and are recorded at cost, net of accumulated amortization. Intangible assets are amortized on a straight-line basis over their estimated useful lives. In-process research and development capitalized during business combination is amortized only after successful completion of project, over the expected useful life.
	Impairment of Long Lived Assets
	The Company regularly reviews the carrying amount of its long-lived assets, including property and equipment and intangible assets, as well as the useful lives, to determine whether indicators of impairment may exist which warrant adjustments to carrying values or estimated useful lives. An impairment loss would be recognized when the sum of the expected future undiscounted net cash flows is less than the carrying amount of the asset. Should impairment exist, the impairment loss would be measured based on the excess of the carrying amount of the asset over the asset’s fair value.
	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 increased primarily due to an increase in unit sales volume and a commensurate increase in the volume of product returned under the warranty agreements. 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 the product warranty liability during fiscal 2015, fiscal 2014 and fiscal 2013:


			Fiscal Year
			2015				2014				2013
			(in thousands)
	Beginning balance		$	80			$	123			$	361
	Provision for warranty			221				59				60
	Adjustments related to changes in estimate			193				(71	)			(262	)
	Less: actual warranty costs			(153	)			(31	)			(36	)

	Ending balance		$	341			$	80			$	123


	Revenue Recognition
	Revenue from the sale of the Company’s products is recognized when all of the following four criteria are met: (1) persuasive evidence of an arrangement exists; (2) the product has been delivered; (3) the price is fixed or determinable; and (4) collection is reasonably assured. Delivery takes place after the transfer of title which historically has occurred upon shipment of the product unless otherwise stated in the customer agreement.
	For direct customers (i.e., other than distributors), the Company recognizes revenue when title to the product is transferred to the customer, which occurs upon shipment or delivery, depending upon the terms of the customer order.
	The Company primarily enters into sales transactions with distributors in which the distributor is purchasing product for an identified end customer. For these transactions, the Company recognizes net revenue upon either shipment or delivery to the distributor, depending upon when title transfers under the terms of the order. Pursuant to the terms and conditions contained in the agreement with its distributors, all sales to distributors purchased for an identified end customer are non-refundable, do not have rights to return product purchases except under the Company’s standard warranty terms, and do not include any price concessions or price protection.
	Research and Development
	Research and development activities are expensed as incurred.
	Stock-Based Compensation
	The Company measures the cost of employee services received in exchange for equity incentive awards, including stock options, based on the grant date fair value of the award. The fair value is estimated using the Black-Scholes option pricing model. The Black-Scholes model requires us to estimate certain key assumptions including future stock price volatility, expected term of the options, risk free rates, and dividend yields. Certain of our stock-based awards contained a market-based condition for vesting; these awards were valued using a Monte Carlo simulation analysis to model and value multiple possible outcomes. The Company also estimates potential forfeiture of equity incentive awards granted and adjust compensation expense accordingly. The estimate of forfeitures is adjusted over the estimated term to the extent that the actual forfeiture rate or expected forfeiture rate is expected to differ from these estimates. The resulting cost is recognized over the period during which the employee is required to provide services in exchange for the award, which is usually the vesting period. The Company recognizes compensation expense over the vesting period using the straight-line method and classifies these amounts in the statements of income based on the department to which the related employee is assigned. See Note 6 “Stockholders’ Equity” for a description of our stock-based employee compensation plans and the assumptions the Company uses to calculate the fair value of stock-based employee compensation.
	Income Taxes
	The Company accounts for income taxes in accordance with ASC 740-10 “Income Taxes,” which requires the asset and liability approach and the recognition of taxes payable or receivable for the current year and deferred tax liabilities and assets for future tax consequences of events that have been recognized in the Company’s Consolidated Financial Statements and related Notes or tax returns. The measurement of current and deferred tax liabilities and assets are based on provisions of the enacted laws; the effects of future changes in tax laws or rates are not anticipated. Deferred tax assets are reduced, if necessary, by the amount of any tax benefits that, based on available evidence, are not expected to be realized. Valuation allowances are established when necessary to reduce deferred tax assets to the amount that is more likely than not to be realized.

	ASC 740-10 also prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. ASC 740-10 also provides guidance on de-recognition, classification, interest and penalties, accounting in interim periods, disclosure and transition. The Company’s policy is to recognize interest and penalties related to unrecognized tax benefits in income tax provision.
	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:


		Fiscal Year
		2015				2014				2013
		(in thousands, except per share data)
Numerator:
Basic and Diluted
Net income (loss)		$	(1,080	)		$	6,119			$	51,705

Denominator:
Basic shares:
Weighted-average shares used in computing basic net income (loss) per share			89,359				86,520				82,738

Diluted shares:
Weighted-average shares used in computing basic net income (loss) per share			89,359				86,520				82,738
Effect of potentially dilutive securities:
Stock options and unvested restricted stock			—				3,367				4,445
Common stock warrants			—				41				176

Weighted-average shares used in computing diluted net income (loss) per share			89,359				89,928				87,359

Net income (loss) per share
Basic		$	(0.01	)		$	0.07			$	0.62
Diluted		$	(0.01	)		$	0.07			$	0.59
The following summarizes the potentially dilutive securities outstanding at the end of each period that were excluded from the computation of diluted net income per common share for the periods presented as their effect would have been antidilutive:


		Fiscal Year
		2015				2014				2013
		(in thousands)
Employee stock options			8,562				1,992				4,498
Unvested restricted stock units			3,699				1,338				110

Total antidilutive securities			12,261				3,330				4,608


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”). On or after August 1, 2018 until the maturity date, the Notes may be converted at the option of the holders under certain circumstances. 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 (see Note 5).
Comprehensive Income (Loss)
Comprehensive income (loss) includes certain changes in equity that are excluded from net income. Specifically, unrealized gains and losses are included in accumulated other comprehensive income (loss). During fiscal 2015, fiscal 2014 and fiscal 2013, comprehensive income (loss) included a combination of the current period net income and unrealized gain (loss) on available for sale investments.
Segment Information
The Company operates in one operating segment by designing, developing, manufacturing and marketing sensor systems on a chip. The Chief Executive Officer has been identified as the Chief Operating Decision Maker as defined by Financial Accounting Standards Board’s ASC 280 “Segment Reporting”. Enterprise-wide information is provided in accordance with ASC 280. Geographical revenue information is based on the location of our customers’ head offices. Property and equipment information is based on the physical location of the assets at the end of each fiscal period.
Property and equipment by country were as follows:


Country		March 29,				March 30,
Country		2015				2014
		(in thousands)
Taiwan		$	31,334			$	16,902
United States			9,442				7,605
Other			1,073				732

		$	41,849			$	25,239

Net revenues from unaffiliated customers by country were as follows:


		Fiscal Year
Region		2015				2014				2013
		(in thousands)
Korea		$	130,807			$	112,880			$	69,874
United States			129,665				24,681				16,667
China			65,115				43,796				14,742
Japan			18,788				45,493				65,663
Taiwan			21,264				18,737				39,203
Rest of world			6,380				6,946				2,485

		$	372,019			$	252,533			$	208,634

Recent Accounting Pronouncements
In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“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 standard requires public entities to apply the amendments in ASU 2014-09 for annual reporting periods beginning after December 15, 2016, including interim reporting periods therein. On April 1, 2015, the FASB proposed for a one-year deferral of the effective date for this pronouncement. The Company then will be required to implement the new revenue recognition standard for the first quarter of fiscal year 2019. The Company is currently evaluating the impact on its consolidated financial statements.
On April 7, 2015, the FASB issued ASU 2015-03, Simplifying the Presentation of Debt Issuance Costs. ASU 2015-03 requires debt issuance costs to be presented in the balance sheet as a direct deduction from the carrying value of the associated debt liability, consistent with the presentation of a debt discount. For public business entities, the standard is effective for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. Early adoption is permitted for financial statements that have not been previously issued. The Company then will be required to implement the new revenue recognition standard for the first quarter of fiscal year 2017. The Company is currently evaluating the impact on its consolidated financial statements.

Cash_Equivalents_and_Available

Cash Equivalents and Available-for-sale Investments	12 Months Ended
Cash Equivalents and Available-for-sale Investments	Mar. 29, 2015
Cash and Cash Equivalents [Abstract]
Cash Equivalents and Available-for-sale Investments	2	Cash Equivalents and Available-for-sale Investments
	At March 29, 2015, of the $85.6 million of the Company’s cash and cash equivalents, $61.6 million was cash, $24.0 million was cash equivalents, of which $22.0 million was invested in money market funds and $2.0 million was invested in corporate debt. At March 29, 2015, $47.7 million of the $85.6 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 29, 2015, the Company had short-term available-for-sale investments of $129.9 million which is held in the US entity.
	At March 30, 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 30, 2014, $9.8 million of the $26.0 million of cash and cash equivalents were held by our foreign subsidiaries. Additionally, as of March 30, 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 30, 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:
	March 29, 2015:
	Assets and liabilities measured at fair value on a recurring basis were presented in the Company’s consolidated balance sheet as of March 29, 2015.


			March 29, 2015			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)
	Assets
	Money Market Funds		$	22,023		$	22,023		$	—			$	—
	Corporate Notes and Bonds			122,124			—			122,124				—
	Commercial Paper			6,991			—			6,991				—
	Municipal Notes and Bonds			302			—			302				—
	U.S. Agency Securities			2,502			—			2,502				—

	Total investments		$	153,942		$	22,023		$	131,919			$	—

	Liabilities
	Contingent consideration		$	9,124		$	—		$	—			$	9,124

	Assets
	Cash equivalents		$	24,023		$	24,023		$	—			$	—
	Short-term investments			129,919			—			129,919				—
	Long-term investments			—			—			—				—

	Total investments		$	153,942		$	24,023		$	129,919			$	—

	Liabilities
	Accrued liabilities		$	6,364									$	6,364
	Long-term liabilities			2,760										2,760

	Total contingent consideration		$	9,124		$	—		$	—			$	9,124


			March 29, 2015			Gross			Gross				March 29, 2015
			Amortized Cost			Unrealized			Unrealized				Estimated FMV
						Gain			Loss
	Corporate Notes and Bonds		$	122,131		$	22		$	(29	)		$	122,124
	Commercial Paper			6,992			—			(1	)			6,991
	Municipal Notes and Bonds			302			—			—				302
	U.S. Agency Securities			2,500			2			—				2,502

	Total Available-for-sale investments		$	131,925		$	24		$	(30	)		$	131,919

	Money Market Funds													22,023

	Total Aggregate Fair Value												$	153,942

	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, 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 fiscal 2015.

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 30, 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


		30-Mar-14			Gross			Gross				30-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

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, 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 fiscal 2014.
Level 3 financial liabilities:
The following table provides a summary of changes in fair value of the Company’s contingent consideration categorized as Level 3 for the twelve months ended March 29, 2015:


		March 29, 2015
		(in thousands)
Beginning balance		$	—
Add: Contingent consideration in connection with acquisitions			16,034
Payments made on contingent liabilities			(7,863	)
Change in fair value and other			953

Ending balance		$	9,124


Contingent consideration on acquired businesses (See Note 8) was measured at fair value using Level 3 inputs as defined in the fair value hierarchy. The following table presents certain information about the significant unobservable inputs used in the fair value measurement for the contingent consideration measured at fair value on a recurring basis using significant unobservable inputs:


Description		Valuation Techniques		Significant Unobservable Inputs
Liabilities: Contingent consideration		Present value of a Probability Weighted Earn-out model using an appropriate discount rate.		Estimate of achieving the milestones.
An increase in the estimate of probability of meeting the milestones could result in a significantly higher estimated fair value of the contingent consideration liability. Alternatively, a decrease in the estimate of probability of meeting the milestones could result in a significantly lower estimated fair value of contingent consideration liability. As a result of meeting certain milestones, the Company raised the value of the liabilities by $0.8 million. No other changes were made to the probability estimates for the year ended March 29, 2015.
The fair value of contingent consideration was derived from a probability weighted earn-out model of future contingent payments. The cash payments are expected to be made upon meeting the milestones (See Note 8). The valuation of the contingent consideration was based on a collaborative effort of the Company’s engineering and finance departments, and third party valuation experts. The estimate of meeting the milestones and discount rates will be reviewed quarterly and updated as and when necessary. Potential valuation adjustments will be made to adjust the contingent consideration payments. These adjustments will be recorded in the statements of operations.

Balance_Sheet_Details

Balance Sheet Details	12 Months Ended
Balance Sheet Details	Mar. 29, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Balance Sheet Details	3	Balance Sheet Details
	Inventories
	Inventories at March 29, 2015 and March 30, 2014 consist of the following:


			March 29, 2015				March 30, 2014
			(in thousands)
	Work in process		$	49,146			$	58,641
	Finished goods			25,959				14,391

	Total inventories		$	75,105			$	73,032

	Prepaid Expenses and Other Current Assets
	Prepaid expenses and other current assets at March 29, 2015 and March 30, 2014 consist of the following:


			March 29, 2015				March 30, 2014
			(in thousands)
	Prepaid expenses		$	4,280			$	3,495
	Income tax receivable			1,398				5,932
	Other receivables			2,675				5,356
	Deferred tax assets			5,127				2,487
	Other current assets			1,470				2,317

	Total prepaid expenses and other current assets		$	14,950			$	19,587


	Property and Equipment
	Property and equipment at March 29, 2015 and March 30, 2014 consist of the following:


			March 29, 2015				March 30, 2014
			(in thousands)
	Production and lab equipment		$	47,107			$	25,890
	Computer equipment and software			6,044				4,335
	Equipment under construction			2,820				2,298
	Leasehold improvements and furniture and fixtures			7,163				3,918

	Subtotal			63,134				36,441
	Accumulated depreciation and amortization			(21,285	)			(11,202	)

	Property and equipment—net		$	41,849			$	25,239

	Depreciation expense was $10.2 million, $4.5 million and $2.0 million for fiscal 2015, 2014, and 2013, 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 2016.
	Accrued Liabilities
	Accrued liabilities at March 29, 2015 and March 30, 2014 consist of the following:


			March 29, 2015				March 30, 2014
			(in thousands)
	Contingent consideration, current portion		$	6,364			$	—
	Payroll-related expenses			7,197				4,207
	Bonuses			5,352				3,019
	Legal fees			921				2,527
	Accrued contractual coupon interest payable on convertible senior notes			1,252				1,158
	Deferred revenue			1,584				800
	Income tax payable			311				117
	Other tax payable			768				—
	Acquisition-related payable			1,380				—
	Other accrued liabilities			6,862				3,157

	Total accrued liabilities		$	31,991			$	14,985

	Other Long-term Liabilities
Other long-term liabilities at March 29, 2015 and March 30, 2014 consist of the following:


		March 29, 2015				March 30, 2014
		(in thousands)
Long-term tax payable		$	11,918			$	8,513
Deferred tax liabilities			3,936				—
Deferred revenue			3,400				1,200
Deferred rent			3,630				1,662
Contingent consideration, noncurrent portion			2,760				—
Long-term debt			2,472				—
Other long-term liabilities			136				—

Total other long-term liabilities		$	28,252			$	11,375

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Mar. 29, 2015
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 2022.
	Future minimum lease payments, net of future minimum lease income, under operating leases as of March 29, 2015 are as follows:


	Fiscal Years Ending:		Amount
			(in thousands)
	2016			5,425
	2017			5,865
	2018			6,292
	2019			6,409
	2020			5,049
	Beyond			1,501

	Total		$	30,541

	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 $5.2 million, $5.6 million and $2.0 million for fiscal 2015, fiscal 2014 and fiscal 2013, respectively. The Company’s rental income from sublease was approximately $0.3 million for fiscal 2015. No rental income from sublease was recorded for fiscal years 2014 and 2013.
	Purchase Commitments
	The Company has non-cancelable purchase commitments with its foundry vendors. Future minimum payments of $50.8 million under the purchase commitments as of March 29, 2015 are less then twelve months.
	401(k) Savings Plan
	In November 2004, the Company established a defined contribution savings plan under Section 401(k) of the Internal Revenue Code. This plan covers substantially all employees who meet minimum age and service requirements and allows participants to defer a portion of their annual compensation on a pretax basis. The Company may make contributions to the plan at the discretion of the Board of Directors. During the fiscal years 2015 and 2014, the Company contributed $0.2 million and $43,000 to the plan, respectively.
	Legal Proceedings and Contingencies
	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.
	On January 7, 2015 a purported shareholder filed a class action complaint in the U.S. District Court, Northern District of California against the Company and two of the Company’s current and former executives (the “Securities Case”). Jim McMillan, Individually and on Behalf of All Others Similarly Situated v. InvenSense, Inc., et al. The complaint alleges that the defendants violated the federal securities laws by making materially false and misleading statements regarding our business results between July 29, 2014 and October 28, 2014, and seeks unspecified damages along with plaintiff’s costs and expenses, including attorneys’ fees. A second complaint, William Lendales v. InvenSense, Inc. et al., was filed on January 12, 2015, by a different purported shareholder, in the same court, setting forth substantially the same allegations. A third complaint, Plumber & Steamfitters Local 21 Pension Fund v. InvenSense, Inc., et al., was filed on January 16, 2015, by a different purported shareholder, in the same court, setting forth substantially the same allegations. A fourth complaint, William B. Davis vs. InvenSense, Inc., et al., was filed on January 29, 2015, by a different purported shareholder, in the same court, setting forth substantially the same allegations. A fifth complaint, Saratoga Advantage Trust Technology & Communications Portfolio v. InvenSense et al., was filed on March 11, 2015. The Company has undertaken an evaluation of these complaints. In light of the unresolved legal issues, while a loss is reasonably possible, the amount of any potential loss cannot be estimated. At this stage, the Company is unable to predict the outcome of this matter and, accordingly, cannot estimate the potential financial impact on the Company’s business, operating results, cash flows or financial position.
	On January 13, 2015, another purported shareholder filed a shareholder derivative complaint against two of our current and former officers and several of our current directors in the U.S. District Court, Northern District of California (the “Derivative Case”). George Rollins, derivatively on behalf of InvenSense, Inc. v. Behrooz Abdi, et. al. In this complaint, the plaintiff makes allegations similar to those presented in the Securities Case, but the plaintiff asserts various state law causes of action, including claims of breach of fiduciary duty and unjust enrichment. A second complaint, Linda Karr, derivatively on behalf of InvenSense, Inc. v. Behrooz Abdi, et. al., was filed on January 14, 2015, by a different purported shareholder, in the same court, setting forth substantially the same allegations. A third derivative complaint was filed in Santa Clara Superior Court, entitled Robert Bilbrey v. Behrooz Abdi et al., was filed on March 20, 2015. The Company has undertaken an evaluation of these complaints. In light of the unresolved legal issues, while a loss is reasonably possible, the amount of any potential loss cannot be estimated. At this stage, the Company is unable to predict the outcome of this matter and, accordingly, cannot estimate the potential financial impact on the Company’s business, operating results, cash flows or financial position.
	On May 16, 2012, and again on March 11, 2013 STMicroelectronics, Inc. (“STMicro”) filed patent infringement complaints against us, alleging infringement of certain of their patents (collectively, the “Asserted Patents”). STI alleged that certain lnvenSense MEMS products and services infringed one or more claims of the Asserted Patents. On July 9, 2012, we filed counterclaims against STI alleging infringement of certain of our patents. On February 9, 2014, we and STI settled and resolved all litigation and proceedings pending between us and STI for a one-time cash payment of $15.0 million to STI, and entered into a patent cross license agreement. The other terms of the settlement and the patent cross license agreement remain confidential and are not expected to have a material impact on our future results. This settlement and patent cross license resolved all outstanding legal proceeding between us and STI. The settlement resulted in recognition of a pre-tax charge of $15.0 million in fiscal year 2014.
	The semiconductor and MEMS industries are characterized by companies that hold large numbers of patents and other intellectual property rights and that vigorously pursue, protect and enforce intellectual property rights. STMicroelectonics, Inc., one of the Company’s competitors, previously filed two lawsuits and an action before the United States International Trade Commission asserting that several of the Company’s products infringe the competitor’s patents, although those lawsuits have been settled. A non-practicing entity asserted in litigation that one of the Company’s gyroscope products infringes a patent held by the competitor. This matter was resolved. Another competitor has made generalized assertions of potential infringement and the Company has met with the competitor to discuss the matter. The Company believes it does not infringe any valid and enforceable patent identified by this competitor; in addition, the Company has identified certain of its patents which the competitor may be infringing. Due to the nature and uncertainties of patent law, licensing and litigation, there can be no assurances of whether and how this matter will be resolved or the associated costs thereto. Related preliminary discussions are ongoing, though it is too early to assess the likelihood of any resolution (whether by mutual release, cross license or other terms) or if this matter will ultimately result in litigation, in which case future costs could be significant. In the future other third parties may assert against the Company and its customers and distributors, their patent and other intellectual property rights to technologies that are important to our business.
	The Company is not aware of any other pending legal matters or claims, individually or in the aggregate, that is expected to have a material adverse impact on its consolidated financial position, results of operations, or cash flows. However, the Company’s analysis of whether a claim may proceed to litigation cannot be predicted with certainty, nor can the results of litigation be predicted with certainty. Nevertheless, defending any of these actions, regardless of the outcome, may be costly, time consuming, distract management personnel, and have a negative effect on our business. An adverse outcome in any of these actions, including a judgment or settlement, may cause a material adverse effect on our future business, operating results, and/or financial condition.
	The Company indemnifies certain customers, distributors, suppliers and subcontractors for attorney fees and damages and costs awarded against such parties in certain circumstances in which the Company’s products are alleged to infringe third-party intellectual property rights, including patents, registered trademarks or copyrights. Indemnification costs are charged to operations as incurred. There were no indemnification costs for fiscal year 2015 and fiscal year 2013.
	The Company’s Third Amended and Restated Bylaws require the Company to indemnify its directors and officers and employees to the fullest extent permitted by the Delaware General Corporation Law (DGCL). In addition, the Company’s current directors, including the Company’s chief executive officer and certain executive officers, have entered into separate indemnification agreements with the Company. The Company’s Second Amended and Restated Certificate of Incorporation, as amended, limits the liability of directors to the Company or its stockholders to the fullest extent permitted by the DGCL. The obligation to indemnify generally means that the Company is required to pay or reimburse the individuals’ reasonable legal expenses and possibly damages and other liabilities incurred in connection with these matters.

Convertible_Senior_Notes

Convertible Senior Notes	12 Months Ended
Convertible Senior Notes	Mar. 29, 2015
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 $169.3 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 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 of $21.89 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 as defined.
	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 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 March 29, 2015 the remaining amortization period of the debt discount and the issuance costs is 3.6 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):


			March 29, 2015		March 30, 2014
			(in thousands)
	Principal amount of the Notes		$	175,000	$	175,000
	Unamortized discount on the Notes			31,983		39,417

	Net carrying value		$	143,017	$	135,583

	The following table presents the amount of interest expense recognized related to the Notes (in thousands):


			Fiscal Year
			2015		2014
			(in thousands)
	Contractual coupon interest expense		$	3,059	$	1,158
	Accretion of debt discount			7,435		2,835
	Amortization of debt issuance costs			51		19

	Total interest expense related to the Notes		$	10,545	$	4,012

	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 March 29, 2015 was $169.5 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	12 Months Ended
Stockholders' Equity	Mar. 29, 2015
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 fiscal 2013, 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 3.5 million shares for fiscal year 2015.
	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 or units to eligible persons, including employees, nonemployees, members of the Board of Directors, consultants and other independent advisors who provide services to the Company.
	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)
	Outstanding—April 1, 2012			9,710				11,116			$	4.31
	Increase to stock option pool			3,236
	Options granted			(4,057	)			4,057				12.13
	Exercised options			—				(3,369	)			1.67
	Cancelled options			1,309				(1,309	)			8.53

	Outstanding—March 31, 2013			10,198				10,495			$	7.65
	Increase to stock option pool			3,399
	Options granted			(1,578	)			1,578				16.14
	Exercised options			—				(3,221	)			4.47
	Cancelled options			576				(576	)			9.71

	Outstanding—March 30, 2014			12,595				8,276			$	10.37
	Increase to stock option pool			3,533				—				—
	Options granted			(1,916	)			1,916				19.22
	Exercised options							(1,421	)			6.5
	Cancelled options			464				(464	)			11.89

	Outstanding—March 29, 2015			14,676				8,307			$	12.99		7.6	$	29,817

	Vested and expected to vest—March 29, 2015							7,476			$	12.61		7.49	$	28,783
	Exercisable—March 29, 2015							3,634			$	9.89		6.68	$	21,006

	Additional information regarding options outstanding as of March 29, 2015 is as follows (in thousands except per share amounts):


			Options Outstanding										Options Exercisable
	Exercise		Number				Weighted-				Weighted-		Number		Weighted-
	Prices		Oustanding at				Average				Average Exercise		Exercisable at		Average Exercise
			March 29, 2015				Remaining				Price per Share		March 29,		Price per Share
			(in thousands)				Contractual Life						2015
							(in years)						(in thousands)
	$0.08 - $10.10			2,068				5.7			$	6.11		1,591	$	5.28
	$10.11 - $11.57			1,887				7.6			$	11.36		903	$	11.38
	$11.85 - $17.49			2,077				8.1			$	13.83		795	$	13.43
	$17.66 - $24.99			2,275				8.9			$	19.83		345	$	19.11

				8,307				7.6			$	12.99		3,634	$	9.89

	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 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 fiscal 2015, fiscal 2014 and fiscal 2013 was $20.1 million, $39.4 million and $36.1 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. As of March 29, 2015, the remaining unamortized stock-based compensation expense, reduced for estimated forfeitures and related to non-vested options, was $17.6 million to be amortized over a weighted-average remaining period of 2.4 years. Total unrecognized expense will be adjusted for future changes in estimated forfeitures.
	The Company used the following weighted-average assumptions in determining stock-based compensation expense for option grants made during fiscal 2015, fiscal 2014 and fiscal 2013.


			Fiscal Year
			2015		2014		2013
	Expected term (in years)		4.5 - 5.0		4.7		5.4
	Volatility		41.4% - 45.9%		40.1% - 41.9%		42.7% - 48.5%
Risk-free interest rate		1.4% - 1.6%		0.6% - 2.7%		0.6% - 1.3%
Dividend rate		0%		0%		0%
The weighted-average grant date fair value of the Company’s stock options granted in fiscal years 2015, 2014 and 2013 was $7.16, $5.90 and $5.12 per share, prospectively.

Market-based Awards
During fiscal 2013, the Company’s current chief executive officer was granted options to purchase up to 622,115 shares at $11.57 per share whose vesting is contingent upon meeting various price target thresholds that will trigger a four year ratable vesting period if the minimum twenty day closing stock prices cross thresholds of $15.00, $17.50 and $20.00, respectively. As of March 29, 2015, 212,000 shares of the granted options were exercisable. The exercise price of the options represents the stock price on the date of grant, and the options have a legal term of 10 years. The fair value of each option granted was estimated on the date of grant using a Monte Carlo Simulation analysis valuation model, assumes that price target thresholds will be achieved and results in an estimated term for the tranches ranging from 5.0 to 6.2 years. If the price target thresholds are not met, compensation cost is not reversed. The Company used the following assumptions in estimating the fair value of the shares; expected volatility 46.5%, expected dividends 0%, and risk-free rate of 0.8%. The weighted-average grant-date fair value of options granted during the period was $4.87 and is included in the stock option activities table above. During fiscal years 2015, 2014 and 2013, none of the market-based options were exercised. At March 29, 2015, there was $0.7 million of total unrecognized compensation cost reduced for estimated forfeitures and related to non-vested shares; that cost is expected to be recognized over a period of approximately 4 years.
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 units and restricted stock activities		Shares				Weighted Average
						Grant Date
						Fair Value Per Share
		(in thousands, except per share amount)
Unvested at April 1, 2012			118			$	12.47
Granted			750				12.08
Released			(8	)			17.79
Forfeited			(54	)			12.48

Unvested at March 31, 2013			806				12.05
Granted			2,952				17.28
Released			(251	)			11.84
Forfeited			(182	)			13.62

Unvested at March 30, 2014			3,325				16.63
Granted			1,989				19.01
Released			(888	)			16.09
Forfeited			(396	)			18.39

Unvested at March 29, 2015			4,030			$	17.75

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 March 29, 2015, there was approximately $47.7 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 2.9 years.

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 March 29, 2015, 170,000 shares had been purchased.
During fiscal 2015 and 2014, compensation expense recognized in connection with the Purchase Plan was $0.9 million and $0.2 million, respectively.
Stock-Based Compensation Expense
Total stock-based compensation costs for the Company’s stock plans for fiscal 2015, fiscal 2014 and fiscal 2013 are as follows:


		Fiscal Year
		2015				2014				2013
		(in thousands)
Cost of revenue		$	2,520			$	1,296			$	649
Research and development			14,183				6,218				2,753
Selling, general and administrative			13,801				8,510				5,117

Total stock-based compensation expense		$	30,504			$	16,024			$	8,519

Common Stock
As of March 2015 and March 2014, common stock reserved for future issuance was as follows (in thousands):


Common stock reserved for issuance		March 29, 2015,				March 30, 2014,
		(in thousands)
Stock plans
Outstanding stock options			8,307				8,276
Outstanding restricted stock units and restricted stocks			4,030				3,325
Reserved for future equity incentive grants			10,300				9,697

			22,637				21,298
Employee Stock Purchase Plan			230				400
Warrants to purchase common stock			7,995				7,995

Total common stock reserved for future issuances			30,862				29,693

Income_Taxes

Income Taxes	12 Months Ended
Income Taxes	Mar. 29, 2015
Income Tax Disclosure [Abstract]
Income Taxes	7	Income Taxes
	In fiscal year 2015, we recorded an income tax benefit of ($2.3) million compared to an income tax provision of $0.1 million for fiscal year 2014. The benefit was primarily due to the research and development tax credits, a current year loss in the U.S., and was negatively affected by an increase in non-deductible stock option expense, and other deductible federal tax attributes.

	The components of income before taxes are as follows:


			Fiscal Year
			2015				2014			2013
			(in thousands)
	United States		$	(12,723	)		$	(3,817	)	$	11,883
	International			9,388				10,006			45,123

	Income (loss) before provision for income taxes		$	(3,335	)		$	6,189		$	57,006

	Income tax expense was comprised of the following:


			Fiscal Year
			2015				2014			2013
			(in thousands)
	Current
	Federal		$	468			$	1,658		$	5,553
	State			1				1			6
	International			3,843				179			142

	Total current			4,312				1,838			5,701

	Deferred
	Federal			(5,715	)			(1,856	)		(375	)
	State			—				—			(6	)
	International			(852	)			88			(19	)

	Total deferred			(6,567	)			(1,768	)		(400	)

	Income tax provision		$	(2,255	)		$	70		$	5,301

	The provision for income taxes differs from the amount computed by applying the statutory rates as follows:


			Fiscal Year
			2015				2014			2013
	Income tax provision at the federal statutory rate			35	%			35	%		35	%
	Research and development credits			90.7				(27.3	)		(2.1	)
	Foreign tax rate differential			(27.3	)			(22.0	)		(25.8	)
	Non deductible stock compensation			(27.3	)			19.5			2.2
	Other			(3.5	)			(4.1	)		—

	Effective tax rate			67.6	%			1.1	%		9.3	%

	Over 90% of our revenues are derived from sales to customers located outside the U.S. A significant percentage of our pre-tax income in 2015, 2014 and 2013 was generated internationally, primarily from our Cayman Island subsidiary, which is currently a zero tax jurisdiction. Since 2011, our Cayman Island subsidiary has procured the rights to manufacture and sell our products in non-US locations via an intercompany technology license arrangement with its U.S. parent company. In addition, the Company has not provided for U.S. federal income and foreign withholding taxes on undistributed earnings from its non-U.S. subsidiaries, as it is the practice and intention of the Company to reinvest the earnings of its non-U.S. subsidiaries in those operations. Our effective tax rate is highly dependent upon the geographic distribution of our worldwide earnings or losses, and the tax regulations in each geographic region. We expect that a large percentage of our consolidated pre-tax income will continue to be derived from, and reinvested in, our overseas operations. We anticipate that this pre-tax income will continue to be subject to foreign tax at significantly lower tax rates when compared to the United States federal statutory tax rate.
	The components of the deferred tax asset are as follows:


			March 29, 2015				March 30, 2014
			(in thousands)
	Deferred tax assets:
	Accrued expenses and reserves		$	3,179			$	1,769
	Stock based compensation			4,081				2,167
	Research and development credits			8,418				4,115
	Net operating loss carryforwards			1,001				1,001

	Gross Deferred tax assets			16,679				9,052
	Valuation Allowance			(5,221	)			(3,761	)

Deferred tax assets, net of valuation allowance			11,458				5,291

Deferred tax liabilities:
Fixed Assets			(175	)			(44	)
Acquired Intangibles			(3,935	)			—

Total deferred tax liabilities			(4,110	)			(44	)

Deferred tax assets, net of valuation allowance and deferred tax liabilities		$	7,348			$	5,247

As of March 29, 2015, we had approximately $11.5 million in net deferred tax assets (DTAs) of which $10.6 million represent the U.S portion of these DTAs. These U.S. DTAs include approximately $4.2 million related mainly to Research and Development Credits as well as other tax attributes in the sum of $6.4 million representing accrued expenses and stock based compensation that can be used to offset taxable income in future periods and reduce our income taxes payable in those future periods. Realization of our deferred tax assets is dependent upon future federal, state and foreign taxable income. Many of those credit carryforwards will expire if they are not used within certain time periods. As of March 29, 2015, management determined that there is sufficient positive evidence to conclude that it is more likely than not that we will have sufficient taxable income in the future that will allow us to realize these DTAs. However, it is possible that some or all of these credits could ultimately expire unused, especially if our U.S. entity does not make a taxable profit, which has been limited mainly due to stock option deductions since the company went public. Therefore, unless we are able to generate sufficient taxable income from our U.S. operations, a substantial valuation allowance to reduce our U.S. DTAs may be required, which would materially increase our expenses in the period the allowance is recognized and materially adversely affect our results of operations and statement of financial condition. Conversely, the foreign attributable net DTAs of roughly $0.9 million will continue to be utilized as those foreign entities are deemed to be profitable on an on-going basis due to the companies’ intercompany arrangements. Our judgments regarding future profitability may change due to future market conditions, changes in U.S. or international tax laws and other factors. These changes, if any, may require possible material adjustments to these deferred tax assets, resulting in a reduction in net income or an increase in net loss in the period when such determinations are made.
Deferred income taxes reflect the net tax effects of temporary differences between the carrying amount of assets and liabilities for financial reporting purposes and the amounts for income tax purposes. The Company has not provided for U.S. federal income and foreign withholding taxes on undistributed earnings from non-U.S. operations as of March 2015, as in general, it is the practice and intention of the Company to reinvest the earnings of its non-U.S. subsidiaries in those operations. The Company has not made a provision for U.S. or additional foreign withholding taxes on the excess of the amount for financial reporting over the tax basis of investments in foreign subsidiaries that are essentially permanent in duration of approximately $99.8 million and $88.4 million at March 2015 and March 2014, respectively. Generally, such amounts become subject to U.S. taxation upon the remittance of dividends and under certain other circumstances. It is not practicable to estimate the amount of deferred tax liability related to investments in these foreign subsidiaries.
As a result of certain realization requirements of ASC 718, Compensation—Stock Compensation, the table of deferred tax assets and liabilities shown above does not include certain deferred tax assets as of March 29, 2015 that arose directly from (or the use of which was postponed by) tax deductions related to equity compensation that are greater than the compensation recognized for financial reporting. Equity will be increased by approximately $7.5 million if and when such deferred tax assets are realized. The Company used ASC 740 ordering when determining when excess tax benefits have been realized.
At March 29, 2015, the Company had approximately $18.0 million of federal net operating loss carryforwards for next 20 years and the Company had approximately $7.7 million federal research and development tax credit available to carryforwards which will expire from FY2032 to FY2035.
At March 29, 2015, the Company had approximately $17.6 million of California state loss carryforwards. The California net operating loss carryforwards expire between 2017 and 2022. At March 2015, the Company had approximately $8.3 million California state research tax credit carryforwards. The California credits are not subject to expiration under current California tax law.
At March 29, 2015, the Company had approximately $18.5 million of foreign net operating losses. These foreign net operating losses will carryforward indefinitely until they are utilized.
The Company maintains a valuation allowance against its California deferred tax assets as of March 2015. The Company considers all available evidence, both positive and negative, in assessing the extent to which a valuation allowance should be applied against deferred tax assets. The Company’s valuation allowance increased $1.5 million as of March 29, 2015 compared to March 30, 2014, and increased $1.3 million as of March 30, 2014 compared to March 31, 2013.
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.
A reconciliation of the change in unrecognized tax benefits is as follows:


(in thousands)
Balance at April 1, 2012		$	3,855
Increases in unrecognized tax benefits			3,961

Balance at March 31, 2013			7,816
Increases in unrecognized tax benefits			2,797

Balance at March 30, 2014			10,613
Increases arising from acquisitions			7,605
Increases in unrecognized tax benefits			4,309

Balance at March 29, 2015		$	22,527


Included in our gross unrecognized tax benefits balance of $22.5 million at March 2015 are $20.4 million of tax positions which would affect income tax expense if recognized. As of March 2015, approximately $2.1 million of unrecognized tax benefits have been set up as our valuation allowance which represents State research credits and State net operating losses.
The Company recognizes interest and penalties related to unrecognized tax benefits within the income tax expense line in the accompanying Consolidated Statements of Income. Accrued interest and penalties are included within the related tax liability line in the Consolidated Balance Sheet. As of March 2015, the Company had $0.4 million accrued interest related to uncertain tax matters. The Company files income tax returns in the U.S. federal, California and various international jurisdictions. The 2003 through 2014 tax years are open and may be subject to potential examination in one or more jurisdictions.
The Company is required to file U.S. federal income tax returns as well as income tax returns in various states and foreign jurisdictions. The Company is in the process of an Internal Revenue Service (“IRS”) examination for tax years 2011, 2012, 2013 and 2014. The Company may be subject to examination by California for tax years 2010 and forward. Generally, the Company is subject to routine examination for tax years 2008 and forward in various foreign tax jurisdictions in which it operates.

Acquisition

Acquisition	12 Months Ended
Acquisition	Mar. 29, 2015
Business Combinations [Abstract]
Acquisition	8	Acquisition
	The Company completed two acquisitions in fiscal 2015 and one acquisition in fiscal 2014. The acquisitions have been accounted for using the acquisition method of accounting in accordance with 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 fair values of the identifiable intangible assets 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.
	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.

	Contingent consideration: The fair value of contingent consideration was derived from a probability weighted earn-out model of future contingent payments. The cash payments are expected to be made upon meeting the milestones. Potential valuation adjustments will be made to adjust the contingent consideration payments. These adjustments will be recorded in the statements of operations.
	Movea S.A
	On July 22, 2014, the Company acquired 100% equity interest of Movea, a company formed under the laws of France, and a leading provider of software for ultra-low power location, activity tracking and context sensing. The acquisition of Movea further scales the Company’s leadership in motion software.
	The Company paid $60.9 million in cash as consideration for the acquisition and could pay an additional $13.0 million in cash contingent upon the achievement of certain milestones within one year of the acquisition.
	The table below is a summary of the preliminary purchase price allocation of the fair value of assets acquired and liabilities assumed in connection with the acquisition of Movea (in thousands):


	Cash consideration		$	60,900
	Contingent consideration			8,400

			$	69,300

	Preliminary allocation of purchase price:
	Current assets		$	3,082
	Fixed assets			209
	Other non-current assets			592
	Developed technology			7,200
	Goodwill			68,330
	Current liabilities			(5,016	)
	Long-term liabilities			(5,097	)

	Total preliminary purchase price		$	69,300

	The purchase price included $2.6 million of long-term debt which was included in the long-term liabilities. The debt was measured at fair value using the effective interest rate method and considered as Level 3 inputs as defined in the fair value hierarchy, which approximates carrying value as of March 29, 2015.
	The purchase price includes contingent considerations of (i) $8.0 million payable in cash to the former Movea shareholders upon a design win with a major smartphone manufacturer within one year of closing date, and (ii) $5.0 million payable in cash to the former Movea shareholders upon a specific product development milestone before December 29, 2014. The fair value of the contingent consideration of $8.4 million was derived from a probability weighted earn-out model of future contingent payments and recorded in accrued liabilities. The product development milestone of $5.0 million was achieved and the payment was made in fiscal 2015. The difference between the contractual amount of $5.0 million and the fair value of this contingent consideration was recorded in the research and development expense for the year ended March 29, 2015.
	The purchase price exceeded the fair value of the net tangible and identifiable intangible assets acquired and, as a result, the Company recorded goodwill in connection with this transaction. The acquisition will provide assembled workforce and synergy with other of the Company’s offerings. These factors primarily contributed to a purchase price that resulted in goodwill.

	The following table presents certain information on acquired identifiable intangible assets related to the Movea acquisition:


			Estimated Fair Value				Estimated Useful Life
			(in thousands)				(in years)
	Developed technology		$	7,200				5
	The fair value of developed technology was determined using a cost approach, which includes an estimate of time and expenses required to recreate the intangible asset. 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 revenue over the estimated useful life of 5 years.
	Pro Forma Financial Information
	The unaudited pro forma combined financial information is for informational purposes only and does not purport to represent what the Company’s actual results would have been if the acquisition had been completed as of the date indicated above, or that may be achieved in the future. The unaudited pro forma combined supplemental information does not include the effects of any cost savings from operating efficiencies or synergies that may result from the acquisition.
	The following unaudited pro forma financial information presents the combined results of operations of InvenSense and Movea as if the acquisition had occurred as of the beginning of fiscal 2014:


			Fiscal Year
			2015				2014
			(in thousands)
	Net revenue		$	372,693			$	255,709
	Net income (loss)		$	(4,097	)		$	(800	)
	Following the acquisition, sales of Movea products have been less than 10% of consolidated revenues for the eight months ended March 29, 2015.
	Trusted Positioning, Inc.
	On August 29, 2014, the Company completed the acquisition of Trusted Positioning, Inc., (“TPI”), a Canadian corporation, which is an indoor/outdoor positioning software company to provide ‘Positioning Everywhere’. The acquisition of TPI, particularly its advanced location tracking software, strengthens the Company’s position as a provider of intelligent sensor System on Chips (SoC) for the fast growing mobile market.
	The Company’s acquisition of TPI was completed through a step acquisition. In fiscal 2014, the Company made investments totaling $0.3 million to own approximately 4.57% of TPI’s outstanding common stock. On August 29, 2014, the Company purchased the remaining outstanding common stock of TPI for a total consideration of $25.9 million. The total purchase price, as presented in the table below, consists of (i) cash of $11.4 million (ii) issuance of 236,000 shares of the Company’s common stock with a fair value of $5.7 million (iii) contingent considerations with a combined fair value of $7.6 million payable upon TPI’s achievement of certain product development milestones, and (iv) initial investments with a fair value of $1.2 million.

	The table below is a summary of the preliminary purchase price allocation for the 100% equity interest of the fair value of assets acquired and liabilities assumed in connection with the acquisition of TPI (in thousands):


	Cash consideration		$	11,379
	Issuance of common stock			5,703
	Contingent consideration			7,634
	Fair value of previously held 4.57% equity interest			1,215

		$	25,931

Preliminary allocation of purchase price:
Current assets		$	392
Fixed assets			50
Other non-current assets			546
Developed technology			8,600
Goodwill			19,893
Current liabilities			(1,247	)
Long-term liabilities			(2,303	)

Total preliminary purchase price		$	25,931

The purchase price includes contingent consideration comprised of (i) $5 million payable upon a design win within one year of acquisition, (ii) $3 million payable upon achieving a development milestone before December 29, 2014, (iii) $2 million payable upon successful development of cloud application within two years of acquisition and (iv) $2 million upon first deployment of cloud application which is expected within one year of successful development of cloud application. The contingent considerations, which was derived from a probability weighted earn-out model of future contingent payments, have a combined fair value of $7.6 million, of which $4.9 million was recorded in accrued liabilities and $2.7 million was recorded in other long-term liabilities. The development milestone of $3 million was achieved and the payment was made in fiscal 2015. The difference between the contractual amount of $3.0 million and the fair value of this contingent consideration was recorded in the research and development expense for the year ended March 29, 2015.
The following table presents certain information on acquired identifiable intangible assets related to the TPI acquisition:


		Estimated Fair Value				Estimated Useful Life
		(in thousands)				(in years)
Developed technology		$	8,600				5
The fair value of developed technology was determined using a cost approach, which includes an estimate of time and expenses required to recreate the intangible asset. 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 revenue over the estimated useful life of 5 years.
In connection with the acquisition of TPI, the Company recorded a non-cash gain of approximately $0.9 million resulting from the difference between carrying value of its initial investments in TPI of $0.3 million and fair value of such investments of $1.2 million, as of the acquisition date. This non-cash gain is recorded in “Other income, net” on the Condensed Consolidated Statement of Operations.

MEMS Microphone Business of Analog Devices, Inc.
In the third quarter of fiscal 2014, the Company acquired certain assets relating to Analog Devices, Inc. (“ADI”) 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. As of March 29, 2015, the Company received the contingent expense reimbursements of $1.4 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 and was not met the revenue targets, the fair value of the contingent consideration was 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 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 allocation of the purchase price of the assets acquired and liabilities assumed based on their fair values was as follows:


		Total Amount
		(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 table below presents certain information on acquired identifiable intangible assets related to the ADI acquisition:


		Estimated Fair Value				Estimated Useful Life
		(in thousands)				(in years)
Developed technology		$	28,520			6
Customer relationships		$	1,560			7
In-Process Research & Development		$	7,330			5-Mar
Following the acquisition, sales of microphone products have been less than 10% of consolidated revenues for the five months ended March 30, 2014 and the twelve months ended March 29, 2015.

Pro Forma Information
The unaudited pro forma combined financial information is for informational purposes only and does not purport to represent what the Company’s actual results would have been if the acquisition had been completed as of the date indicated above, or that may be achieved in the future. The unaudited pro forma combined supplemental information does not include the effects of any cost savings from operating efficiencies or synergies that may result from the acquisition.
The following unaudited pro forma financial information presents the combined results of operations of InvenSense and ADI as if the acquisition had occurred as of the beginning of fiscal 2014:


		Fiscal Year
		2014
		(in thousands)
Net revenue		$	276,592
Net income (loss)		$	4,051

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	12 Months Ended
Goodwill and Intangible Assets	Mar. 29, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	9	Goodwill and Intangible Assets
	The Company monitors the recoverability of goodwill recorded in connection with acquisitions annually, or whenever events or changes in circumstances indicate the carrying value may not be recoverable. The Company performed the annual goodwill impairment analysis during the third quarter of fiscal year 2015 and concluded that goodwill was not impaired.
	The following table summarizes the activity related to the carrying value of goodwill (in thousands):


	Balance as of March 30, 2014		$	50,952
	Goodwill recorded in connection with the acquisition of Movea S.A			68,330
	Goodwill recorded in connection with the acquisition of Trusted Positioning, Inc.			19,893

	Balance as of March 29, 2015		$	139,175

	Purchased intangible assets subject to amortization consist primarily of developed technology, customer relationships and patents and are reported net of accumulated amortization. Developed technology, customer relationships and patents 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 2016 at which time amortization will commence. The costs that the Company incurred on the in-process research and development projects after the acquisition were expensed. During fiscal 2015, the Company recorded $0.8 million of impairment on in-process research and development on the MEMS Microphone business.

	Amortization for purchased intangible assets for the years ended March 29, 2015 and March 30, 2014 was approximately $7.0 million and $2.1 million, respectively. The following table represents intangible assets and accumulated amortization:


			March 29, 2015
			Gross		Accumulated		Net
			Gross		Amortization		Net
			(in thousands)
	Developed technology		$	44,320	$	8,697	$	35,623
	Customer relationships			1,560		316		1,244
	Patents			2,120		39		2,081

	Total intangible assets subject to amortization		$	48,000	$	9,052	$	38,948



			March 30, 2014
			Gross		Accumulated		Net
			Gross		Amortization		Net
			(in thousands)
	Developed technology		$	28,520	$	1,980	$	26,540
	Customer relationships			1,560		93		1,467

	Total intangible assets subject to amortization		$	30,080	$	2,073	$	28,007

	The estimated future amortization expense related to intangible assets at March 29, 2015, is as follows:


	Fiscal Year		Estimated
			Amortization
			(in thousands)
	2016			8,607
	2017			8,607
	2018			8,607
	2019			8,607
	2020			4,390
	Thereafter			130

	Total		$	38,948

Quarterly_Financial_Data_Unaud

Quarterly Financial Data (Unaudited)	12 Months Ended
Quarterly Financial Data (Unaudited)	Mar. 29, 2015
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data (Unaudited)	10	Quarterly Financial Data (Unaudited)


	Fiscal Year 2015:		Three Months Ended
			June 29,			September 28,			December 28,			March 29,
			2014			2014			2014			2015
	Net revenue		$	66,681		$	90,195		$	115,864		$	99,279
	Costs of revenue			35,505			58,854			65,468			56,333

	Gross profit			31,176			31,341			50,396			42,946
	Operating expenses:
	Research and development			19,408			21,593			24,391			25,231
	Selling, general and administrative			13,918			14,592			15,551			15,325

	Total operating expenses			33,326			36,185			39,942			40,556

	Income (loss) from operations			(2,150	)		(4,844	)		10,454			2,390
	Interest (expense)			(2,584	)		(2,620	)		(2,690	)		(2,659	)
	Other income (expense), net			181			1,199			(281	)		269

	Income (loss) before income taxes			(4,553	)		(6,265	)		7,483			—
	Income tax provision (benefit)			279			603			(2,738	)		(399	)

	Net income (loss)		$	(4,832	)	$	(6,868	)	$	10,221		$	399

	Net income (loss) per share of common stock:
	Basic		$	(0.05	)	$	(0.08	)	$	0.11		$	0

	Diluted		$	(0.05	)	$	(0.08	)	$	0.11		$	0

	Weighted average shares outstanding used in computing net income (loss) per share:
	Basic			88,302			88,997			89,779			90,359

	Diluted			88,302			89,928			92,336			92,619



	Fiscal Year 2014:		Three Months Ended
			June 30,			September 29,			December 29,			March 30,
			2013			2013			2013			2014
	Net revenue		$	55,910		$	70,941		$	66,684		$	58,998
	Costs of revenue			26,591			34,364			35,094			31,675

	Gross profit			29,319			36,577			31,590			27,323
	Operating expenses:
	Research and development			8,114			9,810			14,522			15,985
	Selling, general and administrative			9,155			11,424			15,663			15,102
	Litigation settlement			—			—			14,500			500

	Total operating expenses			17,269			21,234			44,685			31,587

	Income (loss) from operations			12,050			15,343			(13,095	)		(4,264	)
	Interest (expense)			—			—			(1,464	)		(2,548	)
	Other income (expense), net			80			210			(219	)		96

	Income (loss) before income taxes			12,130			15,553			(14,778	)		(6,716	)
	Income tax provision (benefit)			1,808			1,945			(2,599	)		(1,084	)

	Net income (loss)		$	10,322		$	13,608		$	(12,179	)	$	(5,632	)

	Net income (loss) per share of common stock:
	Basic		$	0.12		$	0.16		$	(0.14	)	$	(0.06	)

	Diluted		$	0.12		$	0.15		$	(0.14	)	$	(0.06	)

Weighted average shares outstanding used in computing net income (loss) per share:
Basic			85,038			86,289			87,047			87,691

Diluted			87,914			89,778			87,047			87,691

Organization_and_Summary_of_Si1

Organization and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Mar. 29, 2015
Accounting Policies [Abstract]
Business	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 sensor systems on a chip, including accelerometers, gyroscopes and microphones for the mobile, wearable, smart home, gaming, industrial, and automotive market segments. The Company delivers leading solutions based on its advanced motion and sound technology and is dedicated to bringing the best-in-class size, performance and cost solutions to market; targeting solutions such as: smartphones, tablets, wearables, console and portable video gaming devices, digital television and set-top box remote controls, fitness accessories, sports equipment, digital still cameras, automobiles, ultra-books, laptops, hearing aids, stabilization systems, tools, navigation devices, remote controlled toys and other household consumer and industrial devices.
Basis of Consolidation	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. During the fiscal years ended March 29, 2015, March 30, 2014 and March 31, 2013, foreign currency losses were $198,000, $260,000 and $51,000, respectively.
Fiscal Year	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 three most recent fiscal years ended on March 29, 2015 (“fiscal year 2015”), March 30, 2014 (“fiscal year 2014”) and March 31, 2013 (“fiscal year 2013”) were each comprised of 52 weeks.
Use of Estimates	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.
Cash Equivalents	Cash Equivalents
Cash Equivalents	The Company considers all highly liquid instruments acquired with a remaining maturity of three months or less when purchased to be cash equivalents. Cash and cash equivalents are stated at cost, which approximates their fair value.
Available-for-Sale Investments	Available-for-Sale Investments
	Securities with remaining maturities at the time of purchase of greater than three months are considered available for sale investments. If the securities have remaining maturities of less than twelve months from the balance sheet date they are classified as short-term investments in the Company’s consolidated balance sheets; if their maturities exceed twelve months beyond the balance sheet date, they are classified as long-term investments in the Company’s consolidated balance sheets. Available-for-sale securities are carried at fair value with temporary unrealized gains and losses, net of taxes, reported within “accumulated other comprehensive income (loss)” in the Company’s consolidated financial statements.
	Available-for-sale investments are considered to be impaired when a decline in fair value is judged to be other than temporary. The Company considers available quantitative and qualitative evidence in evaluating potential impairment of its investments on a quarterly basis. If the cost of an investment exceeds its fair value, management evaluates, among other factors, general market conditions, the duration and extent to which the fair value is less than cost, and the Company’s intent and ability to hold the investment. Once a decline in fair value is determined to be other than temporary, an impairment charge is recorded and a new cost basis in the investment is established. During fiscal 2015, fiscal 2014 and fiscal 2013, the Company did not identify any other than temporary impairments.
Accounts Receivable	Accounts Receivable
Accounts Receivable	Trade accounts receivable are recorded at the invoiced amount, net of allowances for doubtful accounts and sales returns and allowances. The allowance for doubtful accounts is based on the Company’s assessment of the collectability of customer accounts. The Company periodically reviews the need for an allowance by considering factors such as historical experience, credit quality, the age of the accounts receivable balances and current economic conditions that may affect a customer’s ability to pay. The Company recorded bad debt expense of $26,000 during the year ended March 29, 2015. No allowance for doubtful accounts was recorded during the years ended March 30, 2014 and March 31, 2013. The reserve for sales returns and allowances is based on specific criteria including agreements to provide rebates and other factors known at the time, as well as estimates of the amount of goods shipped that will be returned. To determine the adequacy of the reserve for sales returns and allowances, the Company analyzes historical experience of actual returns as well as current product return information. During fiscal 2015, fiscal 2014 and fiscal 2013, the Company incurred charges related to its reserve for sales returns and allowances of $357,000, $134,000 and $84,000, respectively. At March 2015 and March 2014, the balances for the reserve for sales returns and allowances were $57,000, and $91,000, respectively.
Concentration of Credit Risk	Concentration of Credit Risk
	Financial instruments, which potentially subject the Company to concentrations of credit risk, consist primarily of cash, cash equivalents, investments, advances to vendors, accounts receivable and the Note Hedge (see Note 5). The Company limits exposure to credit loss by placing cash, cash equivalents and investments with major financial institutions within the United States that management assesses to be of high credit quality. The Company periodically reviews the credit worthiness of its customers and generally does not require collateral or other security to support accounts receivable. The Company has not experienced any significant losses on accounts receivables or on deposits of cash and cash equivalents for fiscal 2015, fiscal 2014 or fiscal 2013.
	The majority of the Company’s products are shipped through its distributors or contract manufacturers, which are the legal counter-party to the sales. The Company does not refer to these intermediaries as our customers in this report. When the Company references customers, the Company is referring to the manufacturers of consumer electronics devices that are the end customer that these intermediaries sell the Company’s products to or that incorporate the Company’s products into finished products. These manufacturers of consumer electronics devices are categorized as our customers as they are responsible for selection of our sensors in their products. For accounting purposes, any disclosure about the composition of the Company’s accounts receivable refers to the intermediary, which is the legal counter-party in a particular contract, and any disclosure about the composition of the Company’s revenue (e.g., greater than 10% customers) refers to the end customers of both those intermediaries and the Company. Some of the Company’s intermediaries may serve as such for more than one or more of the Company’s customers. As a result, attempting to compare or correlate disclosures about our accounts receivable composition as of a particular date with the disclosures regarding revenues generated by our customers for the period ending on the same date can be difficult or misleading.
	A distributor and a customer accounted for 38% and 26% of accounts receivable, respectively, at March 29, 2015. At March 30, 2014, three customers accounted for 28%, 19% and 19% of total accounts receivable. No other customers accounted for more than 10% of total accounts receivable at March 2015 or March 2014.
	For fiscal 2015, a distributor and a customer accounted for 30% and 28% of total net revenue. For fiscal 2014 one customer accounted for 35% of total net revenue. For fiscal 2013 three customers accounted for 24%, 18% and 11% of total net revenue. No other customers accounted for more than 10% of total net revenue for fiscal 2015, fiscal 2014 or fiscal 2013.
Inventories	Inventories
Inventories	Inventories are stated at the lower of cost or market on a first-in, first-out basis. Inventories include finished good parts that may be specialized in nature and subject to obsolescence. The Company periodically reviews the quantities and carrying values of inventories to assess whether the inventories are recoverable. The costs associated with write-downs of inventory for excess quantity and technological obsolescence are charged to cost of revenue as incurred. Actual demand may materially differ from the Company’s projected demand, and this difference could have a material impact on the Company’s gross margin and inventory balances based on additional provisions for excess or obsolete inventory or a benefit from sales of inventory previously written down. Write-down amounts charged (credited) to cost of revenues for fiscal years 2015 and 2013 were $8.6 million and $(3.0) million, respectively. Write-down amounts charged to cost of revenues for fiscal year 2014 were insignificant.
Property and Equipment, net	Property and Equipment, net
Property and Equipment, net	Property and equipment, net are stated at cost and are depreciated using the straight-line method over the estimated useful lives of the assets. The estimated useful lives are as follows: production equipment and furniture and fixtures—four to five years, lab equipment, computer equipment and software—three to five years, and leasehold improvements—over the shorter of the estimated useful life or the remaining lease term.
Business Combinations	Business Combinations
Business Combinations	The purchase price of an acquisition is allocated to the underlying assets acquired and liabilities assumed based upon their estimated fair values at the date of acquisition. To the extent the purchase price exceeds the fair value of the net identifiable tangible and intangible assets acquired and liabilities assumed, such excess is allocated to goodwill. The Company determines the estimated fair values after review and consideration of relevant information, including discounted cash flows, quoted market prices and estimates made by management. The Company adjusts the preliminary purchase price allocation, as necessary, during the measurement period of up to one year after the acquisition closing date as it obtains more information as to facts and circumstances existing at the acquisition date impacting asset valuations and liabilities assumed. Acquisition-related costs are recognized separately from the acquisition and are expensed as incurred.
Goodwill	Goodwill
Goodwill	Goodwill represents the excess of the purchase price over the fair value of the net tangible and identifiable intangible assets acquired in a business combination. In accordance with Accounting Standards Codification (“ASC”) 350, the Company reviews goodwill for impairment at the reporting unit level on an annual basis or whenever events or changes in circumstances indicate the carrying value may not be recoverable. The Company has determined that it has a single reporting unit for purposes of performing its goodwill impairment test. The Company performed the first step of the two-step goodwill impairment test. As the Company uses the market approach to assess impairment, its common stock price is an important component of the fair value calculation. The Company performed its annual impairment test during the quarter ended December 28, 2014 and determined that the fair value of its reporting unit was substantially in excess of its carrying value, and thus its goodwill was not impaired. As of March 29, 2015, no events or changes in circumstances indicate the carrying value may not be recoverable.
Intangible Assets	Intangible Assets
Intangible Assets	Intangible assets consist of developed technology and customer relationships, and in-process research and development resulting from the Company’s acquisition of MEMS microphone business of Analog Devices, Inc. (“ADI”) in fiscal 2014 and Movea S.A and Trusted Positioning, Inc. in fiscal 2015 (see note 8) as well as patents acquired in fiscal 2015. Acquired intangible assets that are subject to amortization are developed technology and customer relationships and are recorded at cost, net of accumulated amortization. Intangible assets are amortized on a straight-line basis over their estimated useful lives. In-process research and development capitalized during business combination is amortized only after successful completion of project, over the expected useful life.
Impairment of Long Lived Assets	Impairment of Long Lived Assets
Impairment of Long Lived Assets	The Company regularly reviews the carrying amount of its long-lived assets, including property and equipment and intangible assets, as well as the useful lives, to determine whether indicators of impairment may exist which warrant adjustments to carrying values or estimated useful lives. An impairment loss would be recognized when the sum of the expected future undiscounted net cash flows is less than the carrying amount of the asset. Should impairment exist, the impairment loss would be measured based on the excess of the carrying amount of the asset over the asset’s fair value.
Warranty	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 increased primarily due to an increase in unit sales volume and a commensurate increase in the volume of product returned under the warranty agreements. The accrual also includes management’s judgment regarding anticipated rates of warranty claims and associated repair costs.
Revenue Recognition	Revenue Recognition
	Revenue from the sale of the Company’s products is recognized when all of the following four criteria are met: (1) persuasive evidence of an arrangement exists; (2) the product has been delivered; (3) the price is fixed or determinable; and (4) collection is reasonably assured. Delivery takes place after the transfer of title which historically has occurred upon shipment of the product unless otherwise stated in the customer agreement.
	For direct customers (i.e., other than distributors), the Company recognizes revenue when title to the product is transferred to the customer, which occurs upon shipment or delivery, depending upon the terms of the customer order.
	The Company primarily enters into sales transactions with distributors in which the distributor is purchasing product for an identified end customer. For these transactions, the Company recognizes net revenue upon either shipment or delivery to the distributor, depending upon when title transfers under the terms of the order. Pursuant to the terms and conditions contained in the agreement with its distributors, all sales to distributors purchased for an identified end customer are non-refundable, do not have rights to return product purchases except under the Company’s standard warranty terms, and do not include any price concessions or price protection.
Research and Development	Research and Development
Research and Development	Research and development activities are expensed as incurred.
Stock-Based Compensation	Stock-Based Compensation
Stock-Based Compensation	The Company measures the cost of employee services received in exchange for equity incentive awards, including stock options, based on the grant date fair value of the award. The fair value is estimated using the Black-Scholes option pricing model. The Black-Scholes model requires us to estimate certain key assumptions including future stock price volatility, expected term of the options, risk free rates, and dividend yields. Certain of our stock-based awards contained a market-based condition for vesting; these awards were valued using a Monte Carlo simulation analysis to model and value multiple possible outcomes. The Company also estimates potential forfeiture of equity incentive awards granted and adjust compensation expense accordingly. The estimate of forfeitures is adjusted over the estimated term to the extent that the actual forfeiture rate or expected forfeiture rate is expected to differ from these estimates. The resulting cost is recognized over the period during which the employee is required to provide services in exchange for the award, which is usually the vesting period. The Company recognizes compensation expense over the vesting period using the straight-line method and classifies these amounts in the statements of income based on the department to which the related employee is assigned. See Note 6 “Stockholders’ Equity” for a description of our stock-based employee compensation plans and the assumptions the Company uses to calculate the fair value of stock-based employee compensation.
Income Taxes	Income Taxes
	The Company accounts for income taxes in accordance with ASC 740-10 “Income Taxes,” which requires the asset and liability approach and the recognition of taxes payable or receivable for the current year and deferred tax liabilities and assets for future tax consequences of events that have been recognized in the Company’s Consolidated Financial Statements and related Notes or tax returns. The measurement of current and deferred tax liabilities and assets are based on provisions of the enacted laws; the effects of future changes in tax laws or rates are not anticipated. Deferred tax assets are reduced, if necessary, by the amount of any tax benefits that, based on available evidence, are not expected to be realized. Valuation allowances are established when necessary to reduce deferred tax assets to the amount that is more likely than not to be realized.

	ASC 740-10 also prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. ASC 740-10 also provides guidance on de-recognition, classification, interest and penalties, accounting in interim periods, disclosure and transition. The Company’s policy is to recognize interest and penalties related to unrecognized tax benefits in income tax provision.
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.
Comprehensive Income (Loss)	Comprehensive Income (Loss)
Comprehensive Income (Loss)	Comprehensive income (loss) includes certain changes in equity that are excluded from net income. Specifically, unrealized gains and losses are included in accumulated other comprehensive income (loss). During fiscal 2015, fiscal 2014 and fiscal 2013, comprehensive income (loss) included a combination of the current period net income and unrealized gain (loss) on available for sale investments.
Segment Information	Segment Information
Segment Information	The Company operates in one operating segment by designing, developing, manufacturing and marketing sensor systems on a chip. The Chief Executive Officer has been identified as the Chief Operating Decision Maker as defined by Financial Accounting Standards Board’s ASC 280 “Segment Reporting”. Enterprise-wide information is provided in accordance with ASC 280. Geographical revenue information is based on the location of our customers’ head offices. Property and equipment information is based on the physical location of the assets at the end of each fiscal period.
Recent Accounting Pronouncements	Recent Accounting Pronouncements
	In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“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 standard requires public entities to apply the amendments in ASU 2014-09 for annual reporting periods beginning after December 15, 2016, including interim reporting periods therein. On April 1, 2015, the FASB proposed for a one-year deferral of the effective date for this pronouncement. The Company then will be required to implement the new revenue recognition standard for the first quarter of fiscal year 2019. The Company is currently evaluating the impact on its consolidated financial statements.
	On April 7, 2015, the FASB issued ASU 2015-03, Simplifying the Presentation of Debt Issuance Costs. ASU 2015-03 requires debt issuance costs to be presented in the balance sheet as a direct deduction from the carrying value of the associated debt liability, consistent with the presentation of a debt discount. For public business entities, the standard is effective for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. Early adoption is permitted for financial statements that have not been previously issued. The Company then will be required to implement the new revenue recognition standard for the first quarter of fiscal year 2017. 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)	12 Months Ended
	Mar. 29, 2015
Accounting Policies [Abstract]
Summary of Activity Related to Product Warranty Liability	The following table summarizes the activity related to the product warranty liability during fiscal 2015, fiscal 2014 and fiscal 2013:


		Fiscal Year
		2015			2014			2013
		(in thousands)
	Beginning balance	$	80		$	123		$	361
	Provision for warranty		221			59			60
	Adjustments related to changes in estimate		193			(71	)		(262	)
	Less: actual warranty costs		(153	)		(31	)		(36	)

	Ending balance	$	341		$	80		$	123

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:


		Fiscal Year
		2015			2014			2013
		(in thousands, except per share data)
	Numerator:
	Basic and Diluted
	Net income (loss)	$	(1,080	)	$	6,119		$	51,705

	Denominator:
	Basic shares:
	Weighted-average shares used in computing basic net income (loss) per share		89,359			86,520			82,738

	Diluted shares:
	Weighted-average shares used in computing basic net income (loss) per share		89,359			86,520			82,738
	Effect of potentially dilutive securities:
	Stock options and unvested restricted stock		—			3,367			4,445
	Common stock warrants		—			41			176

	Weighted-average shares used in computing diluted net income (loss) per share		89,359			89,928			87,359

	Net income (loss) per share
	Basic	$	(0.01	)	$	0.07		$	0.62
	Diluted	$	(0.01	)	$	0.07		$	0.59
Securities Excluded from Computation of Diluted Net Income 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 per common share for the periods presented as their effect would have been antidilutive:


		Fiscal Year
		2015			2014			2013
		(in thousands)
	Employee stock options		8,562			1,992			4,498
	Unvested restricted stock units		3,699			1,338			110

	Total antidilutive securities		12,261			3,330			4,608

Property and Equipment by Country	Property and equipment by country were as follows:


	Country	March 29,			March 30,
	Country	2015			2014
		(in thousands)
	Taiwan	$	31,334		$	16,902
	United States		9,442			7,605
	Other		1,073			732

		$	41,849		$	25,239

Net Revenues from Unaffiliated Customers by Country	Net revenues from unaffiliated customers by country were as follows:


		Fiscal Year
	Region	2015			2014			2013
		(in thousands)
	Korea	$	130,807		$	112,880		$	69,874
	United States		129,665			24,681			16,667
	China		65,115			43,796			14,742
	Japan		18,788			45,493			65,663
	Taiwan		21,264			18,737			39,203
	Rest of world		6,380			6,946			2,485

		$	372,019		$	252,533		$	208,634

Cash_Equivalents_and_Available1

Cash Equivalents and Available-for-sale Investments (Tables)	12 Months Ended
	Mar. 29, 2015
Cash and Cash Equivalents [Abstract]
Assets and Liabilities Measured at Fair Value on Recurring Basis	Assets and liabilities measured at fair value on a recurring basis were presented in the Company’s consolidated balance sheet as of March 29, 2015.


			March 29, 2015				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)
	Assets
	Money Market Funds		$	22,023			$	22,023		$	—			$	—
	Corporate Notes and Bonds			122,124				—			122,124				—
	Commercial Paper			6,991				—			6,991				—
	Municipal Notes and Bonds			302				—			302				—
	U.S. Agency Securities			2,502				—			2,502				—

	Total investments		$	153,942			$	22,023		$	131,919			$	—

	Liabilities
	Contingent consideration		$	9,124			$	—		$	—			$	9,124

	Assets
	Cash equivalents		$	24,023			$	24,023		$	—			$	—
	Short-term investments			129,919				—			129,919				—
	Long-term investments			—				—			—				—

	Total investments		$	153,942			$	24,023		$	129,919			$	—

	Liabilities
	Accrued liabilities		$	6,364										$	6,364
	Long-term liabilities			2,760											2,760

	Total contingent consideration		$	9,124			$	—		$	—			$	9,124


			March 29, 2015				Gross			Gross				March 29, 2015
			Amortized Cost				Unrealized			Unrealized				Estimated FMV
							Gain			Loss
	Corporate Notes and Bonds		$	122,131			$	22		$	(29	)		$	122,124
	Commercial Paper			6,992				—			(1	)			6,991
	Municipal Notes and Bonds			302				—			—				302
	U.S. Agency Securities			2,500				2			—				2,502

	Total Available-for-sale investments		$	131,925			$	24		$	(30	)		$	131,919

	Money Market Funds														22,023

	Total Aggregate Fair Value													$	153,942

	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, 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 fiscal 2015.

	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 30, 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


		30-Mar-14				Gross			Gross				30-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

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, 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 fiscal 2014.
Summary of Changes in Fair Value of Company's Contingent Consideration Categorized as Level 3	The following table provides a summary of changes in fair value of the Company’s contingent consideration categorized as Level 3 for the twelve months ended March 29, 2015:


			March 29, 2015
			(in thousands)
	Beginning balance		$	—
	Add: Contingent consideration in connection with acquisitions			16,034
	Payments made on contingent liabilities			(7,863	)
	Change in fair value and other			953

	Ending balance		$	9,124

Summary of Significant Unobservable Inputs used in Fair Value Measurement on Recurring Basis	The following table presents certain information about the significant unobservable inputs used in the fair value measurement for the contingent consideration measured at fair value on a recurring basis using significant unobservable inputs:


	Description		Valuation Techniques		Significant Unobservable Inputs
	Liabilities: Contingent consideration		Present value of a Probability Weighted Earn-out model using an appropriate discount rate.		Estimate of achieving the milestones.

Balance_Sheet_Details_Tables

Balance Sheet Details (Tables)	12 Months Ended
Balance Sheet Details (Tables)	Mar. 29, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Inventories	Inventories at March 29, 2015 and March 30, 2014 consist of the following:


		March 29, 2015			March 30, 2014
		(in thousands)
	Work in process	$	49,146		$	58,641
	Finished goods		25,959			14,391

	Total inventories	$	75,105		$	73,032

Prepaid Expenses and Other Current Assets	Prepaid expenses and other current assets at March 29, 2015 and March 30, 2014 consist of the following:


		March 29, 2015			March 30, 2014
		(in thousands)
	Prepaid expenses	$	4,280		$	3,495
	Income tax receivable		1,398			5,932
	Other receivables		2,675			5,356
	Deferred tax assets		5,127			2,487
	Other current assets		1,470			2,317

	Total prepaid expenses and other current assets	$	14,950		$	19,587

Property and Equipment	Property and Equipment
	Property and equipment at March 29, 2015 and March 30, 2014 consist of the following:


		March 29, 2015			March 30, 2014
		(in thousands)
	Production and lab equipment	$	47,107		$	25,890
	Computer equipment and software		6,044			4,335
	Equipment under construction		2,820			2,298
	Leasehold improvements and furniture and fixtures		7,163			3,918

	Subtotal		63,134			36,441
	Accumulated depreciation and amortization		(21,285	)		(11,202	)

	Property and equipment—net	$	41,849		$	25,239

Accrued Liabilities	Accrued liabilities at March 29, 2015 and March 30, 2014 consist of the following:


		March 29, 2015			March 30, 2014
		(in thousands)
	Contingent consideration, current portion	$	6,364		$	—
	Payroll-related expenses		7,197			4,207
	Bonuses		5,352			3,019
	Legal fees		921			2,527
	Accrued contractual coupon interest payable on convertible senior notes		1,252			1,158
	Deferred revenue		1,584			800
	Income tax payable		311			117
	Other tax payable		768			—
	Acquisition-related payable		1,380			—
	Other accrued liabilities		6,862			3,157

	Total accrued liabilities	$	31,991		$	14,985

Other Long-term Liabilities	Other long-term liabilities at March 29, 2015 and March 30, 2014 consist of the following:


		March 29, 2015			March 30, 2014
		(in thousands)
	Long-term tax payable	$	11,918		$	8,513
	Deferred tax liabilities		3,936			—
	Deferred revenue		3,400			1,200
	Deferred rent		3,630			1,662
	Contingent consideration, noncurrent portion		2,760			—
	Long-term debt		2,472			—
	Other long-term liabilities		136			—

	Total other long-term liabilities	$	28,252		$	11,375

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
Commitments and Contingencies (Tables)	Mar. 29, 2015
Commitments and Contingencies Disclosure [Abstract]
Future Minimum Lease Payments, Net of Future Minimum Lease Income under Operating Leases	Future minimum lease payments, net of future minimum lease income, under operating leases as of March 29, 2015 are as follows:


	Fiscal Years Ending:	Amount
		(in thousands)
	2016		5,425
	2017		5,865
	2018		6,292
	2019		6,409
	2020		5,049
	Beyond		1,501

	Total	$	30,541

Convertible_Senior_Notes_Table

Convertible Senior Notes (Tables)	12 Months Ended
Convertible Senior Notes (Tables)	Mar. 29, 2015
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):


		March 29, 2015		March 30, 2014
		(in thousands)
	Principal amount of the Notes	$	175,000	$	175,000
	Unamortized discount on the Notes		31,983		39,417

	Net carrying value	$	143,017	$	135,583

Schedule of Interest Expense Recognized Related to Notes	The following table presents the amount of interest expense recognized related to the Notes (in thousands):


		Fiscal Year
		2015		2014
		(in thousands)
	Contractual coupon interest expense	$	3,059	$	1,158
	Accretion of debt discount		7,435		2,835
	Amortization of debt issuance costs		51		19

	Total interest expense related to the Notes	$	10,545	$	4,012

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	12 Months Ended
Stockholders' Equity (Tables)	Mar. 29, 2015
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)
	Outstanding—April 1, 2012		9,710			11,116		$	4.31
	Increase to stock option pool		3,236
	Options granted		(4,057	)		4,057			12.13
	Exercised options		—			(3,369	)		1.67
	Cancelled options		1,309			(1,309	)		8.53

	Outstanding—March 31, 2013		10,198			10,495		$	7.65
	Increase to stock option pool		3,399
	Options granted		(1,578	)		1,578			16.14
	Exercised options		—			(3,221	)		4.47
	Cancelled options		576			(576	)		9.71

	Outstanding—March 30, 2014		12,595			8,276		$	10.37
	Increase to stock option pool		3,533			—			—
	Options granted		(1,916	)		1,916			19.22
	Exercised options					(1,421	)		6.5
	Cancelled options		464			(464	)		11.89

	Outstanding—March 29, 2015		14,676			8,307		$	12.99		7.6	$	29,817

	Vested and expected to vest—March 29, 2015					7,476		$	12.61		7.49	$	28,783
	Exercisable—March 29, 2015					3,634		$	9.89		6.68	$	21,006
Summary of Additional Information Regarding Options Outstanding	Additional information regarding options outstanding as of March 29, 2015 is as follows (in thousands except per share amounts):


		Options Outstanding								Options Exercisable
	Exercise	Number			Weighted-			Weighted-		Number		Weighted-
	Prices	Oustanding at			Average			Average Exercise		Exercisable at		Average Exercise
		March 29, 2015			Remaining			Price per Share		March 29,		Price per Share
		(in thousands)			Contractual Life					2015
					(in years)					(in thousands)
	$0.08 - $10.10		2,068			5.7		$	6.11		1,591	$	5.28
	$10.11 - $11.57		1,887			7.6		$	11.36		903	$	11.38
	$11.85 - $17.49		2,077			8.1		$	13.83		795	$	13.43
	$17.66 - $24.99		2,275			8.9		$	19.83		345	$	19.11

			8,307			7.6		$	12.99		3,634	$	9.89

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 option grants made during fiscal 2015, fiscal 2014 and fiscal 2013.


		Fiscal Year
		2015		2014	2013
	Expected term (in years)	4.5 - 5.0		4.7	5.4
	Volatility	41.4% - 45.9%		40.1% - 41.9%	42.7% - 48.5%
	Risk-free interest rate	1.4% - 1.6%		0.6% - 2.7%	0.6% - 1.3%
	Dividend rate	0%		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 units and restricted stock activities	Shares			Weighted Average
					Grant Date
					Fair Value Per Share
		(in thousands, except per share amount)
	Unvested at April 1, 2012		118		$	12.47
	Granted		750			12.08
	Released		(8	)		17.79
	Forfeited		(54	)		12.48

	Unvested at March 31, 2013		806			12.05
	Granted		2,952			17.28
	Released		(251	)		11.84
	Forfeited		(182	)		13.62

	Unvested at March 30, 2014		3,325			16.63
	Granted		1,989			19.01
	Released		(888	)		16.09
	Forfeited		(396	)		18.39

	Unvested at March 29, 2015		4,030		$	17.75

Summary of Total Stock-Based Compensation Cost	Total stock-based compensation costs for the Company’s stock plans for fiscal 2015, fiscal 2014 and fiscal 2013 are as follows:


		Fiscal Year
		2015			2014			2013
		(in thousands)
	Cost of revenue	$	2,520		$	1,296		$	649
	Research and development		14,183			6,218			2,753
	Selling, general and administrative		13,801			8,510			5,117

	Total stock-based compensation expense	$	30,504		$	16,024		$	8,519

Common Stock Reserved for Future Issuance	As of March 2015 and March 2014, common stock reserved for future issuance was as follows (in thousands):


	Common stock reserved for issuance	March 29, 2015,			March 30, 2014,
		(in thousands)
	Stock plans
	Outstanding stock options		8,307			8,276
	Outstanding restricted stock units and restricted stocks		4,030			3,325
	Reserved for future equity incentive grants		10,300			9,697

			22,637			21,298
	Employee Stock Purchase Plan		230			400
	Warrants to purchase common stock		7,995			7,995

	Total common stock reserved for future issuances		30,862			29,693

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
Income Taxes (Tables)	Mar. 29, 2015
Income Tax Disclosure [Abstract]
Components of Income Before Taxes	The components of income before taxes are as follows:


		Fiscal Year
		2015			2014			2013
		(in thousands)
	United States	$	(12,723	)	$	(3,817	)	$	11,883
	International		9,388			10,006			45,123

	Income (loss) before provision for income taxes	$	(3,335	)	$	6,189		$	57,006

Summary of Income Tax Expense	Income tax expense was comprised of the following:


		Fiscal Year
		2015			2014			2013
		(in thousands)
	Current
	Federal	$	468		$	1,658		$	5,553
	State		1			1			6
	International		3,843			179			142

	Total current		4,312			1,838			5,701

	Deferred
	Federal		(5,715	)		(1,856	)		(375	)
	State		—			—			(6	)
	International		(852	)		88			(19	)

	Total deferred		(6,567	)		(1,768	)		(400	)

	Income tax provision	$	(2,255	)	$	70		$	5,301

Schedule of Provision for Income Taxes Differs from Amount Computed by Applying Statutory Rates	The provision for income taxes differs from the amount computed by applying the statutory rates as follows:


		Fiscal Year
		2015			2014			2013
	Income tax provision at the federal statutory rate		35	%		35	%		35	%
	Research and development credits		90.7			(27.3	)		(2.1	)
	Foreign tax rate differential		(27.3	)		(22.0	)		(25.8	)
	Non deductible stock compensation		(27.3	)		19.5			2.2
	Other		(3.5	)		(4.1	)		—

	Effective tax rate		67.6	%		1.1	%		9.3	%

Summary of Components of Deferred Tax Asset	The components of the deferred tax asset are as follows:


		March 29, 2015			March 30, 2014
		(in thousands)
	Deferred tax assets:
	Accrued expenses and reserves	$	3,179		$	1,769
	Stock based compensation		4,081			2,167
	Research and development credits		8,418			4,115
	Net operating loss carryforwards		1,001			1,001

	Gross Deferred tax assets		16,679			9,052
	Valuation Allowance		(5,221	)		(3,761	)

	Deferred tax assets, net of valuation allowance		11,458			5,291

	Deferred tax liabilities:
	Fixed Assets		(175	)		(44	)
	Acquired Intangibles		(3,935	)		—

	Total deferred tax liabilities		(4,110	)		(44	)

	Deferred tax assets, net of valuation allowance and deferred tax liabilities	$	7,348		$	5,247

Reconciliation of Change in Unrecognized Tax Benefits	A reconciliation of the change in unrecognized tax benefits is as follows:


	(in thousands)
	Balance at April 1, 2012	$	3,855
	Increases in unrecognized tax benefits		3,961

	Balance at March 31, 2013		7,816
	Increases in unrecognized tax benefits		2,797

	Balance at March 30, 2014		10,613
	Increases arising from acquisitions		7,605
	Increases in unrecognized tax benefits		4,309

	Balance at March 29, 2015	$	22,527

Acquisition_Tables

Acquisition (Tables)	12 Months Ended
Acquisition (Tables)	Mar. 29, 2015
Summary of Unaudited Proforma of Combined Financial Information	The following unaudited pro forma financial information presents the combined results of operations of InvenSense and ADI as if the acquisition had occurred as of the beginning of fiscal 2014:


		Fiscal Year
		2014
		(in thousands)
	Net revenue	$	276,592
	Net income (loss)	$	4,051
Movea S.A [Member]
Summary of Purchase Price of Assets Acquired and Liabilities Assumed	The table below is a summary of the preliminary purchase price allocation of the fair value of assets acquired and liabilities assumed in connection with the acquisition of Movea (in thousands):


	Cash consideration	$	60,900
	Contingent consideration		8,400

		$	69,300

	Preliminary allocation of purchase price:
	Current assets	$	3,082
	Fixed assets		209
	Other non-current assets		592
	Developed technology		7,200
	Goodwill		68,330
	Current liabilities		(5,016	)
	Long-term liabilities		(5,097	)

	Total preliminary purchase price	$	69,300

Summary of Estimated Fair Value and Useful Lives of Intangible Assets	The following table presents certain information on acquired identifiable intangible assets related to the Movea acquisition:


		Estimated Fair Value			Estimated Useful Life
		(in thousands)			(in years)
	Developed technology	$	7,200			5
Summary of Unaudited Proforma of Combined Financial Information	The following unaudited pro forma financial information presents the combined results of operations of InvenSense and Movea as if the acquisition had occurred as of the beginning of fiscal 2014:


		Fiscal Year
		2015			2014
		(in thousands)
	Net revenue	$	372,693		$	255,709
	Net income (loss)	$	(4,097	)	$	(800	)
Trusted Positioning, Inc. [Member]
Summary of Purchase Price of Assets Acquired and Liabilities Assumed	The table below is a summary of the preliminary purchase price allocation for the 100% equity interest of the fair value of assets acquired and liabilities assumed in connection with the acquisition of TPI (in thousands):


	Cash consideration	$	11,379
	Issuance of common stock		5,703
	Contingent consideration		7,634
	Fair value of previously held 4.57% equity interest		1,215

		$	25,931

	Preliminary allocation of purchase price:
	Current assets	$	392
	Fixed assets		50
	Other non-current assets		546
	Developed technology		8,600
	Goodwill		19,893
	Current liabilities		(1,247	)
	Long-term liabilities		(2,303	)

	Total preliminary purchase price	$	25,931

Summary of Estimated Fair Value and Useful Lives of Intangible Assets	The following table presents certain information on acquired identifiable intangible assets related to the TPI acquisition:


		Estimated Fair Value			Estimated Useful Life
		(in thousands)			(in years)
	Developed technology	$	8,600			5
Analog Devices, Inc. [Member]
Summary of Purchase Price of Assets Acquired and Liabilities Assumed	The allocation of the purchase price of the assets acquired and liabilities assumed based on their fair values was as follows:


		Total Amount
		(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 Estimated Fair Value and Useful Lives of Intangible Assets	The table below presents certain information on acquired identifiable intangible assets related to the ADI acquisition:


		Estimated Fair Value			Estimated Useful Life
		(in thousands)			(in years)
	Developed technology	$	28,520		6
	Customer relationships	$	1,560		7
	In-Process Research & Development	$	7,330		5-Mar

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	12 Months Ended
Goodwill and Intangible Assets (Tables)	Mar. 29, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Activity Related to Carrying Value of Goodwill	The following table summarizes the activity related to the carrying value of goodwill (in thousands):


	Balance as of March 30, 2014	$	50,952
	Goodwill recorded in connection with the acquisition of Movea S.A		68,330
	Goodwill recorded in connection with the acquisition of Trusted Positioning, Inc.		19,893

	Balance as of March 29, 2015	$	139,175

Summary of Intangible Assets and Accumulated Amortization	The following table represents intangible assets and accumulated amortization:


		March 29, 2015
		Gross		Accumulated		Net
		Gross		Amortization		Net
		(in thousands)
	Developed technology	$	44,320	$	8,697	$	35,623
	Customer relationships		1,560		316		1,244
	Patents		2,120		39		2,081

	Total intangible assets subject to amortization	$	48,000	$	9,052	$	38,948



		March 30, 2014
		Gross		Accumulated		Net
		Gross		Amortization		Net
		(in thousands)
	Developed technology	$	28,520	$	1,980	$	26,540
	Customer relationships		1,560		93		1,467

	Total intangible assets subject to amortization	$	30,080	$	2,073	$	28,007

Estimated Future Amortization Expense Related to Intangible Assets	The estimated future amortization expense related to intangible assets at March 29, 2015, is as follows:


	Fiscal Year	Estimated
		Amortization
		(in thousands)
	2016		8,607
	2017		8,607
	2018		8,607
	2019		8,607
	2020		4,390
	Thereafter		130

	Total	$	38,948

Quarterly_Financial_Data_Unaud1

Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
Quarterly Financial Data (Unaudited) (Tables)	Mar. 29, 2015
Quarterly Financial Information Disclosure [Abstract]
Summary of Quarterly Financial Data
	Fiscal Year 2015:	Three Months Ended
		June 29,			September 28,			December 28,			March 29,
		2014			2014			2014			2015
	Net revenue	$	66,681		$	90,195		$	115,864		$	99,279
	Costs of revenue		35,505			58,854			65,468			56,333

	Gross profit		31,176			31,341			50,396			42,946
	Operating expenses:
	Research and development		19,408			21,593			24,391			25,231
	Selling, general and administrative		13,918			14,592			15,551			15,325

	Total operating expenses		33,326			36,185			39,942			40,556

	Income (loss) from operations		(2,150	)		(4,844	)		10,454			2,390
	Interest (expense)		(2,584	)		(2,620	)		(2,690	)		(2,659	)
	Other income (expense), net		181			1,199			(281	)		269

	Income (loss) before income taxes		(4,553	)		(6,265	)		7,483			—
	Income tax provision (benefit)		279			603			(2,738	)		(399	)

	Net income (loss)	$	(4,832	)	$	(6,868	)	$	10,221		$	399

	Net income (loss) per share of common stock:
	Basic	$	(0.05	)	$	(0.08	)	$	0.11		$	0

	Diluted	$	(0.05	)	$	(0.08	)	$	0.11		$	0

	Weighted average shares outstanding used in computing net income (loss) per share:
	Basic		88,302			88,997			89,779			90,359

	Diluted		88,302			89,928			92,336			92,619



	Fiscal Year 2014:	Three Months Ended
		June 30,			September 29,			December 29,			March 30,
		2013			2013			2013			2014
	Net revenue	$	55,910		$	70,941		$	66,684		$	58,998
	Costs of revenue		26,591			34,364			35,094			31,675

	Gross profit		29,319			36,577			31,590			27,323
	Operating expenses:
	Research and development		8,114			9,810			14,522			15,985
	Selling, general and administrative		9,155			11,424			15,663			15,102
	Litigation settlement		—			—			14,500			500

	Total operating expenses		17,269			21,234			44,685			31,587

	Income (loss) from operations		12,050			15,343			(13,095	)		(4,264	)
	Interest (expense)		—			—			(1,464	)		(2,548	)
	Other income (expense), net		80			210			(219	)		96

	Income (loss) before income taxes		12,130			15,553			(14,778	)		(6,716	)
	Income tax provision (benefit)		1,808			1,945			(2,599	)		(1,084	)

	Net income (loss)	$	10,322		$	13,608		$	(12,179	)	$	(5,632	)

	Net income (loss) per share of common stock:
	Basic	$	0.12		$	0.16		$	(0.14	)	$	(0.06	)

	Diluted	$	0.12		$	0.15		$	(0.14	)	$	(0.06	)

	Weighted average shares outstanding used in computing net income (loss) per share:
Basic		85,038			86,289			87,047			87,691

Diluted		87,914			89,778			87,047			87,691

Organization_and_Summary_of_Si3

Organization and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Dec. 28, 2014	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013	Nov. 30, 2013
	Dec. 28, 2014	Segment	Mar. 30, 2014	Mar. 31, 2013	Nov. 30, 2013
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Incorporation month and year		2003-06
Foreign currency losses		$198,000	$260,000	$51,000
Other than temporary impairments		0	0	0
Allowance for doubtful accounts			0	0
Bad debt expenses		26,000
Incurred charges related to reserve for sales returns and allowances		357,000	134,000	84,000
Balances for the reserve for sales returns and allowances		57,000	91,000
Inventory Write-down amount		8,600,000		-3,000,000
Goodwill impairment	0
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, conversion ratio		45.683
Convertible senior notes, face amount per note		1,000
Convertible senior notes, conversion price		$21.89
Number of operating segments		1
Leasehold Improvements [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful lives for leasehold improvements		Over the shorter of the estimated useful life or the remaining lease term.
Minimum [Member] \| Production Equipment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful lives		4 years
Minimum [Member] \| Lab Equipment, Computer Equipment and Software [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful lives		3 years
Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Period of Company's warranty agreements		3 years
Maximum [Member] \| Production Equipment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful lives		5 years
Maximum [Member] \| Lab Equipment, Computer Equipment and Software [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful lives		5 years
Convertible Senior Notes Due 2018 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Convertible senior notes, principal amount					$175,000,000
Convertible senior notes, Stated interest rate		1.75%			1.75%
Revenue [Member] \| Customer Concentration Risk [Member] \| Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of concentration risk		10.00%
Accounts Receivable [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of major distributors		1
Number of major customers		1	3
Accounts Receivable [Member] \| Credit Concentration Risk [Member] \| Distributor [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of concentration risk		38.00%
Accounts Receivable [Member] \| Credit Concentration Risk [Member] \| Customer [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of concentration risk		26.00%
Accounts Receivable [Member] \| Credit Concentration Risk [Member] \| Customer One [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of concentration risk			28.00%
Accounts Receivable [Member] \| Credit Concentration Risk [Member] \| Customer Two [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of concentration risk			19.00%
Accounts Receivable [Member] \| Credit Concentration Risk [Member] \| Customer Three [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of concentration risk			19.00%
Accounts Receivable [Member] \| Credit Concentration Risk [Member] \| Other Customers [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of major customers		0	0
Accounts Receivable [Member] \| Credit Concentration Risk [Member] \| Other Customers [Member] \| Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of concentration risk		10.00%	10.00%
Net Revenue [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of major distributors		1
Net Revenue [Member] \| Customer Concentration Risk [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of major customers		1	1	3
Net Revenue [Member] \| Customer Concentration Risk [Member] \| Distributor [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of concentration risk		30.00%
Net Revenue [Member] \| Customer Concentration Risk [Member] \| Customer [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of concentration risk		28.00%
Net Revenue [Member] \| Customer Concentration Risk [Member] \| Customer One [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of concentration risk			35.00%	24.00%
Net Revenue [Member] \| Customer Concentration Risk [Member] \| Customer Two [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of concentration risk				18.00%
Net Revenue [Member] \| Customer Concentration Risk [Member] \| Customer Three [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of concentration risk				11.00%
Net Revenue [Member] \| Customer Concentration Risk [Member] \| Other Customers [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of major customers		0	0	0
Net Revenue [Member] \| Customer Concentration Risk [Member] \| Other Customers [Member] \| Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of concentration risk		10.00%	10.00%	10.00%

Organization_and_Summary_of_Si4

Organization and Summary of Significant Accounting Policies - Summary of Activity Related to Product Warranty Liability (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Beginning balance	$80	$123	$361
Provision for warranty	221	59	60
Adjustments related to changes in estimate	193	-71	-262
Less: actual warranty costs	-153	-31	-36
Ending balance	$341	$80	$123

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								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 29, 2015	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Basic and Diluted
Net income (loss)	$399	$10,221	($6,868)	($4,832)	($5,632)	($12,179)	$13,608	$10,322	($1,080)	$6,119	$51,705
Basic shares:
Weighted-average shares used in computing basic net income (loss) per share	90,359	89,779	88,997	88,302	87,691	87,047	86,289	85,038	89,359	86,520	82,738
Diluted shares:
Weighted-average shares used in computing basic net income (loss) per share	90,359	89,779	88,997	88,302	87,691	87,047	86,289	85,038	89,359	86,520	82,738
Effect of potentially dilutive securities:
Stock options and unvested restricted stock										3,367	4,445
Common stock warrants										41	176
Weighted-average shares used in computing diluted net income (loss) per share	92,619	92,336	89,928	88,302	87,691	87,047	89,778	87,914	89,359	89,928	87,359
Net income (loss) per share
Basic	$0	$0.11	($0.08)	($0.05)	($0.06)	($0.14)	$0.16	$0.12	($0.01)	$0.07	$0.62
Diluted	$0	$0.11	($0.08)	($0.05)	($0.06)	($0.14)	$0.15	$0.12	($0.01)	$0.07	$0.59

Organization_and_Summary_of_Si6

Organization and Summary of Significant Accounting Policies - Securities Excluded from Computation of Diluted Net Income Per Common Share (Detail)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total antidilutive securities	12,261	3,330	4,608
Employee Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total antidilutive securities	8,562	1,992	4,498
Unvested Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total antidilutive securities	3,699	1,338	110

Organization_and_Summary_of_Si7

Organization and Summary of Significant Accounting Policies - Property and Equipment by Country (Detail) (USD $)	Mar. 29, 2015	Mar. 30, 2014
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$41,849	$25,239
Taiwan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	31,334	16,902
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	9,442	7,605
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$1,073	$732

Organization_and_Summary_of_Si8

Organization and Summary of Significant Accounting Policies - Net Revenues from Unaffiliated Customers by Country (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2015	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues from unaffiliated customers	$99,279	$115,864	$90,195	$66,681	$58,998	$66,684	$70,941	$55,910	$372,019	$252,533	$208,634
Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues from unaffiliated customers									130,807	112,880	69,874
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues from unaffiliated customers									129,665	24,681	16,667
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues from unaffiliated customers									65,115	43,796	14,742
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues from unaffiliated customers									18,788	45,493	65,663
Taiwan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues from unaffiliated customers									21,264	18,737	39,203
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues from unaffiliated customers									$6,380	$6,946	$2,485

Cash_Equivalents_and_Available2

Cash Equivalents and Available-for-sale Investments - Additional Information (Detail) (USD $)	12 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013	Apr. 01, 2012
Cash and Cash Equivalents [Line Items]
Cash	$61,600,000	$15,300,000
Cash equivalents	24,000,000
Cash and cash equivalents	85,637,000	26,025,000	100,843,000	153,643,000
Short-term investments available-for-sale	129,900,000	91,300,000
Long-term investments available-for-sale		128,800,000
Investments available-for-sale total		220,100,000
Transfers of assets measured at fair value between Level 1 and Level 2	0	0
Increase in estimated fair value of contingent consideration liability on meeting certain milestones	953,000
Money Market Funds [Member]
Cash and Cash Equivalents [Line Items]
Cash equivalents	22,000,000	10,700,000
Corporate Debt [Member]
Cash and Cash Equivalents [Line Items]
Cash equivalents	2,000,000
Minimum [Member]
Cash and Cash Equivalents [Line Items]
Investment maturity period	1 Year
Maximum [Member]
Cash and Cash Equivalents [Line Items]
Investment maturity period	2 Years
Foreign Subsidiaries [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	47,700,000
Foreign Subsidiaries [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents		$9,800,000

Cash_Equivalents_and_Available3

Cash Equivalents and Available-for-sale Investments - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)	Mar. 29, 2015	Mar. 30, 2014
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Liabilities
Estimated FMV	$129,919	$91,307
Fair Value, Recurring [Member]
Assets
Fair value of assets	153,942	230,719
Fair value of assets	153,942	230,719
Liabilities
Accrued liabilities	9,124
Assets
Fair value of assets	153,942	230,719
Liabilities
Accrued liabilities	9,124
Amortized Cost	131,925	220,121
Gross Unrealized Gain	24	9
Gross Unrealized Loss	-30	-68
Estimated FMV	131,919	220,062
Fair Value, Recurring [Member] \| Accrued Liabilities [Member]
Liabilities
Accrued liabilities	6,364
Liabilities
Accrued liabilities	6,364
Fair Value, Recurring [Member] \| Long-term Liabilities [Member]
Liabilities
Accrued liabilities	2,760
Liabilities
Accrued liabilities	2,760
Fair Value, Recurring [Member] \| Short-term Investments [Member]
Assets
Fair value of assets	129,919	91,307
Fair value of assets	129,919	91,307
Assets
Fair value of assets	129,919	91,307
Fair Value, Recurring [Member] \| Long-term Investments [Member]
Assets
Fair value of assets		128,755
Fair value of assets		128,755
Assets
Fair value of assets		128,755
Fair Value, Recurring [Member] \| Money Market Funds [Member]
Assets
Fair value of assets	22,023	10,657
Fair value of assets	22,023	10,657
Assets
Fair value of assets	22,023	10,657
Fair Value, Recurring [Member] \| Corporate Notes and Bonds [Member]
Assets
Fair value of assets	122,124	204,683
Fair value of assets	122,124	204,683
Assets
Fair value of assets	122,124	204,683
Liabilities
Amortized Cost	122,131	204,747
Gross Unrealized Gain	22
Gross Unrealized Loss	-29	-64
Estimated FMV	122,124	204,683
Fair Value, Recurring [Member] \| Municipal Notes and Bonds [Member]
Assets
Fair value of assets	302	3,895
Fair value of assets	302	3,895
Assets
Fair value of assets	302	3,895
Liabilities
Amortized Cost	302	3,888
Gross Unrealized Gain		7
Estimated FMV	302	3,895
Fair Value, Recurring [Member] \| Commercial Paper [Member]
Assets
Fair value of assets	6,991	8,988
Fair value of assets	6,991	8,988
Assets
Fair value of assets	6,991	8,988
Liabilities
Amortized Cost	6,992	8,986
Gross Unrealized Gain		2
Gross Unrealized Loss	-1
Estimated FMV	6,991	8,988
Fair Value, Recurring [Member] \| U.S. Agency Securities [Member]
Assets
Fair value of assets	2,502	2,496
Fair value of assets	2,502	2,496
Assets
Fair value of assets	2,502	2,496
Liabilities
Amortized Cost	2,500	2,500
Gross Unrealized Gain	2
Gross Unrealized Loss		-4
Estimated FMV	2,502	2,496
Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Assets
Fair value of assets	24,023	10,657
Fair value of assets	24,023	10,657
Assets
Fair value of assets	24,023	10,657
Fair Value, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Assets
Fair value of assets	22,023	10,657
Fair value of assets	22,023	10,657
Assets
Fair value of assets	22,023	10,657
Fair Value, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets Level 1 [Member] \| Money Market Funds [Member]
Assets
Fair value of assets	22,023	10,657
Fair value of assets	22,023	10,657
Assets
Fair value of assets	22,023	10,657
Fair Value, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets Level 1 [Member] \| Cash Equivalents [Member]
Assets
Fair value of assets	24,023	10,657
Fair value of assets	24,023	10,657
Assets
Fair value of assets	24,023	10,657
Fair Value, Recurring [Member] \| Significant Other Observable Inputs Level 2 [Member]
Assets
Fair value of assets	131,919	220,062
Fair value of assets	131,919	220,062
Assets
Fair value of assets	131,919	220,062
Fair Value, Recurring [Member] \| Significant Other Observable Inputs Level 2 [Member] \| Short-term Investments [Member]
Assets
Fair value of assets	129,919	91,307
Fair value of assets	129,919	91,307
Assets
Fair value of assets	129,919	91,307
Fair Value, Recurring [Member] \| Significant Other Observable Inputs Level 2 [Member] \| Long-term Investments [Member]
Assets
Fair value of assets		128,755
Fair value of assets		128,755
Assets
Fair value of assets		128,755
Fair Value, Recurring [Member] \| Significant Other Observable Inputs Level 2 [Member] \| Corporate Notes and Bonds [Member]
Assets
Fair value of assets	122,124	204,683
Fair value of assets	122,124	204,683
Assets
Fair value of assets	122,124	204,683
Fair Value, Recurring [Member] \| Significant Other Observable Inputs Level 2 [Member] \| Municipal Notes and Bonds [Member]
Assets
Fair value of assets	302	3,895
Fair value of assets	302	3,895
Assets
Fair value of assets	302	3,895
Fair Value, Recurring [Member] \| Significant Other Observable Inputs Level 2 [Member] \| Commercial Paper [Member]
Assets
Fair value of assets	6,991	8,988
Fair value of assets	6,991	8,988
Assets
Fair value of assets	6,991	8,988
Fair Value, Recurring [Member] \| Significant Other Observable Inputs Level 2 [Member] \| U.S. Agency Securities [Member]
Assets
Fair value of assets	2,502	2,496
Fair value of assets	2,502	2,496
Assets
Fair value of assets	2,502	2,496
Fair Value, Recurring [Member] \| Significant Other Unobservable Inputs Level 3 [Member]
Assets
Fair value of assets
Fair value of assets
Liabilities
Accrued liabilities	9,124
Assets
Fair value of assets
Liabilities
Accrued liabilities	9,124
Fair Value, Recurring [Member] \| Significant Other Unobservable Inputs Level 3 [Member] \| Accrued Liabilities [Member]
Liabilities
Accrued liabilities	6,364
Liabilities
Accrued liabilities	6,364
Fair Value, Recurring [Member] \| Significant Other Unobservable Inputs Level 3 [Member] \| Long-term Liabilities [Member]
Liabilities
Accrued liabilities	2,760
Liabilities
Accrued liabilities	2,760
Fair Value, Recurring [Member] \| Significant Other Unobservable Inputs Level 3 [Member] \| Short-term Investments [Member]
Assets
Fair value of assets
Fair value of assets
Assets
Fair value of assets
Fair Value, Recurring [Member] \| Significant Other Unobservable Inputs Level 3 [Member] \| Long-term Investments [Member]
Assets
Fair value of assets
Fair value of assets
Assets
Fair value of assets
Fair Value, Recurring [Member] \| Significant Other Unobservable Inputs Level 3 [Member] \| Money Market Funds [Member]
Assets
Fair value of assets
Fair value of assets
Assets
Fair value of assets
Fair Value, Recurring [Member] \| Significant Other Unobservable Inputs Level 3 [Member] \| Corporate Notes and Bonds [Member]
Assets
Fair value of assets
Fair value of assets
Assets
Fair value of assets
Fair Value, Recurring [Member] \| Significant Other Unobservable Inputs Level 3 [Member] \| Municipal Notes and Bonds [Member]
Assets
Fair value of assets
Fair value of assets
Assets
Fair value of assets
Fair Value, Recurring [Member] \| Significant Other Unobservable Inputs Level 3 [Member] \| Commercial Paper [Member]
Assets
Fair value of assets
Fair value of assets
Assets
Fair value of assets
Fair Value, Recurring [Member] \| Significant Other Unobservable Inputs Level 3 [Member] \| U.S. Agency Securities [Member]
Assets
Fair value of assets
Fair value of assets
Assets
Fair value of assets
Fair Value, Recurring [Member] \| Significant Other Unobservable Inputs Level 3 [Member] \| Cash Equivalents [Member]
Assets
Fair value of assets
Fair value of assets
Assets
Fair value of assets

Cash_Equivalents_and_Available4

Cash Equivalents and Available-for-sale Investments - Summary of Changes in Fair Value of Company's Contingent Consideration Categorized as Level 3 (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2015
Fair Value Disclosures [Abstract]
Beginning balance	$0
Add: Contingent consideration in connection with acquisitions	16,034
Payments made on contingent liabilities	-7,863
Change in fair value and other	953
Ending balance	$9,124

Cash_Equivalents_and_Available5

Cash Equivalents and Available-for-sale Investments - Summary of Significant Unobservable Inputs used in Fair Value Measurement on Recurring Basis (Detail)	12 Months Ended
	Mar. 29, 2015
Fair Value Disclosures [Abstract]
Valuation techniques, Description	Present value of a Probability Weighted Earn-out model using an appropriate discount rate.
Significant unobservable inputs, Description	Estimate of achieving the milestones.

Balance_Sheet_Details_Inventor

Balance Sheet Details - Inventories (Detail) (USD $)	Mar. 29, 2015	Mar. 30, 2014
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Inventory Disclosure [Abstract]
Work in process	$49,146	$58,641
Finished goods	25,959	14,391
Total inventories	$75,105	$73,032

Balance_Sheet_Details_Prepaid_

Balance Sheet Details - Prepaid Expenses and Other Current Assets (Detail) (USD $)	Mar. 29, 2015	Mar. 30, 2014
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Balance Sheet Related Disclosures [Abstract]
Prepaid expenses	$4,280	$3,495
Income tax receivable	1,398	5,932
Other receivables	2,675	5,356
Deferred tax assets	5,127	2,487
Other current assets	1,470	2,317
Total prepaid expenses and other current assets	$14,950	$19,587

Balance_Sheet_Details_Property

Balance Sheet Details - Property and Equipment (Detail) (USD $)	Mar. 29, 2015	Mar. 30, 2014
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Property, Plant and Equipment [Line Items]
Subtotal	$63,134	$36,441
Accumulated depreciation and amortization	-21,285	-11,202
Property and equipment-net	41,849	25,239
Production and Lab Equipment [Member]
Property, Plant and Equipment [Line Items]
Subtotal	47,107	25,890
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Subtotal	6,044	4,335
Equipment Under Construction [Member]
Property, Plant and Equipment [Line Items]
Subtotal	2,820	2,298
Leasehold Improvements and Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Subtotal	$7,163	$3,918

Balance_Sheet_Details_Addition

Balance Sheet Details - Additional Information (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Balance Sheet Related Disclosures [Abstract]
Depreciation expense	$10,203	$4,492	$1,998

Balance_Sheet_Details_Accrued_

Balance Sheet Details - Accrued Liabilities (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Accrued Liabilities [Line Items]
Contingent consideration, current portion	$6,364
Payroll-related expenses	7,197	4,207
Bonuses	5,352	3,019
Legal fees	921	2,527
Deferred revenue	1,584	800
Income tax payable	311	117
Other tax payable	768
Acquisition-related payable	1,380
Other accrued liabilities	6,862	3,157
Total accrued liabilities	31,991	14,985
Convertible Senior Notes [Member]
Accrued Liabilities [Line Items]
Accrued contractual coupon interest payable on convertible senior notes	$1,252	$1,158

Balance_Sheet_Details_Other_Lo

Balance Sheet Details - Other Long-term Liabilities (Detail) (USD $)	Mar. 29, 2015	Mar. 30, 2014
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Other Liabilities Disclosure [Abstract]
Long-term tax payable	$11,918	$8,513
Deferred tax liabilities	3,936
Deferred revenue	3,400	1,200
Deferred rent	3,630	1,662
Contingent consideration, noncurrent portion	2,760
Long-term debt	2,472
Other long-term liabilities	136
Total other long-term liabilities	$28,252	$11,375

Commitments_and_Contingencies_1

Commitments and Contingencies - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended		12 Months Ended
	Feb. 09, 2014	Mar. 30, 2014	Dec. 29, 2013	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
	Feb. 09, 2014	Mar. 30, 2014	Dec. 29, 2013	Claim	Mar. 30, 2014	Mar. 31, 2013
Other Commitments [Line Items]
Non-cancelable operating leases terms				The Company has non-cancelable operating leases for its facilities through fiscal year 2022.
Operating leases, expiration date				2022
Rental expense				$5,200,000	$5,600,000	$2,000,000
Rental income from sublease				300,000	0	0
Future minimum payments under purchase commitments				50,800,000
Contributions				200,000	43,000
Patent infringement complaints filed dates, description				On May 16, 2012, and again on March 11, 2013 STMicroelectronics, Inc. ("STMicro") filed patent infringement complaints against us, alleging infringement of certain of their patents (collectively, the "Asserted Patents").
Minimum number of claims of Asserted Patents				1
Litigation and proceedings settlement	15,000,000
Pre-tax charge		500,000	14,500,000		15,000,000
Indemnification costs				$0		$0
ST Microelectronics Patent Litigation I [Member]
Other Commitments [Line Items]
Patent infringement complaints filed date				16-May-12
ST Microelectronics Patent Litigation II [Member]
Other Commitments [Line Items]
Patent infringement complaints filed date				11-Mar-13

Commitments_and_Contingencies_2

Commitments and Contingencies - Future Minimum Lease Payments, Net of Future Minimum Lease Income under Operating Leases (Detail) (USD $)	Mar. 29, 2015
In Thousands, unless otherwise specified	Mar. 29, 2015
Leases [Abstract]
2016	$5,425
2017	5,865
2018	6,292
2019	6,409
2020	5,049
Beyond	1,501
Total	$30,541

Convertible_Senior_Notes_Addit

Convertible Senior Notes - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended			0 Months Ended
Share data in Millions, except Per Share data, unless otherwise specified	Nov. 30, 2013	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013	Nov. 07, 2013
	Nov. 30, 2013	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013	Hedge_Strategies
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, 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	169,300,000		169,259,000
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
Convertible senior notes, conversion price		$21.89
Convertible senior notes, face amount per note		1,000
Convertible senior notes, conversion ratio		45.683
Notes issued		135,700,000
Convertible senior notes, debt discount		39,300,000
Non-convertible debt borrowing rate		7.30%
Convertible senior notes, remaining amortization period		3 years 7 months 6 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%
Aggregate price for convertible note hedge			39,118,000
Proceeds from sale of warrants			25,643,000	-390,000
Convertible Notes Hedges Purchased [Member]
Debt Instrument [Line Items]
Call options					8
Common stock at exercise price					$21.89
Conversion of shares in convertible note					0.045683
Aggregate price for convertible note hedge					39,100,000
Significant Other Observable Inputs Level 2 [Member]
Debt Instrument [Line Items]
Fair value of convertible notes		169,500,000
Call Options [Member]
Debt Instrument [Line Items]
Call options					8
Common stock at exercise price					$28.66
Proceeds from sale of warrants					25,600,000
Convertible Senior Notes Due 2018 [Member]
Debt Instrument [Line Items]
Convertible senior notes, principal amount	175,000,000
Convertible senior notes, Stated interest rate	1.75%	1.75%
Equity Component [Member]
Debt Instrument [Line Items]
Convertible senior notes, issuance cost		2,500,000
Debt Discount [Member]
Debt Instrument [Line Items]
Convertible senior notes, issuance cost		3,000,000
Other Non-current Assets [Member]
Debt Instrument [Line Items]
Convertible senior notes, issuance cost		250,000
Coupon Rate Plus [Member]
Debt Instrument [Line Items]
Convertible senior notes, effective interest rate		1.75%
Non-Cash Accretion Expense [Member]
Debt Instrument [Line Items]
Convertible senior notes, effective interest rate		6.09%
Condition One [Member]
Debt Instrument [Line Items]
Threshold trading days		20
Threshold consecutive trading days		30 days
Threshold percentage of conversion price		130.00%
Convertible senior notes, conversion price		$21.89
Second Condition [Member]
Debt Instrument [Line Items]
Threshold trading days		5
Threshold consecutive trading days		5 days
Threshold percentage of conversion price		98.00%
Convertible senior notes, face amount per note		$1,000

Convertible_Senior_Notes_Summa

Convertible Senior Notes - Summary of Principal Amounts and Related Unamortized Discount on Notes (Detail) (USD $)	Mar. 29, 2015	Mar. 30, 2014
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Debt Disclosure [Abstract]
Principal amount of the Notes	$175,000	$175,000
Unamortized discount on the Notes	31,983	39,417
Net carrying value	$143,017	$135,583

Convertible_Senior_Notes_Sched

Convertible Senior Notes - Schedule of Interest Expense Recognized Related to Notes (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Debt Disclosure [Abstract]
Contractual coupon interest expense	$3,059	$1,158
Accretion of debt discount	7,435	2,835
Amortization of debt issuance costs	51	19
Total interest expense related to the Notes	$10,545	$4,012

Stockholders_Equity_Additional

Stockholders' Equity - Additional Information (Detail) (USD $)	12 Months Ended			1 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013	Jul. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options vesting period			10 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	$20,100,000	$39,400,000	$36,100,000
Unamortized stock-based compensation expense, reduced for estimated forfeitures and related to non-vested options	17,600,000
Weighted average fair value of stock options granted per share	$7.16	$5.90	$5.12
Shares of the granted options that were exercisable	3,634,000
Number of options exercised	1,421,000	3,221,000	3,369,000
Shares reserved for issuance under the Purchase Plan	30,862,000	29,693,000
Compensation expense recognized	30,504,000	16,024,000	8,519,000
Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options vesting period			4 years
Number of shares to be purchased under granted options			622,115
Price per shares to be purchased under granted options			$11.57
Minimum stock price cross thresholds, one			$15
Minimum stock price cross thresholds, two			$17.50
Minimum stock price cross thresholds, three			$20
Shares of the granted options that were exercisable	212,000
Number of days to determine closing price under condition			20 days
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Company's common stock for owners, more than	10.00%
Stock options vesting period			5 years
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options vesting period			6 years 2 months 12 days
2011 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock outstanding percentage				4.00%
Increase and decrease of common stock				3,500,000
2013 Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
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	170,000
Shares reserved for issuance under the Purchase Plan	230,000	400,000
Compensation expense recognized	900,000	200,000
Restricted Stock Units and Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized expense of stock option, period for recognition	2 years 10 months 24 days
Total unrecognized compensation cost	47,700,000
Employee Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options vesting period	4 years
Unrecognized expense of stock option, period for recognition	2 years 4 months 24 days
Assumptions in estimating the fair value of the shares, expected dividends	0.00%	0.00%	0.00%
Market-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized stock-based compensation expense, reduced for estimated forfeitures and related to non-vested options	$700,000
Unrecognized expense of stock option, period for recognition	4 years
Assumptions in estimating the fair value of the shares, expected volatility			46.50%
Assumptions in estimating the fair value of the shares, expected dividends			0.00%
Assumptions in estimating the fair value of the shares, risk-free rate			0.80%
Number of options exercised	0	0	0
Market-Based Awards [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value of stock options granted per share			$4.87

Stockholders_Equity_Stock_Opti

Stockholders' Equity - Stock Option Activities (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Options Available for Grant, Beginning Balance	12,595	10,198	9,710
Options Available for Grant, Increase to stock option pool	3,533	3,399	3,236
Options Available for Grant, Options granted	-1,916	-1,578	-4,057
Options Available for Grant, Options exercised	0	0	0
Options Available for Grant, Options canceled	464	576	1,309
Options Available for Grant, Ending Balance	14,676	12,595	10,198
Options Issued and Outstanding, Beginning Balance	8,276	10,495	11,116
Options Issued and Outstanding, Options granted	1,916	1,578	4,057
Options Issued and Outstanding, Options exercised	-1,421	-3,221	-3,369
Options Issued and Outstanding, Options canceled	-464	-576	-1,309
Options Issued and Outstanding, Ending Balance	8,307	8,276	10,495
Weighted-Average Exercise Price, Beginning Balance	$10.37	$7.65	$4.31
Options Issued and Outstanding, Vested and expected to vest	7,476
Weighted-Average Exercise Price, Options granted	$19.22	$16.14	$12.13
Options Issued and Outstanding, Exercisable	3,634
Weighted-Average Exercise Price, Options exercised	$6.50	$4.47	$1.67
Weighted-Average Exercise Price, Options canceled	$11.89	$9.71	$8.53
Weighted-Average Exercise Price, Ending Balance	$12.99	$10.37	$7.65
Weighted-Average Exercise Price, Vested and expected to vest	$12.61
Weighted-Average Exercise Price, Exercisable	$9.89
Weighted-Average Remaining Contractual Term (In Years), Balance	7 years 7 months 6 days
Weighted-Average Remaining Contractual Term (In Years), Vested and expected to vest	7 years 5 months 27 days
Weighted-Average Remaining Contractual Term (In Years), Exercisable	6 years 8 months 5 days
Aggregate Intrinsic Value, Ending Balance	$29,817
Aggregate Intrinsic Value, Vested and expected to vest	28,783
Aggregate Intrinsic Value, Exercisable	$21,006

Stockholders_Equity_Summary_of

Stockholders' Equity - Summary of Additional Information Regarding Options Outstanding (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 29, 2015
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number Outstanding	8,307
Weighted-Average Remaining Contractual Life (In Years)	7 years 7 months 6 days
Weighted-Average Exercise Price per Share, Options Outstanding	$12.99
Number Exercisable	3,634
Weighted-Average Exercise Price per Share, Options Exercisable	$9.89
0.08 - 10.10 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Lower Limit	$0.08
Exercise Price Upper Limit	$10.10
Number Outstanding	2,068
Weighted-Average Remaining Contractual Life (In Years)	5 years 8 months 12 days
Weighted-Average Exercise Price per Share, Options Outstanding	$6.11
Number Exercisable	1,591
Weighted-Average Exercise Price per Share, Options Exercisable	$5.28
10.11 - 11.57 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Lower Limit	$10.11
Exercise Price Upper Limit	$11.57
Number Outstanding	1,887
Weighted-Average Remaining Contractual Life (In Years)	7 years 7 months 6 days
Weighted-Average Exercise Price per Share, Options Outstanding	$11.36
Number Exercisable	903
Weighted-Average Exercise Price per Share, Options Exercisable	$11.38
11.85 - 17.49 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Lower Limit	$11.85
Exercise Price Upper Limit	$17.49
Number Outstanding	2,077
Weighted-Average Remaining Contractual Life (In Years)	8 years 1 month 6 days
Weighted-Average Exercise Price per Share, Options Outstanding	$13.83
Number Exercisable	795
Weighted-Average Exercise Price per Share, Options Exercisable	$13.43
17.66 - 24.99 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Lower Limit	$17.66
Exercise Price Upper Limit	$24.99
Number Outstanding	2,275
Weighted-Average Remaining Contractual Life (In Years)	8 years 10 months 24 days
Weighted-Average Exercise Price per Share, Options Outstanding	$19.83
Number Exercisable	345
Weighted-Average Exercise Price per Share, Options Exercisable	$19.11

Stockholders_Equity_WeightedAv

Stockholders' Equity - Weighted-Average Assumptions in Determining Stock-Based Compensation Expense Options Granted (Detail) (Employee Stock Options [Member])	12 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Expected term (in years)		4 years 8 months 12 days	5 years 4 months 24 days
Volatility, Minimum	41.40%	40.10%	42.70%
Volatility, Maximum	45.90%	41.90%	48.50%
Risk-free interest rate, Minimum	1.40%	0.60%	0.60%
Risk-free interest rate, Maximum	1.60%	2.70%	1.30%
Dividend rate	0.00%	0.00%	0.00%
Minimum [Member]
Expected term (in years)	4 years 6 months
Maximum [Member]
Expected term (in years)	5 years

Stockholders_Equity_Restricted

Stockholders' Equity - Restricted Stock Unit and Restricted Stock Activity (Detail) (Restricted Stock Units and Restricted Stock [Member], USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 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	806	118
Shares, Granted	1,989	2,952	750
Shares, Released	-888	-251	-8
Shares, Forfeited	-396	-182	-54
Shares Unvested, Ending period	4,030	3,325	806
Weighted average grant date fair value per share, Unvested Beginning period	$16.63	$12.05	$12.47
Weighted average grant date fair value per share, Granted	$19.01	$17.28	$12.08
Weighted average grant date fair value per share, Released	$16.09	$11.84	$17.79
Weighted average grant date fair value per share, Forfeited	$18.39	$13.62	$12.48
Weighted average grant date fair value per share, Unvested Ending period	$17.75	$16.63	$12.05

Stockholders_Equity_Summary_of1

Stockholders' Equity - Summary of Total Stock-Based Compensation Costs (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	$30,504	$16,024	$8,519
Cost of Revenue [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	2,520	1,296	649
Research and Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	14,183	6,218	2,753
Selling, General and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	$13,801	$8,510	$5,117

Stockholders_Equity_Common_Sto

Stockholders' Equity - Common Stock Reserved for Future Issuance (Detail)	Mar. 29, 2015	Mar. 30, 2014
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future issuance	22,637	21,298
Warrants to purchase common stock	7,995	7,995
Total common stock reserved for future issuances	30,862	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	230	400
Employee Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future issuance	8,307	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	4,030	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	10,300	9,697

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended								12 Months Ended
Income Taxes - Additional Information (Detail) (USD $)	Mar. 29, 2015	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013	Apr. 01, 2012
Income Taxes Disclosure [Line Items]
Income tax provision (benefit)	($399,000)	($2,738,000)	$603,000	$279,000	($1,084,000)	($2,599,000)	$1,945,000	$1,808,000	($2,255,000)	$70,000	$5,301,000
Deferred tax assets	11,458,000				5,291,000				11,458,000	5,291,000
Deferred tax assets. Federal	10,600,000								10,600,000
Deferred tax assets, research and development	8,418,000				4,115,000				8,418,000	4,115,000
Other deferred tax assets, accrued expenses and stock based compensation	6,400,000								6,400,000
Deferred tax assets, Foreign	900,000								900,000
Provision made on the excess of the amount for financial reporting over the tax basis of investments in foreign subsidiaries	99,800,000				88,400,000				99,800,000	88,400,000
Increase in equity due to deferred tax assets realization									41,000	4,839,000	7,077,000
Valuation allowance increase									1,500,000	1,300,000
Unrecognized tax benefits	22,527,000				10,613,000				22,527,000	10,613,000	7,816,000	3,855,000
Unrecognized tax positions	20,400,000								20,400,000
Unrecognized tax benefits set up as valuation allowance	2,100,000								2,100,000
Accrued interest related to uncertain tax matters	400,000								400,000
California [Member]
Income Taxes Disclosure [Line Items]
Operating loss carryforward, expiry period									Between 2017 and 2022
Revenue [Member] \| Outside U.S. [Member] \| Customer Concentration Risk [Member]
Income Taxes Disclosure [Line Items]
Percentage of net revenue									90.00%	90.00%	90.00%
Minimum [Member] \| Revenue [Member] \| Customer Concentration Risk [Member]
Income Taxes Disclosure [Line Items]
Percentage of net revenue									10.00%
State and Local Jurisdiction [Member] \| California [Member]
Income Taxes Disclosure [Line Items]
Net operating loss carryforwards	17,600,000								17,600,000
Research tax credit carryforwards	8,300,000								8,300,000
Federal [Member]
Income Taxes Disclosure [Line Items]
Net operating loss carryforwards	18,000,000								18,000,000
Deferred tax assets net operating losses carryforward expiration period									20 years
Research tax credit carryforwards	7,700,000								7,700,000
Federal [Member] \| Minimum [Member]
Income Taxes Disclosure [Line Items]
Tax credit carryforward, expiry period									2032
Federal [Member] \| Maximum [Member]
Income Taxes Disclosure [Line Items]
Tax credit carryforward, expiry period									2035
Foreign Jurisdiction [Member]
Income Taxes Disclosure [Line Items]
Net operating loss carryforwards	$18,500,000								$18,500,000
Operating loss carryforward, expiry period									Indefinitely until they are utilized

Income_Taxes_Components_of_Inc

Income Taxes - Components of Income Before Taxes (Detail) (USD $)	3 Months Ended							12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Income Tax Disclosure [Abstract]
United States								($12,723)	($3,817)	$11,883
International								9,388	10,006	45,123
Income (loss) before income taxes	$7,483	($6,265)	($4,553)	($6,716)	($14,778)	$15,553	$12,130	($3,335)	$6,189	$57,006

Income_Taxes_Summary_of_Income

Income Taxes - Summary of Income Tax Expense (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2015	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Current
Federal									$468	$1,658	$5,553
State									1	1	6
International									3,843	179	142
Total current									4,312	1,838	5,701
Deferred
Federal									-5,715	-1,856	-375
State											-6
International									-852	88	-19
Total deferred									-6,567	-1,768	-400
Income tax provision	($399)	($2,738)	$603	$279	($1,084)	($2,599)	$1,945	$1,808	($2,255)	$70	$5,301

Income_Taxes_Schedule_of_Provi

Income Taxes - Schedule of Provision for Income Taxes Differs from Amount Computed by Applying Statutory Rates (Detail)	12 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Income Tax Disclosure [Abstract]
Income tax provision at the federal statutory rate	35.00%	35.00%	35.00%
Research and development credits	90.70%	-27.30%	-2.10%
Foreign tax rate differential	-27.30%	-22.00%	-25.80%
Non deductible stock compensation	-27.30%	19.50%	2.20%
Other	-3.50%	-4.10%
Effective tax rate	67.60%	1.10%	9.30%

Income_Taxes_Summary_of_Compon

Income Taxes - Summary of Components of Deferred Tax Asset (Detail) (USD $)	Mar. 29, 2015	Mar. 30, 2014
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Deferred tax assets:
Accrued expenses and reserves	$3,179	$1,769
Stock based compensation	4,081	2,167
Research and development credits	8,418	4,115
Net operating loss carryforwards	1,001	1,001
Gross Deferred tax assets	16,679	9,052
Valuation Allowance	-5,221	-3,761
Deferred tax assets, net of valuation allowance	11,458	5,291
Deferred tax liabilities:
Fixed Assets	-175	-44
Acquired Intangibles	-3,935
Total deferred tax liabilities	-4,110	-44
Deferred tax assets, net of valuation allowance and deferred tax liabilities	$7,348	$5,247

Income_Taxes_Reconciliation_of

Income Taxes - Reconciliation of Change in Unrecognized Tax Benefits (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Income Tax Disclosure [Abstract]
Beginning Balance	$10,613	$7,816	$3,855
Increases arising from acquisitions	7,605
Increases in unrecognized tax benefits	4,309	2,797	3,961
Ending Balance	$22,527	$10,613	$7,816

Acquisition_Additional_Informa

Acquisition - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended	8 Months Ended	0 Months Ended	3 Months Ended	5 Months Ended
Acquisition - Additional Information (Detail) (USD $)	Jul. 22, 2014	Mar. 29, 2015	Mar. 29, 2015	Aug. 29, 2014	Dec. 28, 2014	Mar. 30, 2014
Business Acquisition [Line Items]
Business acquisition, additional contingent cash payment		6,364,000	6,364,000
Significant Other Unobservable Inputs Level 3 [Member]
Business Acquisition [Line Items]
Purchase price assumed in long-term debt		2,600,000	2,600,000
Movea S.A [Member]
Business Acquisition [Line Items]
Business acquisition, effective date		22-Jul-14
Percentage of equity interest acquired		100.00%	100.00%
Cash consideration	60,900,000
Business acquisition, additional contingent cash payment	13,000,000
Business acquisition, contingent cash payment	8,400,000
Business acquisition, purchase price	69,300,000
Movea S.A [Member] \| Accrued Liabilities [Member]
Business Acquisition [Line Items]
Business acquisition, contingent cash payment	8,400,000
Movea S.A [Member] \| Research and Development [Member]
Business Acquisition [Line Items]
Difference between the contractual amount and the fair value of contingent consideration		5,000,000
Movea S.A [Member] \| Developed Technology [Member]
Business Acquisition [Line Items]
Estimated useful life		5 years
Fair value of intangible assets	7,200,000	7,200,000	7,200,000
Movea S.A [Member] \| Net Revenue [Member] \| Customer Concentration Risk [Member] \| Maximum [Member]
Business Acquisition [Line Items]
Percentage of net revenue			10.00%
Movea S.A [Member] \| Design win [Member]
Business Acquisition [Line Items]
Business acquisition, additional contingent cash payment	8,000,000
Movea S.A [Member] \| Product Development [Member]
Business Acquisition [Line Items]
Business acquisition, additional contingent cash payment	5,000,000	5,000,000	5,000,000
Trusted Positioning, Inc. [Member]
Business Acquisition [Line Items]
Business acquisition, effective date		29-Aug-14
Cash consideration				11,379,000
Business acquisition, contingent cash payment				7,634,000
Fair value of investments		300,000		1,215,000
Percentage of common stock acquired				4.57%
Purchase consideration remaining outstanding common stock				25,931,000
Number of common shares issued				236,000
Issuance of common stock				5,703,000
Equity interest percentage				100.00%
Non-cash gain on investment in acquiree				900,000
Trusted Positioning, Inc. [Member] \| Accrued Liabilities [Member]
Business Acquisition [Line Items]
Business acquisition, contingent cash payment				4,900,000
Trusted Positioning, Inc. [Member] \| Research and Development [Member]
Business Acquisition [Line Items]
Difference between the contractual amount and the fair value of contingent consideration		3,000,000
Trusted Positioning, Inc. [Member] \| Other long-term liabilities [Member]
Business Acquisition [Line Items]
Business acquisition, contingent cash payment				2,700,000
Trusted Positioning, Inc. [Member] \| Developed Technology [Member]
Business Acquisition [Line Items]
Estimated useful life		5 years
Fair value of intangible assets		8,600,000	8,600,000	8,600,000
Trusted Positioning, Inc. [Member] \| Design win [Member]
Business Acquisition [Line Items]
Business acquisition, additional contingent cash payment				5,000,000
Trusted Positioning, Inc. [Member] \| Development [Member]
Business Acquisition [Line Items]
Business acquisition, additional contingent cash payment		3,000,000	3,000,000	3,000,000
Trusted Positioning, Inc. [Member] \| Development of cloud [Member]
Business Acquisition [Line Items]
Business acquisition, additional contingent cash payment				2,000,000
Trusted Positioning, Inc. [Member] \| Deployment of cloud [Member]
Business Acquisition [Line Items]
Business acquisition, additional contingent cash payment				2,000,000
Analog Devices, Inc. [Member]
Business Acquisition [Line Items]
Contingent expense reimbursements		2,200,000
Fair value of intangible assets					37,400,000
Analog Devices, Inc. [Member] \| Forecast [Member]
Business Acquisition [Line Items]
Business acquisition, contingent cash payment					70,000,000
Business acquisition, purchase price					100,000,000
Contingent expense reimbursements		1,400,000			2,200,000
Business acquisition, fair value of contingent consideration					0
Analog Devices, Inc. [Member] \| Developed Technology [Member]
Business Acquisition [Line Items]
Estimated useful life		6 years
Fair value of intangible assets		28,520,000	28,520,000		$28,520,000
Analog Devices, Inc. [Member] \| Net Revenue [Member] \| Customer Concentration Risk [Member] \| Maximum [Member]
Business Acquisition [Line Items]
Percentage of net revenue		10.00%				10.00%

Acquisition_Summary_of_Purchas

Acquisition - Summary of Purchase Price of Assets Acquired and Liabilities Assumed (Detail) (USD $)	0 Months Ended	12 Months Ended	0 Months Ended
In Thousands, unless otherwise specified	Aug. 29, 2014	Mar. 29, 2015	Jul. 22, 2014	Mar. 30, 2014	Dec. 28, 2014
Preliminary allocation of purchase price:
Goodwill		$139,175		$50,952
Goodwill		139,175		50,952
Trusted Positioning, Inc. [Member]
Business Acquisition [Line Items]
Cash consideration	11,379
Issuance of common stock	5,703
Property and equipment, net	50
Contingent consideration	7,634
Fair value of previously held 4.57% equity interest	1,215	300
Purchase Consideration including equity interest previously held	25,931
Preliminary allocation of purchase price:
Current assets	392
Fixed assets	50
Other non-current assets	546
Goodwill	19,893
Current liabilities	-1,247
Long-term liabilities	-2,303
Total purchase price	25,931
Goodwill	19,893
Total purchase price	25,931
Trusted Positioning, Inc. [Member] \| Developed Technology [Member]
Preliminary allocation of purchase price:
Intangible assets	8,600	8,600
Intangible assets	8,600	8,600
Analog Devices, Inc. [Member]
Business Acquisition [Line Items]
Inventories					5,107
Property and equipment, net					4,339
Preliminary allocation of purchase price:
Fixed assets					4,339
Intangible assets					37,400
Goodwill					50,952
Total purchase price					97,808
Intangible assets					37,400
Goodwill					50,952
Total assets acquired					97,808
Total purchase price					97,808
Analog Devices, Inc. [Member] \| Developed Technology [Member]
Preliminary allocation of purchase price:
Intangible assets		28,520			28,520
Intangible assets		28,520			28,520
Analog Devices, Inc. [Member] \| In-Process Research And Development [Member]
Preliminary allocation of purchase price:
Intangible assets		7,330			7,330
Intangible assets		7,330			7,330
Analog Devices, Inc. [Member] \| Customer Relationships [Member]
Preliminary allocation of purchase price:
Intangible assets		1,560			1,560
Intangible assets		1,560			1,560
Movea S.A [Member]
Business Acquisition [Line Items]
Cash consideration			60,900
Property and equipment, net			209
Contingent consideration			8,400
Purchase consideration			69,300
Preliminary allocation of purchase price:
Current assets			3,082
Fixed assets			209
Other non-current assets			592
Goodwill			68,330
Current liabilities			-5,016
Long-term liabilities			-5,097
Total purchase price			69,300
Goodwill			68,330
Total purchase price			69,300
Movea S.A [Member] \| Developed Technology [Member]
Preliminary allocation of purchase price:
Intangible assets		7,200	7,200
Intangible assets		$7,200	$7,200

Acquisition_Summary_of_Estimat

Acquisition - Summary of Estimated Fair Value and Useful Lives of Intangible Assets (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2015	Jul. 22, 2014	Aug. 29, 2014	Dec. 28, 2014
Movea S.A [Member] \| Developed Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	$7,200	$7,200
Estimated useful life	5 years
Trusted Positioning, Inc. [Member] \| Developed Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	8,600		8,600
Estimated useful life	5 years
Analog Devices, Inc. [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value				37,400
Analog Devices, Inc. [Member] \| Developed Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	28,520			28,520
Estimated useful life	6 years
Analog Devices, Inc. [Member] \| Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	1,560			1,560
Estimated useful life	7 years
Analog Devices, Inc. [Member] \| In-Process Research And Development [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	$7,330			$7,330
Analog Devices, Inc. [Member] \| In-Process Research And Development [Member] \| Minimum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life	3 years
Analog Devices, Inc. [Member] \| In-Process Research And Development [Member] \| Maximum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life	5 years

Acquisition_Summary_of_Unaudit

Acquisition - Summary of Unaudited Proforma of Combined Financial Information (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Business Acquisition [Line Items]
Net revenue		$276,592
Net income (loss)		4,051
Movea S.A [Member]
Business Acquisition [Line Items]
Net revenue	372,693	255,709
Net income (loss)	($4,097)	($800)

Acquisition_Summary_of_Purchas1

Acquisition - Summary of Purchase Price of Assets Acquired and Liabilities Assumed (Parenthetical) (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Mar. 29, 2015	Aug. 29, 2014
Trusted Positioning, Inc. [Member]
Business Acquisition [Line Items]
Percentage of common stock acquired		4.57%
Analog Devices, Inc. [Member]
Business Acquisition [Line Items]
Contingent expense reimbursements	$2.20

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets - Summary of Activity Related to Carrying Value of Goodwill (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014	Jul. 22, 2014	Aug. 29, 2014
Goodwill [Line Items]
Beginning balance		$50,952
Ending balance	139,175	50,952
Movea S.A [Member]
Goodwill [Line Items]
Beginning balance			68,330
Goodwill recorded in connection with the acquisition	68,330
Ending balance			68,330
Trusted Positioning, Inc. [Member]
Goodwill [Line Items]
Beginning balance				19,893
Goodwill recorded in connection with the acquisition	19,893
Ending balance				$19,893

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets - Additional Information (Detail) (USD $)	12 Months Ended
	Mar. 29, 2015	Mar. 30, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization for acquired intangible assets	$7,003,000	$2,073,000
In-Process Research And Development [Member]
Finite-Lived Intangible Assets [Line Items]
Write-off of in-process research and development	$800,000

Goodwill_and_Intangible_Assets4

Goodwill and Intangible Assets - Summary of Intangible Assets and Accumulated Amortization (Detail) (USD $)	Mar. 29, 2015	Mar. 30, 2014
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	$48,000	$30,080
Intangible assets, Accumulated Amortization	9,052	2,073
Intangible assets, Net	38,948	28,007
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	44,320	28,520
Intangible assets, Accumulated Amortization	8,697	1,980
Intangible assets, Net	35,623	26,540
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	1,560	1,560
Intangible assets, Accumulated Amortization	316	93
Intangible assets, Net	1,244	1,467
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	2,120
Intangible assets, Accumulated Amortization	39
Intangible assets, Net	$2,081

Goodwill_and_Intangible_Assets5

Goodwill and Intangible Assets - Estimated Future Amortization Expense Related to Intangible Assets (Detail) (USD $)	Mar. 29, 2015	Mar. 30, 2014
In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
2016	$8,607
2017	8,607
2018	8,607
2019	8,607
2020	4,390
Thereafter	130
Intangible assets, Net	$38,948	$28,007

Quarterly_Financial_Data_Unaud2

Quarterly Financial Data (Unaudited) - Summary of Quarterly Financial Data (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 29, 2015	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Net revenue	$99,279	$115,864	$90,195	$66,681	$58,998	$66,684	$70,941	$55,910	$372,019	$252,533	$208,634
Costs of revenue	56,333	65,468	58,854	35,505	31,675	35,094	34,364	26,591	216,160	127,724	97,937
Gross profit	42,946	50,396	31,341	31,176	27,323	31,590	36,577	29,319	155,859	124,809	110,697
Operating expenses:
Research and development	25,231	24,391	21,593	19,408	15,985	14,522	9,810	8,114	90,623	48,431	24,648
Selling, general and administrative	15,325	15,551	14,592	13,918	15,102	15,663	11,424	9,155	59,386	51,344	29,391
Litigation settlement					500	14,500				15,000
Total operating expenses	40,556	39,942	36,185	33,326	31,587	44,685	21,234	17,269	150,009	114,775	54,039
Income (loss) from operations	2,390	10,454	-4,844	-2,150	-4,264	-13,095	15,343	12,050	5,850	10,034	56,658
Interest (expense)	-2,659	-2,690	-2,620	-2,584	-2,548	-1,464			-10,553	-4,012	-2
Other income (expense), net	269	-281	1,199	181	96	-219	210	80	1,368	167	350
Income (loss) before income taxes		7,483	-6,265	-4,553	-6,716	-14,778	15,553	12,130	-3,335	6,189	57,006
Income tax provision (benefit)	-399	-2,738	603	279	-1,084	-2,599	1,945	1,808	-2,255	70	5,301
Net income (loss)	$399	$10,221	($6,868)	($4,832)	($5,632)	($12,179)	$13,608	$10,322	($1,080)	$6,119	$51,705
Net income (loss) per share of common stock:
Basic	$0	$0.11	($0.08)	($0.05)	($0.06)	($0.14)	$0.16	$0.12	($0.01)	$0.07	$0.62
Diluted	$0	$0.11	($0.08)	($0.05)	($0.06)	($0.14)	$0.15	$0.12	($0.01)	$0.07	$0.59
Weighted average shares outstanding used in computing net income (loss) per share:
Basic	90,359	89,779	88,997	88,302	87,691	87,047	86,289	85,038	89,359	86,520	82,738
Diluted	92,619	92,336	89,928	88,302	87,691	87,047	89,778	87,914	89,359	89,928	87,359