InvenSense 10-Q 4 Nov 16 2017 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Oct. 02, 2016	Oct. 21, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Oct. 2, 2016
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q2
Trading Symbol	INVN
Entity Registrant Name	InvenSense Inc
Entity Central Index Key	1,294,924
Current Fiscal Year End Date	--04-03
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		93,973,000

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Oct. 02, 2016	Apr. 03, 2016
Current assets:
Cash and cash equivalents	$ 37,047	$ 41,105
Short-term investments	239,121	243,755
Accounts receivable	36,599	41,447
Inventories	46,101	62,297
Prepaid expenses and other current assets	9,187	9,250
Total current assets	368,055	397,854
Property and equipment, net	33,140	36,271
Intangible assets, net	43,988	43,169
Goodwill	143,320	139,175
Other assets	5,778	5,992
Total assets	594,281	622,461
Current liabilities:
Accounts payable	16,507	35,200
Accrued liabilities	31,123	30,248
Total current liabilities	47,630	65,448
Long-term debt	155,310	151,038
Other long-term liabilities	26,703	27,230
Total liabilities	229,643	243,716
Commitments and contingencies (Note 4)
Preferred stock:
Preferred stock, $0.001 par value - 20,000 shares authorized, no shares issued and outstanding at October 2, 2016 and April 3, 2016
Common stock:
Common stock, $0.001 par value - 750,000 shares authorized, 93,855 shares issued and outstanding at October 2, 2016; 93,010 shares issued and outstanding at April 3, 2016;	321,956	303,153
Accumulated other comprehensive (loss)	(241)	(26)
Retained earnings	42,923	75,618
Total stockholders' equity	364,638	378,745
Total liabilities and stockholders' equity	$ 594,281	$ 622,461

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Oct. 02, 2016	Apr. 03, 2016
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 0.001	$ 0.001
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	$ 0.001	$ 0.001
Common stock, shares authorized	750,000,000	750,000,000
Common stock, shares issued	93,855,000	93,010,000
Common stock, shares outstanding	93,855,000	93,010,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Income Statement [Abstract]
Net revenue	$ 79,831	$ 112,545	$ 140,467	$ 218,841
Costs of revenue	46,299	65,974	82,190	127,439
Gross profit	33,532	46,571	58,277	91,402
Operating expenses:
Research and development	28,144	24,991	54,685	45,246
Selling, general and administrative	14,869	15,186	28,731	31,010
Legal settlement				11,708
Total operating expenses	43,013	40,177	83,416	87,964
Income (loss) from operations	(9,481)	6,394	(25,139)	3,438
Interest expense	(2,925)	(2,765)	(5,806)	(5,489)
Other income (expense), net	138	104	364	165
Income (loss) before income taxes	(12,268)	3,733	(30,581)	(1,886)
Income tax provision (benefit)	242	(1,960)	2,114	(1,732)
Net income (loss)	$ (12,510)	$ 5,693	$ (32,695)	$ (154)
Net income (loss) per share of common stock:
Basic	$ (0.13)	$ 0.06	$ (0.35)	$ 0
Diluted	$ (0.13)	$ 0.06	$ (0.35)	$ 0
Weighted average shares outstanding used in computing net income (loss) per share:
Basic	93,657	91,574	93,447	91,325
Diluted	93,657	92,569	93,447	91,325

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (12,510)	$ 5,693	$ (32,695)	$ (154)
Other comprehensive loss:
Unrealized loss on available-for-sale securities, net of tax	(212)	(59)	(215)	(98)
Comprehensive income (loss)	$ (12,722)	$ 5,634	$ (32,910)	$ (252)

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Oct. 02, 2016	Sep. 27, 2015
Cash flows from operating activities:
Net loss	$ (32,695)	$ (154)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation	6,781	6,245
Amortization of intangible assets	4,882	4,503
Non cash interest expense	4,271	3,958
Loss on other investments	325
Stock-based compensation expense	17,221	17,683
Contingent consideration adjustment		(5,307)
Deferred income tax assets	75	(3,498)
Tax effect of employee benefit plan		(758)
Changes in operating assets and liabilities:
Accounts receivable	4,847	(5,912)
Inventories	16,196	13,421
Prepaid expenses and other assets	6	2,113
Other assets	398	(1,833)
Accounts payable	(18,623)	12,444
Accrued liabilities	506	15,872
Net cash provided by operating activities	4,190	58,777
Cash flows from investing activities:
Acquisitions, net of cash acquired	(9,845)
Purchase of property and equipment	(3,784)	(3,953)
Sales and maturities of available-for-sale investments	143,011	71,843
Purchase of available-for-sale investments	(138,731)	(145,732)
Operating lease deposit	(207)
Other non-marketable investments	(300)
Net cash used in investing activities	(9,856)	(77,842)
Cash flows from financing activities:
Proceeds from the issuance of common stock	1,702	3,590
Repayment of loan	(94)
Net cash provided by financing activities	1,608	3,590
Net decrease in cash and cash equivalents	(4,058)	(15,475)
Cash and cash equivalents:
Beginning of period	41,105	85,637
End of period	37,047	70,162
Supplemental disclosures of cash flow information:
Cash paid for interest	1,531	1,531
Cash paid for income taxes	455	294
Noncash investing and financing activities:
Unpaid purchases of property and equipment	356	604
Unrealized loss from available-for-sale investments	$ (241)	$ (157)

Organization and summary of sig

Organization and summary of significant accounting policies	6 Months Ended
	Oct. 02, 2016
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. The Company targets 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. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes thereto for the fiscal year ended April 3, 2016 included in the Company’s Annual Report on Form 10-K filed on May 25, 2016 with the Securities and Exchange Commission (“SEC”). No material changes have been made to the Company’s significant accounting policies since the Company’s Annual Report on Form 10-K for the fiscal year ended April 3, 2016. Certain significant business risks and uncertainties The Company participates in the high-technology industry and believes that a number of factors including, but not limited to the following could have a material effect on the Company’s future financial position, results of operations, or cash flows: reliance on a limited number of primary customers to support the Company’s revenue generating activities; changes in end-user demand for the products manufactured and sold by the Company and its customers; the receipt, reduction, cancellation or delay of significant orders by customers; advances and trends in new technologies and industry standards; new product announcements and introductions by the Company’s competitors; the general cyclicality and seasonality of the semiconductor and consumer electronics industries and the resulting effect on the Company’s business; market acceptance of the Company’s and its customers’ products; the Company’s development and introduction of new products on a timely basis; developing new sales channels and attracting new customers; significant warranty claims, including those not covered by the Company’s suppliers; delays in the Company’s customers’ ability to manufacture and ship products that incorporate the Company’s products caused by internal and external factors unrelated to the Company’s business and that are out of its control; shortages of key third party components; the effects of competitive pricing pressures, including decreases in average selling prices of the Company’s products; write-downs of inventory for excess quantity, changes in business priorities, technological obsolescence and erosion in net realizable value; strategic relationships, including key component suppliers; litigation or claims against the Company based on intellectual property, patent, product, regulatory, or other factors; and the Company’s ability to attract and retain employees necessary to support its growth. Further information on potential risks that could affect the Company’s business and financial results is included in the Company’s Annual Report on Form 10-K for the year ended April 3, 2016 filed with SEC on May 25, 2016. Basis of consolidation The consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles, or GAAP, and include the Company’s accounts and the accounts of its 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 condensed consolidated statements of operations. Fiscal year The Company’s fiscal year is a 52 or 53 week period ending on the Sunday closest to March 31. Fiscal year 2016 was a 53-week fiscal year ended April 3, 2016 (“Fiscal year 2016”). The extra week was included in the Company’s fourth fiscal quarter ended April 3, 2016. The Company’s fiscal year ended March 29, 2015 (“fiscal year 2015”) was comprised of 52 weeks. The first and second fiscal quarters in each of the two most recent fiscal years included 13 weeks. Basis of presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with GAAP and applicable rules and regulations of the SEC regarding interim financial reporting. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. The condensed consolidated balance sheet as of April 3, 2016, included herein was derived from the audited financial statements as of that date, but does not include all disclosures required by GAAP. The unaudited interim condensed consolidated financial statements, in the opinion of management, reflect adjustments, consisting of all normal recurring adjustments, necessary to present fairly the Company’s financial position, results of operations, comprehensive loss and cash flows for the interim periods. The results of operations for the period ended October 2, 2016 is not necessarily indicative of the results to be expected for the fiscal year ending April 2, 2017 or for any future year or interim period. Use of estimates The preparation of the Company’s condensed consolidated financial statements and related notes in conformity with 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 condensed consolidated financial statements and related notes and the reported amounts of income and expenses during the reporting period. Significant estimates included in the condensed consolidated financial statements and related notes include income taxes, inventory valuation, stock-based compensation, loss contingencies, warranty reserves, goodwill, valuation of acquired assets, and valuation of convertible senior note, including the related convertible notes hedges and warrants. These estimates are based upon information available as of the date of the condensed consolidated financial statements, and actual results could differ from those estimates. 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 Standard 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. 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 has determined that it has a single reporting unit for purposes of performing its goodwill impairment test. 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 performs the annual goodwill impairment analysis in the third quarter of each fiscal year. As of October 2, 2016, no events or changes in circumstances indicate the carrying value may not be recoverable. Concentration of credit risk The majority of the Company’s products are shipped to distributors, original design manufacturers and contract manufacturers (collectively referred to as “intermediaries”), who are the legal counter-parties to the Company’s sales. When the Company references customers, sales and revenue in this report, the Company is referring to the manufacturers of consumer electronics devices who are the end customers for our products. However, any disclosure about the composition of the Company’s accounts receivable refers to the intermediaries. Some of the Company’s intermediaries may serve more than one of the Company’s customers. As a result, attempting to compare or correlate disclosures about the Company’s accounts receivable composition as of a particular date with the disclosures regarding revenues generated by the Company’s customers for the period ending on the same date can be difficult or misleading. One distributor accounted for 66% of accounts receivable and one customer accounted for 14% of accounts receivable at October 2, 2016. One distributor accounted for 49% of accounts receivable and one customer accounted for 20% of accounts receivable at September 27, 2015. For the three months ended October 2, 2016, Apple Inc. (“Apple”) and GH Development Holdings Limited (“GHIC”) accounted for 58% and 11% of total net revenue, respectively. For the three months ended September 27, 2015, Apple and Samsung Electronics Co., Ltd. (“Samsung”) accounted for 34% and 19% of total net revenue, respectively. For the six months ended October 2, 2016, Apple accounted for 53% of net revenue. For the six months ended September 27, 2015, Apple and Samsung accounted for 36% and 21% of total net revenue, respectively. Warranty The Company offers one year standard warranty on its products. In selective cases, the warranty period can be extended to multiple years. The Company’s accrual for anticipated warranty costs includes management’s judgment regarding anticipated rates of warranty claims and associated repair costs. The following table summarizes the activity related to product warranty liability during the six months ended October 2, 2016 and September 27, 2015: Six Months Ended October 2, September 27, (in thousands) Beginning balance $ 625 $ 341 Provision for warranty 682 421 Adjustments related to changes in estimate (519 ) (204 ) Less: actual warranty costs (18 ) (82 ) Ending balance $ 770 $ 476 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. In periods in which the Company has reported a net loss, the common stock equivalents are excluded from the calculation of diluted net loss per share of common stock as their effect is antidilutive under the treasury stock method. The following table presents the calculation of basic and diluted net income (loss) per share: Three Months Ended Six Months Ended October 2, September 27, October 2, September 27, (in thousands, except per share data) Numerator: Basic and diluted Net income (loss) $ (12,510 ) $ 5,693 $ (32,695 ) $ (154 ) Denominator: Basic shares: Weighted-average shares used in computing basic net income (loss) per share 93,657 91,574 93,447 91,325 Diluted shares: Weighted-average shares used in computing basic net income (loss) per share 93,657 91,574 93,447 91,325 Effect of potentially dilutive securities: Stock options and unvested restricted stock — 995 — — Weighted-average shares used in computing diluted net income (loss) per share 93,657 92,569 93,447 91,325 Net income (loss) per share Basic $ (0.13 ) $ 0.06 $ (0.35 ) $ (0.00 ) Diluted $ (0.13 ) $ 0.06 $ (0.35 ) $ (0.00 ) The following summarizes the potentially dilutive securities outstanding at the end of each period that were excluded from the computation of diluted net income (loss) per share for the periods presented as their effect would have been antidilutive: Three Months Ended Six Months Ended October 2, September 27, October 2, September 27, 2016 2015 2016 2015 (in thousands) Employee stock options 12,033 7,382 11,609 9,059 Unvested restricted stock units 5,212 2,989 5,112 4,204 Total antidilutive securities 17,245 10,371 16,721 13,263 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). Segment information The Company operates in one operating segment, the design, development, manufacture and marketing of 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 (“FASB”) ASC 280 “Segment Reporting”. Enterprise-wide information is provided in accordance with ASC 280. Geographical revenue information is based on the location of the head offices of the Company’s customers. Property and equipment information is based on the physical location of the assets at the end of each fiscal period. Property and equipment, net by country was as follows: October 2, April 3, Country 2016 2016 (in thousands) Taiwan $ 22,325 $ 25,183 United States 8,861 9,207 Other 1,954 1,881 $ 33,140 $ 36,271 Net revenue from unaffiliated customers by location of the Company’s customers’ headquarters offices was as follows: Three Months Ended Six Months Ended October 2, September 27, October 2, September 27, Region 2016 2015 2016 2015 (in thousands) United States $ 50,193 $ 42,913 $ 80,298 $ 86,716 China 14,844 26,010 27,290 50,616 Korea 5,074 24,469 10,868 53,192 Japan 4,873 8,028 10,153 12,164 Taiwan 3,583 7,576 9,008 10,762 Rest of world 1,264 3,549 2,850 5,391 $ 79,831 $ 112,545 $ 140,467 $ 218,841 A majority of sales to U.S. headquartered companies are sold to their distributors or contract manufacturers located overseas. Recent accounting pronouncements In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses. Under the new guidance, credit losses for certain types of financial instruments will be estimated based on expected losses. The new guidance also modifies the impairment models for available-for-sale debt securities and for purchased financial assets with credit deterioration since their origination. The new guidance will be effective for the Company starting in the first quarter of fiscal 2021. Early adoption is permitted starting in the first quarter of fiscal 2020. The Company is in the process of determining the effects the adoption will have on its consolidated financial statements as well as whether to adopt the new guidance early. In March, 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting, which amends ASC Topic 718, Compensation—Stock Compensation. The new guidance simplifies several aspects of the accounting for employee share-based payment transactions for both public and nonpublic entities, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements, as well as classification in the statement of cash flows. The new guidance will be effective for the Company starting in the first quarter of fiscal 2018. Early adoption is permitted in any annual or interim period. The Company is in the process of determining the effects the adoption will have on its consolidated financial statements as well as whether to adopt the new guidance early. In February 2016, the FASB issued new guidance related to leases that outlines a comprehensive lease accounting model and supersedes the current lease guidance. The new guidance requires lessees to recognize lease liabilities and corresponding right-of-use assets for all leases with lease terms of greater than 12 months. It also changes the definition of a lease and expands the disclosure requirements of lease arrangements. The new guidance must be adopted using the modified retrospective approach and will be effective for the Company starting in the first quarter of fiscal 2020. Early adoption is permitted. The Company is in the process of determining the effects the adoption will have on its consolidated financial statements as well as whether to adopt the new guidance early. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606). ASU No. 2014-09 provides guidance that companies will recognize revenue to depict the transfer of goods or services to customers in amounts that reflect the payment to which a company expects to be entitled in exchange for those goods or services. The 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 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.

Cash equivalents and available-

Cash equivalents and available-for-sale investments	6 Months Ended
	Oct. 02, 2016
Cash and Cash Equivalents [Abstract]
Cash equivalents and available-for-sale investments	2. Cash equivalents and available-for-sale investments At October 2, 2016, cash and cash equivalents totaled $37.0 million, of which $7.1 million was cash and $29.9 million was cash equivalents invested in money market funds. At October 2, 2016, $23.9 million of the cash and cash equivalents were held by the Company’s foreign subsidiaries. Additionally, as of October 2, 2016, the Company had short-term available-for-sale investments of $239.1 million. At April 3, 2016, cash and cash equivalents totaled $41.1 million, of which $25.4 million was cash and $15.7 million was cash equivalents invested in money market funds. At April 3, 2016, $21.0 million of the cash and cash equivalents were held by the Company’s foreign subsidiaries. Additionally, as of April 3, 2016, the Company had short-term available-for-sale investments of $243.8 million. The Company applies the provisions of ASC 820-10, “ Fair Value Measurements 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 the Company’s 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 reported at their carrying values. Fair value measurements at each reporting date were as follows: October 2, 2016: Assets and liabilities measured at fair value on a recurring basis were presented in the Company’s condensed consolidated balance sheet as of October 2, 2016. October 2, Quoted prices in active markets Significant Significant balance Level 1 Level 2 Level 3 (in thousands) Assets Money market funds $ 29,891 $ 29,891 $ — $ — Corporate notes and bonds 91,672 — 91,672 — Commercial paper 116,604 — 116,604 — U.S. agency securities 30,845 — 30,845 — Total investments $ 269,012 $ 29,891 $ 239,121 $ — Liabilities Contingent consideration $ 1,909 $ — $ — $ 1,909 Assets Cash equivalents $ 29,891 $ 29,891 $ — $ — Short-term investments 239,121 — 239,121 — Total investments $ 269,012 $ 29,891 $ 239,121 $ — Liabilities Accrued liabilities $ 1,909 $ — $ — $ 1,909 Total contingent consideration $ 1,909 $ — $ — $ 1,909 October 2, Gross Gross October 2, 2016 unrealized unrealized 2016 amortized cost gain loss estimated FMV (in thousands) Corporate notes and bonds $ 91,763 $ 1 $ (92 ) $ 91,672 Commercial paper 116,770 1 (167 ) 116,604 U.S. agency securities 30,829 16 — 30,845 Total available-for-sale investments $ 239,362 $ 18 $ (259 ) 239,121 Money market funds 29,891 Total aggregate fair value $ 269,012 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. None of the gross unrealized losses as of October 2, 2016 were considered to be other-than-temporary impairments. There were no transfers of assets measured at fair value between Level 1 and Level 2 during the six months ended October 2, 2016. April 3, 2016: Assets and liabilities measured at fair value on a recurring basis were presented in the Company’s condensed consolidated balance sheet as of April 3, 2016. April 3, balance Quoted prices in active markets for identical Level 1 Significant other observable inputs Level 2 Significant other unobservable inputs Level 3 (in thousands) Assets Money market funds $ 15,697 $ 15,697 $ — $ — Corporate notes and bonds 163,675 — 163,675 — Commercial paper 45,473 — 45,473 — U.S. agency securities 34,607 — 34,607 — Total investments $ 259,452 $ 15,697 $ 243,755 $ — Liabilities Contingent consideration $ 1,909 $ — $ — $ 1,909 Assets Cash equivalents $ 15,697 $ 15,697 $ — $ — Short-term investments 243,755 — 243,755 — Total investments $ 259,452 $ 15,697 $ 243,755 $ — Liabilities Accrued liabilities $ 1,909 $ — $ — $ 1,909 Total contingent consideration $ 1,909 $ — $ — $ 1,909 April 3, 2016 Gross Gross April 3, 2016 (in thousands) Corporate notes and bonds $ 163,712 $ 19 $ (56 ) $ 163,675 Commercial paper 45,480 3 (10 ) 45,473 U.S. agency securities 34,589 25 (7 ) 34,607 Total available-for-sale investments $ 243,781 $ 47 $ (73 ) 243,755 Money market funds 15,697 Total aggregate fair value $ 259,452 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 year 2016. 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 three and six months ended October 2, 2016 and September 27, 2015: Three Months Ended Six Months Ended October 2, September 27, October 2, September 27, 2016 2015 2016 2015 (in thousands) Beginning balance $ 1,909 $ 3,817 $ 1,909 $ 9,124 Change in fair value and other — — — (5,307 ) Ending balance $ 1,909 $ 3,817 $ 1,909 $ 3,817 Contingent consideration on acquired businesses 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. 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. The initial 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 is 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. In fiscal year 2016, the fair value of contingent consideration, net declined by $5.3 million. The decline in fair value was the result of a reduction in the probability of a design win milestone associated with the Movea, S.A. (“Movea”) acquisition from 50% to 0% and a reduction in the probability of a design win associated with the Trusted Positioning, Inc. (“TPI”) acquisition from 50% to 0%. The gross declines in fair value of the design win milestones for Movea and TPI were $4.0 million and $2.4 million, respectively, were recorded as a credit to research and development expense. The earn-out payments for the Movea and TPI design win milestones were not made as these milestones were not met and expired during fiscal year 2016. Offsetting the gross declines was an increase in the fair value of two TPI cloud application milestones as a result of an increase in the estimated probability of achievement of those milestones. The increase in the fair value of the cloud application milestones was $1.1 million, which was recorded as a debit to research and development expense in fiscal year 2016. A design milestone for TPI was achieved and the payment of $1.9 million was made in fiscal year 2016. The last milestone of $1.9 million for TPI is expected to be paid in fiscal year 2017.

Balance sheet details

Balance sheet details	6 Months Ended
	Oct. 02, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Balance sheet details	3. Balance sheet details Inventories Inventories at October 2, 2016 and April 3, 2016 consist of the following: October 2, 2016 April 3, 2016 (in thousands) Work in process $ 30,381 $ 40,329 Finished goods 15,720 21,968 Total inventories $ 46,101 $ 62,297 Prepaid expenses and other current assets Prepaid expenses and other current assets at October 2, 2016 and April 3, 2016 consist of the following: October 2, 2016 April 3, 2016 (in thousands) Prepaid expenses $ 5,647 $ 5,256 Income tax receivable 42 156 Other receivables 1,031 1,676 Other current assets 2,467 2,162 Total prepaid expenses and other current assets $ 9,187 $ 9,250 Property and equipment Property and equipment at October 2, 2016 and April 3, 2016 consists of the following: October 2, 2016 April 3, 2016 (in thousands) Production and lab equipment $ 55,083 $ 52,821 Computer equipment and software 10,410 9,074 Equipment under construction 678 607 Leasehold improvements and furniture and fixtures 8,400 8,396 Subtotal 74,571 70,898 Accumulated depreciation and amortization (41,431 ) (34,627 ) Property and equipment—net $ 33,140 $ 36,271 Depreciation expense for the three and six months ended October 2, 2016 was $3.5 million and $6.8 million, respectively. Depreciation expense for the three and six months ended September 27, 2015 was $3.2 million and $6.2 million, respectively. Equipment under construction consists primarily of production and lab equipment. Equipment under construction is not subject to depreciation until it is available for its intended use. All of the equipment under construction is expected to be completed and placed in service by the end of fiscal 2017. Accrued liabilities Accrued liabilities at October 2, 2016 and April 3, 2016 consist of the following: October 2, 2016 April 3, 2016 (in thousands) Payroll-related expenses $ 8,569 $ 8,030 Bonuses 3,686 5,040 Contingent consideration, current portion 1,909 1,909 Deferred revenue 1,618 1,949 Legal fees 694 197 Accrued contractual coupon interest payable on convertible senior notes 1,316 1,313 Income tax payable 1,150 553 Other tax payable 768 768 Customer deposits 2,582 4,008 Other accrued liabilities 8,831 6,481 Total accrued liabilities $ 31,123 $ 30,248 Other long-term liabilities Other long-term liabilities at October 2, 2016 and April 3, 2016 consists of the following: October 2, 2016 April 3, 2016 (in thousands) Long-term tax payable $ 14,943 $ 13,928 Deferred rent 3,001 3,436 Deferred tax liabilities 2,554 3,026 Deferred revenue 3,700 4,100 Long-term debt 2,412 2,465 Other long-term liabilities 93 275 Total other long-term liabilities $ 26,703 $ 27,230

Commitments and contingencies

Commitments and contingencies	6 Months Ended
	Oct. 02, 2016
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 October 2, 2016 are as follows: Amount Fiscal Years Ending: (in thousands) 2017 (remainder) $ 2,949 2018 6,524 2019 6,691 2020 5,339 2021 1,406 Beyond 514 Total $ 23,423 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, net of the rent income from subleases of $0.4 million and $0.8 million, was approximately $1.2 million and $2.3 million for the three and six months ended October 2, 2016, respectively. The Company’s rental expense under operating leases, net of the rent income from subleases of $0.4 million and $0.7 million, was approximately $1.2 million and $2.6 million for the three and six months ended September 27, 2015, respectively. Purchase Commitments The Company has non-cancelable purchase commitments with its foundry vendors. Future minimum payments of $21.8 million under the purchase commitments as of October 2, 2016 are due in less than twelve months. Legal proceedings and contingencies From time to time the Company is involved in various disputes and litigation matters that arise in the ordinary course of our business, including disputes and lawsuits related to intellectual property and employment issues. In addition, the Company is a party to class action lawsuits. In January and March 2015, purported shareholders filed five substantially similar class action complaints in the U.S. District Court, Northern District of California against the Company and two of the Company’s current and former executives (“Class Action Defendants”) (Jim McMillan v. InvenSense, Inc., et al. Case No. 3:15-cv-00084-JD, filed January 7, 2015; William Lendales v. InvenSense, Inc. et al., Case No. 3:15-cv-00142-VC, filed on January 12, 2015; Plumber & Steamfitters Local 21 Pension Fund v. InvenSense, Inc., et al., Case No. 5:15-cv-00249-BLF, filed on January 16, 2015; William B. Davis vs. InvenSense, Inc., et al., Case No. 5:15-cv-00425-RMW, filed on January 29, 2015; and Saratoga Advantage Trust Technology & Communications Portfolio v. InvenSense et al., Case No. 3:15-cv-01134, filed on March 11, 2015). On April 23, 2015, three of those cases were consolidated into a single proceeding which is currently pending in the U.S. District Court, Northern District of California and captioned In re InvenSense, Inc. Securities Litigation, Case No. 3:15-cv-00084-JD (the “Securities Case”), and the Vossen Group was designated as lead plaintiff; the other two cases (Lendales and Saratoga Advantage Trust) were voluntarily dismissed in March and June 2015, respectively. On May 26, 2015, the lead plaintiffs filed a consolidated amended class action complaint, which 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. On June 25, 2015, the Class Action Defendants filed a motion seeking dismissal of the case. A ruling granting the motion in part and denying it in part, and giving the lead plaintiffs leave to file an amended complaint, issued on March 28, 2016. The lead plaintiffs filed an amended complaint on April 18, 2016. On May 5, 2016, the Class Action Defendants filed a motion seeking dismissal of the amended complaint. The motion was argued and submitted on June 29, 2016; the court has not yet filed an order ruling on the motion. In light of the unresolved legal issues, 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. In addition, in January and March 2015, other purported shareholders filed three substantially similar shareholder derivative complaints against two of our current and former officers and several of our current and former directors, two in the U.S. District Court, Northern District of California and a third in Santa Clara Superior Court (George E Rollins v. Behrooz Abdi et al., Case No. 5:15-cv-00184-PSG, filed on January 13, 2015; Linda Karr v. Behrooz Abdi et al., Case No. 5:15-cv-00200-NC, filed on January 14, 2015; and Robert Bilbrey v. Behrooz Abdi et al., Case No. 1-15-CV-278742 was filed on March 20, 2015). The two federal court derivative actions have been consolidated into In re InvenSense, Inc. Derivative Litigation, Case No. 5:15-cv-00184-PSG. In June 2016, other purported shareholders filed a substantially similar shareholder derivative complaint against three of our current and former officers and several of our current and former directors in the Superior Court of the Commonwealth of Massachusetts, Suffolk County (Valerie Caveglia v. Jon Olson, et al., Civil Action No. 16-1971-BLS-1) (collectively, the “Derivative Cases”). In the Derivative Cases complaints, the plaintiffs make 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. The Company has undertaken an evaluation of these complaints. Plaintiffs in all four of the Derivative Cases have agreed to, and the courts have entered, indefinite stays pending developments in the Securities Case. 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. Robert Bosch GmbH (“Bosch”), one of the Company’s competitors, and the Company have each previously made generalized assertions of potential patent infringement by the other. On October 28, 2015, the Company and Bosch resolved all assertions of potential infringement between them and entered into a multi-year, worldwide patent cross license agreement for MEMS and sensor technologies, excluding patents covering InvenSense’s CMOS-MEMS eutectic bonding production process and Bosch’s two-layer porous silicon production process, and an upfront payment of $11.5 million to Bosch. The other terms of the settlement and the patent cross license agreement remain confidential and are not expected to have a material impact on the Company’s future results. Based on the status of the negotiations, the Company recognized a pre-tax charge of $11.7 million during the quarter ended June 28, 2015. On October 28, 2015, Bosch and the Company resolved all assertions of potential infringement made by the other. There were no significant changes to the final terms which required any additional charge in the fiscal year 2016. 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 the Company’s business. The Company is not aware of any other pending legal matters or claims, individually or in the aggregate, that are expected to have a material adverse impact on its condensed 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 the Company’s business. An adverse outcome in any of these actions, including a judgment or settlement, may have a material adverse effect on the Company’s 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. 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 directors, 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	6 Months Ended
	Oct. 02, 2016
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 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 obligations 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. 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 an 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 were allocated to the equity component of the Notes, $3.0 million of issuance costs paid to the initial purchaser were accounted for as a debt discount and $0.25 million of the issuance costs were classified as other non-current assets. Debt issuance costs were reclassified and presented in the balance sheet as a direct deduction from the carrying value of the debt liability, consistent with the presentation of a debt discount in the first quarter of the Company’s fiscal year 2016 pertaining to the requirement of ASU 2015-03, Simplifying the Presentation of Debt Issuance Costs. 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 Notes 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 the 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 Notes. 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 the 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 are classified in stockholders’ equity in the Company’s condensed consolidated balance sheets. The following table summarizes the principal amounts and related unamortized discount on the Notes: October 2, 2016 April 3, 2016 (in thousands) Principal amount of the Notes $ 175,000 $ 175,000 Unamortized discount on the Notes 19,565 23,809 Unamortized debt issuance costs 125 153 Net carrying value $ 155,310 $ 151,038 The following table presents the amount of interest expense recognized related to the Notes: Three Months Ended Six Months Ended October 2, September 27, October 2, September 27, 2016 2015 2016 2015 (in thousands) Contractual coupon interest expense $ 764 $ 764 $ 1,528 $ 1,528 Accretion of debt discount 2,144 1,986 4,243 3,931 Amortization of debt issuance costs 14 13 28 26 Total interest expense related to the Notes $ 2,922 $ 2,763 $ 5,799 $ 5,485 As of October 2, 2016, the Company’s aggregate future principal debt maturities are as follows: Fiscal Year October 2, 2016 (in thousands) 2019 $ 175,000 Total $ 175,000 The Notes are shown in the accompanying condensed 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 Notes as of October 2, 2016 was $169.6 million. The fair value of the 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	6 Months Ended
	Oct. 02, 2016
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 thereunder on the first business day of each fiscal year, 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 3.7 million shares for fiscal year 2017. Under the 2011 Plan, the Board of Directors may grant either incentive stock options, nonqualified stock options, or stock awards to eligible persons, including employees, nonemployees, members of the Board of Directors, consultants and other independent advisors who provide services to the Company. The Company’s 2004 Stock Incentive Plan (the “2004 Plan”), was adopted by the Company’s board of directors and approved by the Company’s stockholders on April 13, 2004, and was last amended on August 31, 2011. The 2004 Plan provides for the grant of incentive stock options, within the meaning of Section 422 of the Internal Revenue Code of 1986, as amended, to employees and any parent and subsidiary corporation’s employees, and for the grant of non-qualified stock options and restricted stock to employees, directors and consultants and any parent and subsidiary corporation’s employees. The Company has not granted any additional awards under the 2004 Plan following the completion of the Company’s initial public offering in November 2011. However, the 2004 Plan continues to govern the terms and conditions of outstanding awards granted thereunder. 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 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 2011 Plan and 2004 Plan (the “Plans”) are as follows (in thousands, except per share amounts): Options issued and outstanding Weighted- exercise price Weighted- remaining contractual term (in years) Aggregate intrinsic value Balance — April 3, 2016 10,126 $ 12.76 7.53 $ 5,016 Options granted 2,860 5.95 Exercised options (33 ) 6.40 Cancelled options (981 ) 14.98 Balance — October 2, 2016 11,972 $ 10.97 7.67 $ 6,622 Vested and expected to vest — October 2, 2016 10,636 $ 11.22 7.49 $ 5,461 Exercisable — October 2, 2016 5,462 $ 11.83 6.25 $ 2,349 Valuation of stock-based awards The Company applies the provisions of ASC 718-10 “Compensation—Stock Compensation” which establishes the accounting for stock-based awards based on the fair value of the award measured at grant date. Accordingly, stock-based compensation cost is recognized in the condensed consolidated statements of operations 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. The Company uses historical experience to estimate expected term. The expected volatility was based on the historical stock volatilities of the Company’s historical data with that of a peer group of publicly listed companies over a period equal to the expected terms. The risk-free interest rate is based on U.S. Treasury zero-coupon issues with remaining terms similar to the expected term. The Company does not anticipate paying any cash dividends in the foreseeable future and, therefore, uses an expected dividend yield of zero. The aggregate intrinsic value of the stock options exercised during the three and six months ended October 2, 2016 was $9,000 and $32,000, respectively. The aggregate intrinsic value of the stock options exercised during the three and six months ended September 27, 2015 was $0.4 million and $2.6 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 October 2, 2016, the remaining unamortized stock-based compensation expense, reduced for estimated forfeitures related to non-vested options, was $17.4 million to be amortized over a weighted-average remaining period of 3.3 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 options granted in the three and six months ended October 2, 2016 and September 27, 2015 Three Months Ended Six Months Ended October 2, September 27, October 2, September 27, 2016 2015 2016 2015 Expected term (in years) 5.5 5.1 5.5 5.1 Volatility 51.2 % 44.4 % 49.2 % 45.1 % Risk-free interest rate 1.2 % 1.5 % 1.4 % 1.5 % Dividend rate 0 % 0 % 0 % 0 % The weighted-average grant date fair value of the Company’s stock options granted in the three and six month ended October 2, 2016 was $3.60 and $2.72 per share, respectively. The weighted-average grant date fair value of the Company’s stock options granted in the three and six month ended September 27, 2015 was $5.33 and $6.06 per share, respectively. Restricted stock units and restricted stock Restricted stock unit and restricted stock activity of the Company under the Plans are as follows: Shares Weighted Average Grant Date Fair Value Per Share (in thousands, except per share amount) Restricted stock units and restricted stock activities Unvested at April 3, 2016 4,972 $ 13.47 Granted 1,320 6.54 Released (604 ) 15.76 Forfeited (446 ) 14.02 Unvested at October 2, 2016 5,242 $ 11.41 Restricted stock units and restricted stock granted to employees are generally subject to the employee’s continued service to the Company over the vesting 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. As of October 2, 2016, the remaining unamortized stock-based compensation expense, reduced for estimated forfeitures related to non-vested restricted stock units and restricted stock, was $38.1 million to be amortized over a weighted-average remaining period of 2.6 years. The weighted-average grant-date fair value per share of restricted stock units and restricted stock awarded in the three and six months ended October 2, 2016 was $7.46 and $6.54 per share, respectively. The weighted-average grant-date fair value per share of restricted stock units and restricted stock awarded in the three and six months ended September 27, 2015 was $11.77 and $14.20 per share, respectively. 2013 Employee stock purchase plan Under the 2013 Employee Stock Purchase Plan, as amended (the “ESPP”), 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 ESPP 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 ESPP). Each offering period consists of one purchase period of approximately six months duration. At the 2016 and 2015 annual meetings of stockholders, stockholders of the Company approved amendments to the ESPP to increase the number of shares of common stock reserved for future issuance by 2,000,000 shares and 1,000,000 shares, respectively, which brought the total amount of common stock reserved for issuance pursuant to the ESPP to an aggregate of 3,400,000 shares. As of October 2, 2016, 722,000 shares had been purchased pursuant to the ESPP. Compensation expense recognized in connection with the ESPP was $0.3 million and $0.5 million for the three and six months ended October 2, 2016. Compensation expense recognized in connection with the ESPP was $0.2 million and $0.5 million for the three and six months ended September 27, 2015. Common stock As of October 2, 2016 and April 3, 2016, common stock reserved for future issuance was as follows: October 2, 2016 April 3, 2016 (in thousands) Common stock reserved for issuance Stock plans Outstanding stock options 11,972 10,126 Outstanding restricted stock units and restricted stock 5,242 4,972 Reserved for future equity incentive grants 10,281 9,295 27,495 24,393 ESPP 2,678 1,000 Shares issuable upon exercise of warrants to purchase common stock 7,995 7,995 Total common stock reserved for future issuance 38,168 33,388 Stock-based compensation expense Total employee stock-based compensation cost for the Company’s stock plans for the three and six months ended October 2, 2016 and September 27, 2015 is as follows: Three Months Ended Six Months Ended October 2, September 27, October 2, September 27, 2016 2015 2016 2015 (in thousands) Cost of revenue $ 571 $ 584 $ 1,187 $ 1,184 Research and development 4,217 4,002 8,291 7,838 Selling, general and administrative 4,257 4,462 7,743 8,661 Total stock-based compensation expense $ 9,045 $ 9,048 $ 17,221 $ 17,683

Income taxes

Income taxes	6 Months Ended
	Oct. 02, 2016
Income Tax Disclosure [Abstract]
Income taxes	7. Income taxes In the three and six months ended October 2, 2016, the Company recorded an income tax provision of $0.2 million and $2.1 million, respectively. In the three and six months ended September 27, 2015, the Company recorded an income tax provision (benefit) of ($2.0) million and ($1.7) million, respectively. The primary difference between the 2016 effective tax rate and the federal statutory tax rate relates to the valuation allowances on certain of the Company’s net operating losses and tax credits, foreign tax rate differences, integration of acquired technologies, and non-deductible stock-based compensation expense. On July 27, 2015, the Tax Court issued an opinion (Altera Corp. et al. v. Commissioner) regarding the treatment of stock-based compensation expense in intercompany cost-sharing arrangements. However, U.S. Treasury has not withdrawn the requirement to include stock-based compensation from its regulations. Also, there is uncertainty related to the Internal Revenue Service (“IRS”) response to the Tax Court opinion, the final resolution of this issue, and the potential favorable benefits to the Company. As such, no impact will be recorded at this time. The Company will continue to monitor developments related to this opinion and the potential impact of those developments on the Company’s current and prior fiscal years. The Company does not provide for federal income taxes on undistributed earnings of its foreign subsidiaries because it is the Company’s intent to reinvest earnings indefinitely offshore. As of October 2, 2016, the total amount of gross unrecognized tax benefits was $34.2 million. If the gross unrecognized tax benefits as of October 2, 2016 were realized in a subsequent period, this would result in a tax benefit of $18.5 million within the provision of income taxes at such time. The Company is currently under examination by the IRS for the 2011 through 2014 tax years. The Company may be subject to examination by California for tax years 2010 and forward. The Company is subject to routine examination for tax years 2008 and forward in various foreign tax jurisdictions in which it operates. The Company is engaged in discussions and negotiations with the IRS regarding tax matters in the tax years 2011 through 2014. The balance of the gross unrecognized tax benefits may decrease within the next twelve months due to lapses of applicable statutes of limitations and the completion of tax review cycles in various tax jurisdictions. The Company is pursuing all available administrative remedies relative to these matters. Management believes that the Company has adequately provided for any reasonably foreseeable outcomes related to these proposed adjustments and the ultimate resolution of these matters is unlikely to have a material effect on the Company’s consolidated financial condition or results of operations; however there is still a possibility that an adverse outcome of these matters could have a material effect on its consolidated financial condition and results of operations.

Acquisition

Acquisition	6 Months Ended
	Oct. 02, 2016
Business Combinations [Abstract]
Acquisition	8. Acquisition The Company completed one acquisition in fiscal year 2017 and one acquisition in fiscal year 2016. The acquisitions have been accounted for under ASC 805. Under ASC 805, 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. Fiscal year 2017 In August 2016, the Company acquired the pressure sensor business from Sensirion Holding AG and its affiliates used in the development of capacitive-type monolithic digital pressure-sensor technology platform. The preliminary purchase price allocation reflected that the purchase price associated with the acquisition was approximately $9.8 million, of which $5.7 million was allocated to developed technology with an estimated useful life of six years and $4.1 million was allocated to goodwill. This acquisition is not significant to the Company’s results of operations. Fiscal year 2016 In December 2015, the Company acquired certain assets of Spirit Corp LLC and its affiliates used in the development of navigation solutions. The total cash consideration associated with the acquisition was approximately $7 million for which the purchase price was attributable to the acquired in-process research and development. The fair value of in-process research and development was determined using a cost approach, which includes an estimate of time and expenses required to recreate the intangible asset. The Company also will record approximately $1 million post-acquisition expense that may be payable in the future should certain specified milestones be met. This acquisition is not significant to the Company’s results of operations.

Goodwill and intangible assets

Goodwill and intangible assets	6 Months Ended
	Oct. 02, 2016
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. There were no changes in the carrying amount of goodwill since April 3, 2016. The Company performs the annual goodwill impairment analysis during the third quarter of each fiscal year. As of and for the six months ended October 2, 2016, the Company concluded that the $143.3 million of goodwill was not impaired. 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 (“IPR&D”) is assessed for impairment until the development is completed and products are available for sale. During the six months ended October 2, 2016, one IPR&D project was released to production. The IPR&D value allocated to this project of $1.6 million was transferred to developed technology. The estimated useful life for this technology was five years. In fiscal year 2016, two IPR&D projects were released to production. The IPR&D value allocated to the projects of $3.3 million and $1.7 million, respectively, were transferred to developed technology. The estimated useful life for each technology is five years. Amortization for acquired intangible assets for the three and six months ended October 2, 2016 was approximately $2.5 million and $4.9 million, respectively. Amortization for acquired intangible assets for the three and six months ended September 27, 2015 was approximately $2.4 million and $4.5 million, respectively. The following table represents intangible assets and accumulated amortization: October 2, 2016 Accumulated Gross amortization Net (in thousands) Developed technology $ 56,580 $ 21,746 $ 34,834 Customer relationships 1,560 650 910 Patents 2,120 626 1,494 Total intangible assets subject to amortization 60,260 23,022 37,238 IPR&D 6,750 — 6,750 Total intangible assets, net $ 67,010 $ 23,022 $ 43,988 April 3, 2016 Accumulated Gross amortization Net (in thousands) Developed technology $ 49,310 $ 17,159 $ 32,151 Customer relationships 1,560 539 1,021 Patents 2,120 443 1,677 Total intangible assets subject to amortization 52,990 18,141 34,849 IPR&D 8,320 — 8,320 Total intangible assets, net $ 61,310 $ 18,141 $ 43,169 The estimated future amortization expense related to intangible assets at October 2, 2016, is as follows: Estimated amortization Fiscal Year (in thousands) 2017 (remainder) $ 5,382 2018 10,764 2019 10,764 2020 6,820 2021 2,057 Thereafer 1,451 Total $ 37,238

Organization and summary of s16

Organization and summary of significant accounting policies (Policies)	6 Months Ended
	Oct. 02, 2016
Accounting Policies [Abstract]
Business	Business InvenSense, Inc. (the “Company”) was incorporated in California in June 2003 and reincorporated in Delaware in January 2004. The Company designs, develops, markets and sells 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. The Company targets 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. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes thereto for the fiscal year ended April 3, 2016 included in the Company’s Annual Report on Form 10-K filed on May 25, 2016 with the Securities and Exchange Commission (“SEC”). No material changes have been made to the Company’s significant accounting policies since the Company’s Annual Report on Form 10-K for the fiscal year ended April 3, 2016.
Certain significant business risks and uncertainties	Certain significant business risks and uncertainties The Company participates in the high-technology industry and believes that a number of factors including, but not limited to the following could have a material effect on the Company’s future financial position, results of operations, or cash flows: reliance on a limited number of primary customers to support the Company’s revenue generating activities; changes in end-user demand for the products manufactured and sold by the Company and its customers; the receipt, reduction, cancellation or delay of significant orders by customers; advances and trends in new technologies and industry standards; new product announcements and introductions by the Company’s competitors; the general cyclicality and seasonality of the semiconductor and consumer electronics industries and the resulting effect on the Company’s business; market acceptance of the Company’s and its customers’ products; the Company’s development and introduction of new products on a timely basis; developing new sales channels and attracting new customers; significant warranty claims, including those not covered by the Company’s suppliers; delays in the Company’s customers’ ability to manufacture and ship products that incorporate the Company’s products caused by internal and external factors unrelated to the Company’s business and that are out of its control; shortages of key third party components; the effects of competitive pricing pressures, including decreases in average selling prices of the Company’s products; write-downs of inventory for excess quantity, changes in business priorities, technological obsolescence and erosion in net realizable value; strategic relationships, including key component suppliers; litigation or claims against the Company based on intellectual property, patent, product, regulatory, or other factors; and the Company’s ability to attract and retain employees necessary to support its growth. Further information on potential risks that could affect the Company’s business and financial results is included in the Company’s Annual Report on Form 10-K for the year ended April 3, 2016 filed with SEC on May 25, 2016.
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 the Company’s accounts and the accounts of its 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 condensed consolidated statements of operations.
Fiscal year	Fiscal year The Company’s fiscal year is a 52 or 53 week period ending on the Sunday closest to March 31. Fiscal year 2016 was a 53-week fiscal year ended April 3, 2016 (“Fiscal year 2016”). The extra week was included in the Company’s fourth fiscal quarter ended April 3, 2016. The Company’s fiscal year ended March 29, 2015 (“fiscal year 2015”) was comprised of 52 weeks. The first and second fiscal quarters in each of the two most recent fiscal years included 13 weeks.
Basis of presentation	Basis of presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with GAAP and applicable rules and regulations of the SEC regarding interim financial reporting. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. The condensed consolidated balance sheet as of April 3, 2016, included herein was derived from the audited financial statements as of that date, but does not include all disclosures required by GAAP. The unaudited interim condensed consolidated financial statements, in the opinion of management, reflect adjustments, consisting of all normal recurring adjustments, necessary to present fairly the Company’s financial position, results of operations, comprehensive loss and cash flows for the interim periods. The results of operations for the period ended October 2, 2016 is not necessarily indicative of the results to be expected for the fiscal year ending April 2, 2017 or for any future year or interim period.
Use of estimates	Use of estimates The preparation of the Company’s condensed consolidated financial statements and related notes in conformity with 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 condensed consolidated financial statements and related notes and the reported amounts of income and expenses during the reporting period. Significant estimates included in the condensed consolidated financial statements and related notes include income taxes, inventory valuation, stock-based compensation, loss contingencies, warranty reserves, goodwill, valuation of acquired assets, and valuation of convertible senior note, including the related convertible notes hedges and warrants. These estimates are based upon information available as of the date of the condensed consolidated financial statements, and actual results could differ from those estimates.
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 Standard 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. 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 has determined that it has a single reporting unit for purposes of performing its goodwill impairment test. 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 performs the annual goodwill impairment analysis in the third quarter of each fiscal year. As of October 2, 2016, no events or changes in circumstances indicate the carrying value may not be recoverable.
Concentration of credit risk	Concentration of credit risk The majority of the Company’s products are shipped to distributors, original design manufacturers and contract manufacturers (collectively referred to as “intermediaries”), who are the legal counter-parties to the Company’s sales. When the Company references customers, sales and revenue in this report, the Company is referring to the manufacturers of consumer electronics devices who are the end customers for our products. However, any disclosure about the composition of the Company’s accounts receivable refers to the intermediaries. Some of the Company’s intermediaries may serve more than one of the Company’s customers. As a result, attempting to compare or correlate disclosures about the Company’s accounts receivable composition as of a particular date with the disclosures regarding revenues generated by the Company’s customers for the period ending on the same date can be difficult or misleading. One distributor accounted for 66% of accounts receivable and one customer accounted for 14% of accounts receivable at October 2, 2016. One distributor accounted for 49% of accounts receivable and one customer accounted for 20% of accounts receivable at September 27, 2015. For the three months ended October 2, 2016, Apple Inc. (“Apple”) and GH Development Holdings Limited (“GHIC”) accounted for 58% and 11% of total net revenue, respectively. For the three months ended September 27, 2015, Apple and Samsung Electronics Co., Ltd. (“Samsung”) accounted for 34% and 19% of total net revenue, respectively. For the six months ended October 2, 2016, Apple accounted for 53% of net revenue. For the six months ended September 27, 2015, Apple and Samsung accounted for 36% and 21% of total net revenue, respectively.
Warranty	Warranty The Company offers one year standard warranty on its products. In selective cases, the warranty period can be extended to multiple years. The Company’s accrual for anticipated warranty costs includes management’s judgment regarding anticipated rates of warranty claims and associated repair costs. The following table summarizes the activity related to product warranty liability during the six months ended October 2, 2016 and September 27, 2015: Six Months Ended October 2, September 27, (in thousands) Beginning balance $ 625 $ 341 Provision for warranty 682 421 Adjustments related to changes in estimate (519 ) (204 ) Less: actual warranty costs (18 ) (82 ) Ending balance $ 770 $ 476
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. In periods in which the Company has reported a net loss, the common stock equivalents are excluded from the calculation of diluted net loss per share of common stock as their effect is antidilutive under the treasury stock method. The following table presents the calculation of basic and diluted net income (loss) per share: Three Months Ended Six Months Ended October 2, September 27, October 2, September 27, (in thousands, except per share data) Numerator: Basic and diluted Net income (loss) $ (12,510 ) $ 5,693 $ (32,695 ) $ (154 ) Denominator: Basic shares: Weighted-average shares used in computing basic net income (loss) per share 93,657 91,574 93,447 91,325 Diluted shares: Weighted-average shares used in computing basic net income (loss) per share 93,657 91,574 93,447 91,325 Effect of potentially dilutive securities: Stock options and unvested restricted stock — 995 — — Weighted-average shares used in computing diluted net income (loss) per share 93,657 92,569 93,447 91,325 Net income (loss) per share Basic $ (0.13 ) $ 0.06 $ (0.35 ) $ (0.00 ) Diluted $ (0.13 ) $ 0.06 $ (0.35 ) $ (0.00 ) The following summarizes the potentially dilutive securities outstanding at the end of each period that were excluded from the computation of diluted net income (loss) per share for the periods presented as their effect would have been antidilutive: Three Months Ended Six Months Ended October 2, September 27, October 2, September 27, 2016 2015 2016 2015 (in thousands) Employee stock options 12,033 7,382 11,609 9,059 Unvested restricted stock units 5,212 2,989 5,112 4,204 Total antidilutive securities 17,245 10,371 16,721 13,263 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).
Segment information	Segment information The Company operates in one operating segment, the design, development, manufacture and marketing of 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 (“FASB”) ASC 280 “Segment Reporting”. Enterprise-wide information is provided in accordance with ASC 280. Geographical revenue information is based on the location of the head offices of the Company’s customers. Property and equipment information is based on the physical location of the assets at the end of each fiscal period. Property and equipment, net by country was as follows: October 2, April 3, Country 2016 2016 (in thousands) Taiwan $ 22,325 $ 25,183 United States 8,861 9,207 Other 1,954 1,881 $ 33,140 $ 36,271 Net revenue from unaffiliated customers by location of the Company’s customers’ headquarters offices was as follows: Three Months Ended Six Months Ended October 2, September 27, October 2, September 27, Region 2016 2015 2016 2015 (in thousands) United States $ 50,193 $ 42,913 $ 80,298 $ 86,716 China 14,844 26,010 27,290 50,616 Korea 5,074 24,469 10,868 53,192 Japan 4,873 8,028 10,153 12,164 Taiwan 3,583 7,576 9,008 10,762 Rest of world 1,264 3,549 2,850 5,391 $ 79,831 $ 112,545 $ 140,467 $ 218,841 A majority of sales to U.S. headquartered companies are sold to their distributors or contract manufacturers located overseas.
Recent accounting pronouncements	Recent accounting pronouncements In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses. Under the new guidance, credit losses for certain types of financial instruments will be estimated based on expected losses. The new guidance also modifies the impairment models for available-for-sale debt securities and for purchased financial assets with credit deterioration since their origination. The new guidance will be effective for the Company starting in the first quarter of fiscal 2021. Early adoption is permitted starting in the first quarter of fiscal 2020. The Company is in the process of determining the effects the adoption will have on its consolidated financial statements as well as whether to adopt the new guidance early. In March, 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting, which amends ASC Topic 718, Compensation—Stock Compensation. The new guidance simplifies several aspects of the accounting for employee share-based payment transactions for both public and nonpublic entities, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements, as well as classification in the statement of cash flows. The new guidance will be effective for the Company starting in the first quarter of fiscal 2018. Early adoption is permitted in any annual or interim period. The Company is in the process of determining the effects the adoption will have on its consolidated financial statements as well as whether to adopt the new guidance early. In February 2016, the FASB issued new guidance related to leases that outlines a comprehensive lease accounting model and supersedes the current lease guidance. The new guidance requires lessees to recognize lease liabilities and corresponding right-of-use assets for all leases with lease terms of greater than 12 months. It also changes the definition of a lease and expands the disclosure requirements of lease arrangements. The new guidance must be adopted using the modified retrospective approach and will be effective for the Company starting in the first quarter of fiscal 2020. Early adoption is permitted. The Company is in the process of determining the effects the adoption will have on its consolidated financial statements as well as whether to adopt the new guidance early. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606). ASU No. 2014-09 provides guidance that companies will recognize revenue to depict the transfer of goods or services to customers in amounts that reflect the payment to which a company expects to be entitled in exchange for those goods or services. The 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 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.
Fair Value Measurements	The Company applies the provisions of ASC 820-10, “ Fair Value Measurements 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 s17

Organization and summary of significant accounting policies (Tables)	6 Months Ended
	Oct. 02, 2016
Accounting Policies [Abstract]
Summary of Activity Related to Product Warranty Liability	The following table summarizes the activity related to product warranty liability during the six months ended October 2, 2016 and September 27, 2015: Six Months Ended October 2, September 27, (in thousands) Beginning balance $ 625 $ 341 Provision for warranty 682 421 Adjustments related to changes in estimate (519 ) (204 ) Less: actual warranty costs (18 ) (82 ) Ending balance $ 770 $ 476
Calculation of Basic and Diluted Net Income (Loss) Per Share	The following table presents the calculation of basic and diluted net income (loss) per share: Three Months Ended Six Months Ended October 2, September 27, October 2, September 27, (in thousands, except per share data) Numerator: Basic and diluted Net income (loss) $ (12,510 ) $ 5,693 $ (32,695 ) $ (154 ) Denominator: Basic shares: Weighted-average shares used in computing basic net income (loss) per share 93,657 91,574 93,447 91,325 Diluted shares: Weighted-average shares used in computing basic net income (loss) per share 93,657 91,574 93,447 91,325 Effect of potentially dilutive securities: Stock options and unvested restricted stock — 995 — — Weighted-average shares used in computing diluted net income (loss) per share 93,657 92,569 93,447 91,325 Net income (loss) per share Basic $ (0.13 ) $ 0.06 $ (0.35 ) $ (0.00 ) Diluted $ (0.13 ) $ 0.06 $ (0.35 ) $ (0.00 )
Securities Excluded from Computation of Diluted Net Income (Loss) Per Share	The following summarizes the potentially dilutive securities outstanding at the end of each period that were excluded from the computation of diluted net income (loss) per share for the periods presented as their effect would have been antidilutive: Three Months Ended Six Months Ended October 2, September 27, October 2, September 27, 2016 2015 2016 2015 (in thousands) Employee stock options 12,033 7,382 11,609 9,059 Unvested restricted stock units 5,212 2,989 5,112 4,204 Total antidilutive securities 17,245 10,371 16,721 13,263
Property and Equipment, Net by Country	Property and equipment, net by country was as follows: October 2, April 3, Country 2016 2016 (in thousands) Taiwan $ 22,325 $ 25,183 United States 8,861 9,207 Other 1,954 1,881 $ 33,140 $ 36,271
Net Revenue from Unaffiliated Customers by Location	Net revenue from unaffiliated customers by location of the Company’s customers’ headquarters offices was as follows: Three Months Ended Six Months Ended October 2, September 27, October 2, September 27, Region 2016 2015 2016 2015 (in thousands) United States $ 50,193 $ 42,913 $ 80,298 $ 86,716 China 14,844 26,010 27,290 50,616 Korea 5,074 24,469 10,868 53,192 Japan 4,873 8,028 10,153 12,164 Taiwan 3,583 7,576 9,008 10,762 Rest of world 1,264 3,549 2,850 5,391 $ 79,831 $ 112,545 $ 140,467 $ 218,841

Cash equivalents and availabl18

Cash equivalents and available-for-sale investments (Tables)	6 Months Ended
	Oct. 02, 2016
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 condensed consolidated balance sheet as of October 2, 2016. October 2, Quoted prices in active markets Significant Significant balance Level 1 Level 2 Level 3 (in thousands) Assets Money market funds $ 29,891 $ 29,891 $ — $ — Corporate notes and bonds 91,672 — 91,672 — Commercial paper 116,604 — 116,604 — U.S. agency securities 30,845 — 30,845 — Total investments $ 269,012 $ 29,891 $ 239,121 $ — Liabilities Contingent consideration $ 1,909 $ — $ — $ 1,909 Assets Cash equivalents $ 29,891 $ 29,891 $ — $ — Short-term investments 239,121 — 239,121 — Total investments $ 269,012 $ 29,891 $ 239,121 $ — Liabilities Accrued liabilities $ 1,909 $ — $ — $ 1,909 Total contingent consideration $ 1,909 $ — $ — $ 1,909 October 2, Gross Gross October 2, 2016 unrealized unrealized 2016 amortized cost gain loss estimated FMV (in thousands) Corporate notes and bonds $ 91,763 $ 1 $ (92 ) $ 91,672 Commercial paper 116,770 1 (167 ) 116,604 U.S. agency securities 30,829 16 — 30,845 Total available-for-sale investments $ 239,362 $ 18 $ (259 ) 239,121 Money market funds 29,891 Total aggregate fair value $ 269,012 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. None of the gross unrealized losses as of October 2, 2016 were considered to be other-than-temporary impairments. There were no transfers of assets measured at fair value between Level 1 and Level 2 during the six months ended October 2, 2016. April 3, 2016: Assets and liabilities measured at fair value on a recurring basis were presented in the Company’s condensed consolidated balance sheet as of April 3, 2016. April 3, balance Quoted prices in active markets for identical Level 1 Significant other observable inputs Level 2 Significant other unobservable inputs Level 3 (in thousands) Assets Money market funds $ 15,697 $ 15,697 $ — $ — Corporate notes and bonds 163,675 — 163,675 — Commercial paper 45,473 — 45,473 — U.S. agency securities 34,607 — 34,607 — Total investments $ 259,452 $ 15,697 $ 243,755 $ — Liabilities Contingent consideration $ 1,909 $ — $ — $ 1,909 Assets Cash equivalents $ 15,697 $ 15,697 $ — $ — Short-term investments 243,755 — 243,755 — Total investments $ 259,452 $ 15,697 $ 243,755 $ — Liabilities Accrued liabilities $ 1,909 $ — $ — $ 1,909 Total contingent consideration $ 1,909 $ — $ — $ 1,909 April 3, 2016 Gross Gross April 3, 2016 (in thousands) Corporate notes and bonds $ 163,712 $ 19 $ (56 ) $ 163,675 Commercial paper 45,480 3 (10 ) 45,473 U.S. agency securities 34,589 25 (7 ) 34,607 Total available-for-sale investments $ 243,781 $ 47 $ (73 ) 243,755 Money market funds 15,697 Total aggregate fair value $ 259,452
Summary of Changes in Fair Value of Company's Contingent Consideration Categorized in 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 three and six months ended October 2, 2016 and September 27, 2015: Three Months Ended Six Months Ended October 2, September 27, October 2, September 27, 2016 2015 2016 2015 (in thousands) Beginning balance $ 1,909 $ 3,817 $ 1,909 $ 9,124 Change in fair value and other — — — (5,307 ) Ending balance $ 1,909 $ 3,817 $ 1,909 $ 3,817
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)	6 Months Ended
	Oct. 02, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Inventories	Inventories at October 2, 2016 and April 3, 2016 consist of the following: October 2, 2016 April 3, 2016 (in thousands) Work in process $ 30,381 $ 40,329 Finished goods 15,720 21,968 Total inventories $ 46,101 $ 62,297
Prepaid expenses and other current assets	Prepaid expenses and other current assets at October 2, 2016 and April 3, 2016 consist of the following: October 2, 2016 April 3, 2016 (in thousands) Prepaid expenses $ 5,647 $ 5,256 Income tax receivable 42 156 Other receivables 1,031 1,676 Other current assets 2,467 2,162 Total prepaid expenses and other current assets $ 9,187 $ 9,250
Property and equipment	Property and equipment at October 2, 2016 and April 3, 2016 consists of the following: October 2, 2016 April 3, 2016 (in thousands) Production and lab equipment $ 55,083 $ 52,821 Computer equipment and software 10,410 9,074 Equipment under construction 678 607 Leasehold improvements and furniture and fixtures 8,400 8,396 Subtotal 74,571 70,898 Accumulated depreciation and amortization (41,431 ) (34,627 ) Property and equipment—net $ 33,140 $ 36,271
Accrued liabilities	Accrued liabilities at October 2, 2016 and April 3, 2016 consist of the following: October 2, 2016 April 3, 2016 (in thousands) Payroll-related expenses $ 8,569 $ 8,030 Bonuses 3,686 5,040 Contingent consideration, current portion 1,909 1,909 Deferred revenue 1,618 1,949 Legal fees 694 197 Accrued contractual coupon interest payable on convertible senior notes 1,316 1,313 Income tax payable 1,150 553 Other tax payable 768 768 Customer deposits 2,582 4,008 Other accrued liabilities 8,831 6,481 Total accrued liabilities $ 31,123 $ 30,248
Other long-term liabilities	Other long-term liabilities at October 2, 2016 and April 3, 2016 consists of the following: October 2, 2016 April 3, 2016 (in thousands) Long-term tax payable $ 14,943 $ 13,928 Deferred rent 3,001 3,436 Deferred tax liabilities 2,554 3,026 Deferred revenue 3,700 4,100 Long-term debt 2,412 2,465 Other long-term liabilities 93 275 Total other long-term liabilities $ 26,703 $ 27,230

Commitments and contingencies (

Commitments and contingencies (Tables)	6 Months Ended
	Oct. 02, 2016
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 October 2, 2016 are as follows: Amount Fiscal Years Ending: (in thousands) 2017 (remainder) $ 2,949 2018 6,524 2019 6,691 2020 5,339 2021 1,406 Beyond 514 Total $ 23,423

Convertible senior notes (Table

Convertible senior notes (Tables)	6 Months Ended
	Oct. 02, 2016
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: October 2, 2016 April 3, 2016 (in thousands) Principal amount of the Notes $ 175,000 $ 175,000 Unamortized discount on the Notes 19,565 23,809 Unamortized debt issuance costs 125 153 Net carrying value $ 155,310 $ 151,038
Schedule of Interest Expense Recognized Related to Notes	The following table presents the amount of interest expense recognized related to the Notes: Three Months Ended Six Months Ended October 2, September 27, October 2, September 27, 2016 2015 2016 2015 (in thousands) Contractual coupon interest expense $ 764 $ 764 $ 1,528 $ 1,528 Accretion of debt discount 2,144 1,986 4,243 3,931 Amortization of debt issuance costs 14 13 28 26 Total interest expense related to the Notes $ 2,922 $ 2,763 $ 5,799 $ 5,485
Schedule of Aggregate Future Principal Debt Maturities	As of October 2, 2016, the Company’s aggregate future principal debt maturities are as follows: Fiscal Year October 2, 2016 (in thousands) 2019 $ 175,000 Total $ 175,000

Stockholders' equity (Tables)

Stockholders' equity (Tables)	6 Months Ended
	Oct. 02, 2016
Equity [Abstract]
Stock Option Activities	Stock option activities of the Company under the 2011 Plan and 2004 Plan (the “Plans”) are as follows (in thousands, except per share amounts): Options issued and outstanding Weighted- exercise price Weighted- remaining contractual term (in years) Aggregate intrinsic value Balance — April 3, 2016 10,126 $ 12.76 7.53 $ 5,016 Options granted 2,860 5.95 Exercised options (33 ) 6.40 Cancelled options (981 ) 14.98 Balance — October 2, 2016 11,972 $ 10.97 7.67 $ 6,622 Vested and expected to vest — October 2, 2016 10,636 $ 11.22 7.49 $ 5,461 Exercisable — October 2, 2016 5,462 $ 11.83 6.25 $ 2,349
Weighted-Average Assumptions in Determining Stock-Based Compensation Expense Options Granted	The Company used the following weighted-average assumptions in determining stock-based compensation expense for options granted in the three and six months ended October 2, 2016 and September 27, 2015 Three Months Ended Six Months Ended October 2, September 27, October 2, September 27, 2016 2015 2016 2015 Expected term (in years) 5.5 5.1 5.5 5.1 Volatility 51.2 % 44.4 % 49.2 % 45.1 % Risk-free interest rate 1.2 % 1.5 % 1.4 % 1.5 % Dividend rate 0 % 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: Shares Weighted Average Grant Date Fair Value Per Share (in thousands, except per share amount) Restricted stock units and restricted stock activities Unvested at April 3, 2016 4,972 $ 13.47 Granted 1,320 6.54 Released (604 ) 15.76 Forfeited (446 ) 14.02 Unvested at October 2, 2016 5,242 $ 11.41
Common Stock Reserved for Future Issuance	As of October 2, 2016 and April 3, 2016, common stock reserved for future issuance was as follows: October 2, 2016 April 3, 2016 (in thousands) Common stock reserved for issuance Stock plans Outstanding stock options 11,972 10,126 Outstanding restricted stock units and restricted stock 5,242 4,972 Reserved for future equity incentive grants 10,281 9,295 27,495 24,393 ESPP 2,678 1,000 Shares issuable upon exercise of warrants to purchase common stock 7,995 7,995 Total common stock reserved for future issuance 38,168 33,388
Summary of Total Stock-Based Compensation Cost	Total employee stock-based compensation cost for the Company’s stock plans for the three and six months ended October 2, 2016 and September 27, 2015 is as follows: Three Months Ended Six Months Ended October 2, September 27, October 2, September 27, 2016 2015 2016 2015 (in thousands) Cost of revenue $ 571 $ 584 $ 1,187 $ 1,184 Research and development 4,217 4,002 8,291 7,838 Selling, general and administrative 4,257 4,462 7,743 8,661 Total stock-based compensation expense $ 9,045 $ 9,048 $ 17,221 $ 17,683

Goodwill and intangible assets

Goodwill and intangible assets (Tables)	6 Months Ended
	Oct. 02, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Intangible Assets and Accumulated Amortization	The following table represents intangible assets and accumulated amortization: October 2, 2016 Accumulated Gross amortization Net (in thousands) Developed technology $ 56,580 $ 21,746 $ 34,834 Customer relationships 1,560 650 910 Patents 2,120 626 1,494 Total intangible assets subject to amortization 60,260 23,022 37,238 IPR&D 6,750 — 6,750 Total intangible assets, net $ 67,010 $ 23,022 $ 43,988 April 3, 2016 Accumulated Gross amortization Net (in thousands) Developed technology $ 49,310 $ 17,159 $ 32,151 Customer relationships 1,560 539 1,021 Patents 2,120 443 1,677 Total intangible assets subject to amortization 52,990 18,141 34,849 IPR&D 8,320 — 8,320 Total intangible assets, net $ 61,310 $ 18,141 $ 43,169
Estimated Future Amortization Expense Related to Intangible Assets	The estimated future amortization expense related to intangible assets at October 2, 2016, is as follows: Estimated amortization Fiscal Year (in thousands) 2017 (remainder) $ 5,382 2018 10,764 2019 10,764 2020 6,820 2021 2,057 Thereafer 1,451 Total $ 37,238

Organization and Summary of S24

Organization and Summary of Significant Accounting Policies - Additional Information (Detail)	Oct. 02, 2016USD ($)CustomerDistributor$ / shares	Sep. 27, 2015CustomerDistributor	Oct. 02, 2016USD ($)$ / shares	Sep. 27, 2015	Oct. 02, 2016USD ($)Segment$ / shares	Sep. 27, 2015	Apr. 03, 2016USD ($)$ / shares	Nov. 30, 2013USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Incorporation month and year					2003-06
Period of Company's warranty agreements					1 year
Convertible senior notes, issuance date					2013-11		2013-11
Convertible senior notes, principal amount	$ 175,000,000		$ 175,000,000		$ 175,000,000		$ 175,000,000
Convertible senior notes, conversion ratio					45.683		45.683
Convertible senior notes, face amount per note	$ 1,000		$ 1,000		$ 1,000		$ 1,000
Convertible senior notes, conversion price | $ / shares	$ 21.89		$ 21.89		$ 21.89		$ 21.89
Number of operating segments | Segment					1
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, maturity date					Nov. 1, 2018		Nov. 1, 2018
Convertible senior notes, Stated interest rate	1.75%		1.75%		1.75%			1.75%
Accounts Receivable [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of major distributors | Distributor	1
Number of major customers | Customer	1	1
Accounts Receivable [Member] | Credit Concentration Risk [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of major distributors | Distributor		1
Accounts Receivable [Member] | Credit Concentration Risk [Member] | Distributor One [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of concentration risk	66.00%
Accounts Receivable [Member] | Credit Concentration Risk [Member] | Distributor Two [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of concentration risk		49.00%
Accounts Receivable [Member] | Credit Concentration Risk [Member] | Customer One [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of concentration risk	14.00%
Accounts Receivable [Member] | Credit Concentration Risk [Member] | Customer Two [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of concentration risk		20.00%
Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member] | Apple [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of concentration risk			58.00%	34.00%	53.00%	36.00%
Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member] | GH Development Holdings Limited [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of concentration risk			11.00%
Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member] | Samsung [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of concentration risk				19.00%		21.00%

Organization and Summary of S25

Organization and Summary of Significant Accounting Policies - Summary of Activity Related to Product Warranty Liability (Detail) - USD ($) $ in Thousands	6 Months Ended
	Oct. 02, 2016	Sep. 27, 2015
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]
Beginning balance	$ 625	$ 341
Provision for warranty	682	421
Adjustments related to changes in estimate	(519)	(204)
Less: actual warranty costs	(18)	(82)
Ending balance	$ 770	$ 476

Organization and Summary of S26

Organization and Summary of Significant Accounting Policies - Calculation of Basic and Diluted Net Income (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Basic and diluted
Net income (loss)	$ (12,510)	$ 5,693	$ (32,695)	$ (154)
Basic shares:
Weighted-average shares used in computing basic net income (loss) per share	93,657	91,574	93,447	91,325
Diluted shares:
Weighted-average shares used in computing basic net income (loss) per share	93,657	91,574	93,447	91,325
Effect of potentially dilutive securities:
Stock options and unvested restricted stock		995
Weighted-average shares used in computing diluted net income (loss) per share	93,657	92,569	93,447	91,325
Net income (loss) per share
Basic	$ (0.13)	$ 0.06	$ (0.35)	$ 0
Diluted	$ (0.13)	$ 0.06	$ (0.35)	$ 0

Organization and Summary of S27

Organization and Summary of Significant Accounting Policies - Securities Excluded from Computation of Diluted Net Income (Loss) Per Share (Detail) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total antidilutive securities	17,245	10,371	16,721	13,263
Employee Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total antidilutive securities	12,033	7,382	11,609	9,059
Unvested Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total antidilutive securities	5,212	2,989	5,112	4,204

Organization and Summary of S28

Organization and Summary of Significant Accounting Policies - Property and Equipment, Net by Country (Detail) - USD ($) $ in Thousands	Oct. 02, 2016	Apr. 03, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 33,140	$ 36,271
Taiwan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	22,325	25,183
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	8,861	9,207
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 1,954	$ 1,881

Organization and Summary of S29

Organization and Summary of Significant Accounting Policies - Net Revenue from Unaffiliated Customers by Location (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues from unaffiliated customers	$ 79,831	$ 112,545	$ 140,467	$ 218,841
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues from unaffiliated customers	50,193	42,913	80,298	86,716
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues from unaffiliated customers	14,844	26,010	27,290	50,616
Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues from unaffiliated customers	5,074	24,469	10,868	53,192
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues from unaffiliated customers	4,873	8,028	10,153	12,164
Taiwan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues from unaffiliated customers	3,583	7,576	9,008	10,762
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues from unaffiliated customers	$ 1,264	$ 3,549	$ 2,850	$ 5,391

Cash Equivalents and Availabl30

Cash Equivalents and Available-for-Sale Investments - Additional Information (Detail) - USD ($)	6 Months Ended	12 Months Ended
	Sep. 27, 2015	Apr. 03, 2016	Oct. 02, 2016	Mar. 29, 2015
Cash and Cash Equivalents [Line Items]
Cash		$ 25,400,000	$ 7,100,000
Cash and cash equivalents	$ 70,162,000	41,105,000	37,047,000	$ 85,637,000
Short-term investments available-for-sale		243,800,000	239,100,000
Transfers of assets measured at fair value between Level 1 and Level 2		0	0
Change in fair value of contingent consideration, net	$ (5,307,000)	(5,300,000)
Business acquisition, additional contingent cash payment		1,909,000	1,909,000
Money Market Funds [Member]
Cash and Cash Equivalents [Line Items]
Cash equivalents		15,700,000	29,900,000
Foreign Subsidiaries [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents		$ 21,000,000	$ 23,900,000
Movea S.A [Member] | Design Win [Member] | Maximum [Member]
Cash and Cash Equivalents [Line Items]
Percentage of reduction in probability of milestone		50.00%
Movea S.A [Member] | Design Win [Member] | Minimum [Member]
Cash and Cash Equivalents [Line Items]
Percentage of reduction in probability of milestone		0.00%
Movea S.A [Member] | Research and Development [Member] | Design Win [Member]
Cash and Cash Equivalents [Line Items]
Change in fair value of contingent consideration, net		$ (4,000,000)
Trusted Positioning, Inc. [Member]
Cash and Cash Equivalents [Line Items]
Business acquisition, final contingent cash payment		1,900,000
Trusted Positioning, Inc. [Member] | Design Win [Member]
Cash and Cash Equivalents [Line Items]
Business acquisition, additional contingent cash payment		$ 1,900,000
Trusted Positioning, Inc. [Member] | Design Win [Member] | Maximum [Member]
Cash and Cash Equivalents [Line Items]
Percentage of reduction in probability of milestone		50.00%
Trusted Positioning, Inc. [Member] | Design Win [Member] | Minimum [Member]
Cash and Cash Equivalents [Line Items]
Percentage of reduction in probability of milestone		0.00%
Trusted Positioning, Inc. [Member] | Research and Development [Member] | Design Win [Member]
Cash and Cash Equivalents [Line Items]
Change in fair value of contingent consideration, net		$ (2,400,000)
Trusted Positioning, Inc. [Member] | Research and Development [Member] | Cloud Application [Member]
Cash and Cash Equivalents [Line Items]
Change in fair value of contingent consideration, net		$ 1,100,000

Cash Equivalents and Availabl31

Cash Equivalents and Available-for-Sale Investments - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Oct. 02, 2016	Apr. 03, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	$ 269,012	$ 259,452
Accrued liabilities	1,909	1,909
Estimated FMV	239,121	243,755
Accrued Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accrued liabilities	1,909	1,909
Short-term Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	239,121	243,755
Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	29,891	15,697
Corporate Notes and Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	91,672	163,675
Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	116,604	45,473
U.S. Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	30,845	34,607
Cash Equivalents [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	29,891	15,697
Quoted Prices in Active Markets for Identical Assets or Liabilities Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	29,891	15,697
Quoted Prices in Active Markets for Identical Assets or Liabilities Level 1 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	29,891	15,697
Quoted Prices in Active Markets for Identical Assets or Liabilities Level 1 [Member] | Cash Equivalents [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	29,891	15,697
Significant Other Observable Inputs Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	239,121	243,755
Significant Other Observable Inputs Level 2 [Member] | Short-term Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	239,121	243,755
Significant Other Observable Inputs Level 2 [Member] | Corporate Notes and Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	91,672	163,675
Significant Other Observable Inputs Level 2 [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	116,604	45,473
Significant Other Observable Inputs Level 2 [Member] | U.S. Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	30,845	34,607
Significant Other Unobservable Inputs Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accrued liabilities	1,909	1,909
Significant Other Unobservable Inputs Level 3 [Member] | Accrued Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accrued liabilities	1,909	1,909
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized cost	239,362	243,781
Gross unrealized gain	18	47
Gross unrealized loss	(259)	(73)
Estimated FMV	239,121	243,755
Fair Value, Measurements, Recurring [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	29,891	15,697
Fair Value, Measurements, Recurring [Member] | Corporate Notes and Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized cost	91,763	163,712
Gross unrealized gain	1	19
Gross unrealized loss	(92)	(56)
Estimated FMV	91,672	163,675
Fair Value, Measurements, Recurring [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized cost	116,770	45,480
Gross unrealized gain	1	3
Gross unrealized loss	(167)	(10)
Estimated FMV	116,604	45,473
Fair Value, Measurements, Recurring [Member] | U.S. Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized cost	30,829	34,589
Gross unrealized gain	16	25
Gross unrealized loss		(7)
Estimated FMV	$ 30,845	$ 34,607

Cash Equivalents and Availabl32

Cash Equivalents and Available-for-Sale Investments - Summary of Changes in Fair Value of Company's Contingent Consideration Categorized in Level 3 (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Fair Value Disclosures [Abstract]
Beginning balance	$ 1,909	$ 3,817	$ 1,909	$ 9,124
Change in fair value and other	0	0	0	(5,307)
Ending balance	$ 1,909	$ 3,817	$ 1,909	$ 3,817

Cash Equivalents and Availabl33

Cash Equivalents and Available-for-Sale Investments - Summary of Significant Unobservable Inputs used in Fair Value Measurement on Recurring Basis (Detail)	6 Months Ended
	Oct. 02, 2016
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 - Invento

Balance Sheet Details - Inventories (Detail) - USD ($) $ in Thousands	Oct. 02, 2016	Apr. 03, 2016
Inventory Disclosure [Abstract]
Work in process	$ 30,381	$ 40,329
Finished goods	15,720	21,968
Total inventories	$ 46,101	$ 62,297

Balance Sheet Details - Prepaid

Balance Sheet Details - Prepaid Expenses and Other Current Assets (Detail) - USD ($) $ in Thousands	Oct. 02, 2016	Apr. 03, 2016
Balance Sheet Related Disclosures [Abstract]
Prepaid expenses	$ 5,647	$ 5,256
Income tax receivable	42	156
Other receivables	1,031	1,676
Other current assets	2,467	2,162
Total prepaid expenses and other current assets	$ 9,187	$ 9,250

Balance Sheet Details - Propert

Balance Sheet Details - Property and Equipment (Detail) - USD ($) $ in Thousands	Oct. 02, 2016	Apr. 03, 2016
Property, Plant and Equipment [Line Items]
Subtotal	$ 74,571	$ 70,898
Accumulated depreciation and amortization	(41,431)	(34,627)
Property and equipment-net	33,140	36,271
Production and Lab Equipment [Member]
Property, Plant and Equipment [Line Items]
Subtotal	55,083	52,821
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Subtotal	10,410	9,074
Equipment Under Construction [Member]
Property, Plant and Equipment [Line Items]
Subtotal	678	607
Leasehold Improvements and Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Subtotal	$ 8,400	$ 8,396

Balance Sheet Details - Additio

Balance Sheet Details - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Balance Sheet Related Disclosures [Abstract]
Depreciation expense	$ 3,500	$ 3,200	$ 6,781	$ 6,245

Balance Sheet Details - Accrued

Balance Sheet Details - Accrued Liabilities (Detail) - USD ($) $ in Thousands	Oct. 02, 2016	Apr. 03, 2016
Accrued Liabilities [Line Items]
Payroll-related expenses	$ 8,569	$ 8,030
Bonuses	3,686	5,040
Contingent consideration, current portion	1,909	1,909
Deferred revenue, current	1,618	1,949
Legal fees	694	197
Income tax payable	1,150	553
Other tax payable	768	768
Customer deposits	2,582	4,008
Other accrued liabilities	8,831	6,481
Total accrued liabilities	31,123	30,248
Convertible Senior Notes [Member]
Accrued Liabilities [Line Items]
Accrued contractual coupon interest payable on convertible senior notes	$ 1,316	$ 1,313

Balance Sheet Details - Other L

Balance Sheet Details - Other Long-term Liabilities (Detail) - USD ($) $ in Thousands	Oct. 02, 2016	Apr. 03, 2016
Other Liabilities Disclosure [Abstract]
Long-term tax payable	$ 14,943	$ 13,928
Deferred rent	3,001	3,436
Deferred tax liabilities	2,554	3,026
Deferred revenue	3,700	4,100
Long-term debt	2,412	2,465
Other long-term liabilities	93	275
Total other long-term liabilities	$ 26,703	$ 27,230

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Jun. 28, 2015	Oct. 02, 2016	Sep. 27, 2015
Commitments and Contingencies Disclosure [Abstract]
Non-cancelable operating leases terms				The Company has non-cancelable operating leases for its facilities through fiscal year 2022.
Operating leases, expiration date				2,022
Rental expense, net of rent income from subleases	$ 1,200	$ 1,200		$ 2,300	$ 2,600
Rental income from subleases	400	$ 400		800	700
Future minimum payments under purchase commitments	$ 21,800			21,800
Upfront payment				$ 11,500
Pre-tax charge			$ 11,700		$ 11,708

Commitments and Contingencies41

Commitments and Contingencies - Future Minimum Lease Payments, Net of Future Minimum Lease Income under Operating Leases (Detail) $ in Thousands	Oct. 02, 2016USD ($)
Leases [Abstract]
2017(remainder)	$ 2,949
2,018	6,524
2,019	6,691
2,020	5,339
2,021	1,406
Beyond	514
Total	$ 23,423

Convertible Senior Notes - Addi

Convertible Senior Notes - Additional Information (Detail) $ / shares in Units, shares in Millions	Nov. 30, 2013USD ($)	Nov. 07, 2013USD ($)$ / sharesshares	Oct. 02, 2016USD ($)d$ / shares	Apr. 03, 2016USD ($)$ / shares
Debt Instrument [Line Items]
Convertible senior notes, issuance date			2013-11	2013-11
Convertible senior notes, principal amount			$ 175,000,000	$ 175,000,000
Net proceeds after issuance costs	$ 169,300,000
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 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.
Convertible senior notes, conversion date			Aug. 1, 2018
Convertible senior notes, conversion price | $ / shares			$ 21.89	$ 21.89
Convertible senior notes, face amount per note			$ 1,000	$ 1,000
Convertible senior notes, conversion ratio			45.683	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			2 years 1 month 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%
Significant Other Observable Inputs Level 2 [Member]
Debt Instrument [Line Items]
Fair value of convertible notes			$ 169,600,000
Convertible Notes Hedges Purchased [Member]
Debt Instrument [Line Items]
Convertible senior notes, conversion ratio		0.045683
Call options | shares		8
Common stock at exercise price | $ / shares		$ 21.89
Aggregate price for convertible note hedge		$ 39,100,000
Other Noncurrent Assets [Member]
Debt Instrument [Line Items]
Convertible senior notes, issuance cost			$ 250,000
Call Options [Member]
Debt Instrument [Line Items]
Call options | shares		8
Common stock at exercise price | $ / shares		$ 28.66
Proceeds from sale of warrants		$ 25,600,000
Condition One [Member]
Debt Instrument [Line Items]
Threshold trading days | d			20
Threshold consecutive trading days			30 days
Threshold percentage of conversion price			130.00%
Convertible senior notes, conversion price | $ / shares			$ 21.89
Second Condition [Member]
Debt Instrument [Line Items]
Threshold trading days | d			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 Due 2018 [Member]
Debt Instrument [Line Items]
Convertible senior notes, principal amount	$ 175,000,000
Convertible senior notes, maturity date			Nov. 1, 2018	Nov. 1, 2018
Convertible senior notes, Stated interest rate	1.75%		1.75%
Convertible senior notes, interest payment terms			The Notes pay interest in cash semi-annually (May and November) at a rate of 1.75% per annum.
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
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%

Convertible Senior Notes - Summ

Convertible Senior Notes - Summary of Principal Amounts and Related Unamortized Discount on Notes (Detail) - USD ($) $ in Thousands	Oct. 02, 2016	Apr. 03, 2016
Debt Disclosure [Abstract]
Principal amount of the Notes	$ 175,000	$ 175,000
Unamortized discount on the Notes	19,565	23,809
Unamortized debt issuance costs	125	153
Net carrying value	$ 155,310	$ 151,038

Convertible Senior Notes - Sche

Convertible Senior Notes - Schedule of Interest Expense Recognized Related to Notes (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Debt Disclosure [Abstract]
Contractual coupon interest expense	$ 764	$ 764	$ 1,528	$ 1,528
Accretion of debt discount	2,144	1,986	4,243	3,931
Amortization of debt issuance costs	14	13	28	26
Total interest expense related to the Notes	$ 2,922	$ 2,763	$ 5,799	$ 5,485

Convertible Senior Notes - Sc45

Convertible Senior Notes - Schedule of Aggregate Future Principal Debt Maturities (Detail) - USD ($) $ in Thousands	Oct. 02, 2016	Apr. 03, 2016
Debt Disclosure [Abstract]
2,019	$ 175,000
Total	$ 175,000	$ 175,000

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($)	Sep. 09, 2015	Jul. 31, 2011	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015	Apr. 03, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
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			$ 9,000	$ 400,000	$ 32,000	$ 2,600,000
Unamortized stock-based compensation expense, reduced for estimated forfeitures and related to non-vested options			$ 17,400,000		$ 17,400,000
Weighted average grant date fair value of stock options granted per share			$ 3.60	$ 5.33	$ 2.72	$ 6.06
Shares reserved for issuance to employees			38,168,000		38,168,000		33,388,000
Compensation expense recognized			$ 9,045,000	$ 9,048,000	$ 17,221,000	$ 17,683,000
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Company's common stock for owners, more than					10.00%
2013 Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase and decrease of common stock	1,000,000				2,000,000
Maximum employee subscription percentage			10.00%		10.00%
Employee Stock Purchase Plan description					The purchase price of stock under the ESPP 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 ESPP). Each offering period consists of one purchase period of approximately six months duration.
Purchase price of stock under the Employee Stock Purchase Plan					85.00%
Shares purchased					722,000
Shares reserved for issuance to employees	3,400,000
Compensation expense recognized			$ 300,000	$ 200,000	$ 500,000	$ 500,000
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		3,700,000
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			3 years 3 months 18 days
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 7 months 6 days
Total unamortized compensation expense			$ 38,100,000		$ 38,100,000
Weighted-average grant-date fair value per share			$ 7.46	$ 11.77	$ 6.54	$ 14.20

Stockholders' Equity - Stock Op

Stockholders' Equity - Stock Option Activities (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
	Oct. 02, 2016	Apr. 03, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Options issued and outstanding, Beginning Balance	10,126
Options issued and outstanding, Options granted	2,860
Options issued and outstanding, Options exercised	(33)
Options issued and outstanding, Options canceled	(981)
Options issued and outstanding, Ending Balance	11,972	10,126
Options issued and outstanding, Vested and expected to vest	10,636
Options issued and outstanding, Exercisable	5,462
Weighted-average exercise price, Beginning Balance	$ 12.76
Weighted-average exercise price, Options granted	5.95
Weighted-average exercise price, Options exercised	6.40
Weighted-average exercise price, Options canceled	14.98
Weighted-average exercise price, Ending Balance	10.97	$ 12.76
Weighted-average exercise price, Vested and expected to vest	11.22
Weighted-average exercise price, Exercisable	$ 11.83
Weighted-average remaining contractual term (in years), Balance	7 years 8 months 1 day	7 years 6 months 11 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 3 months
Aggregate Intrinsic Value, Beginning Balance	$ 5,016
Aggregate intrinsic value, Ending Balance	6,622	$ 5,016
Aggregate intrinsic value, Vested and expected to vest	5,461
Aggregate intrinsic value, Exercisable	$ 2,349

Stockholders' Equity - Weighted

Stockholders' Equity - Weighted-Average Assumptions in Determining Stock-Based Compensation Expense Options Granted (Detail) - Employee Stock Options [Member]	3 Months Ended		6 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Expected term (in years)	5 years 6 months	5 years 1 month 6 days	5 years 6 months	5 years 1 month 6 days
Volatility	51.20%	44.40%	49.20%	45.10%
Risk-free interest rate	1.20%	1.50%	1.40%	1.50%
Dividend rate	0.00%	0.00%	0.00%	0.00%

Stockholders' Equity - Restrict

Stockholders' Equity - Restricted Stock Unit and Restricted Stock Activity (Detail) - Restricted Stock Units and Restricted Stock [Member] - $ / shares shares in Thousands	3 Months Ended		6 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Unvested, Beginning period			4,972
Shares, Granted			1,320
Shares, Released			(604)
Shares, Forfeited			(446)
Shares Unvested, Ending period	5,242		5,242
Weighted average grant date fair value per share, Unvested Beginning period			$ 13.47
Weighted average grant date fair value per share, Granted	$ 7.46	$ 11.77	6.54	$ 14.20
Weighted average grant date fair value per share, Released			15.76
Weighted average grant date fair value per share, Forfeited			14.02
Weighted average grant date fair value per share, Unvested Ending period	$ 11.41		$ 11.41

Stockholders' Equity - Common S

Stockholders' Equity - Common Stock Reserved for Future Issuance (Detail) - shares shares in Thousands	Oct. 02, 2016	Apr. 03, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future issuance	27,495	24,393
ESPP	2,678	1,000
Shares issuable upon exercise of warrants to purchase common stock	7,995	7,995
Total common stock reserved for future issuance	38,168	33,388
Employee Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future issuance	11,972	10,126
Restricted Stock Units and Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future issuance	5,242	4,972
Reserved for Future Equity Incentive Grants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future issuance	10,281	9,295

Stockholders' Equity - Summary

Stockholders' Equity - Summary of Total Stock-Based Compensation Costs (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	$ 9,045	$ 9,048	$ 17,221	$ 17,683
Costs of Revenue [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	571	584	1,187	1,184
Research and Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	4,217	4,002	8,291	7,838
Selling, General and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	$ 4,257	$ 4,462	$ 7,743	$ 8,661

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Income Tax Disclosure [Abstract]
Income tax provision (benefit)	$ 242	$ (1,960)	$ 2,114	$ (1,732)
Unrecognized tax benefits	34,200		34,200
Tax benefit if gross unrecognized tax benefits were realized in a subsequent period	$ 18,500		$ 18,500

Acquisition - Additional Inform

Acquisition - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended
	Aug. 31, 2016	Dec. 31, 2015	Oct. 02, 2016	Apr. 03, 2016
Business Acquisition [Line Items]
Goodwill			$ 143,320	$ 139,175
Cash consideration		$ 7,000
Contingent consideration		$ 1,000
Sensirion Holding [Member]
Business Acquisition [Line Items]
Preliminary purchase price	$ 9,800
Goodwill	4,100
Sensirion Holding [Member] | Developed Technology [Member]
Business Acquisition [Line Items]
Intangible assets	$ 5,700
Estimated useful life	6 years

Goodwill and Intangible Asset54

Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015	Apr. 03, 2016
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 143,320		$ 143,320		$ 139,175
Intangible assets, net	60,260		60,260		52,990
Amortization for acquired intangible assets	2,500	$ 2,400	4,882	$ 4,503
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net	56,580		56,580		49,310
Developed Technology [Member] | Product One [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net	$ 1,600		$ 1,600		$ 3,300
Estimated useful life			5 years		5 years
Developed Technology [Member] | Product Two [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net					$ 1,700
Estimated useful life					5 years

Goodwill and Intangible Asset55

Goodwill and Intangible Assets - Summary of Intangible Assets and Accumulated Amortization (Detail) - USD ($) $ in Thousands	Oct. 02, 2016	Apr. 03, 2016
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, Gross	$ 60,260	$ 52,990
Intangible assets, Gross	67,010	61,310
Intangible assets subject to amortization, Accumulated Amortization	23,022	18,141
Intangible assets subject to amortization, Net	37,238	34,849
Intangible assets, Net	43,988	43,169
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, Gross	56,580	49,310
Intangible assets subject to amortization, Accumulated Amortization	21,746	17,159
Intangible assets subject to amortization, Net	34,834	32,151
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, Gross	1,560	1,560
Intangible assets subject to amortization, Accumulated Amortization	650	539
Intangible assets subject to amortization, Net	910	1,021
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, Gross	2,120	2,120
Intangible assets subject to amortization, Accumulated Amortization	626	443
Intangible assets subject to amortization, Net	1,494	1,677
IPR&D [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	6,750	8,320
Intangible assets, Net	$ 6,750	$ 8,320

Goodwill and Intangible Asset56

Goodwill and Intangible Assets - Estimated Future Amortization Expense Related to Intangible Assets (Detail) - USD ($) $ in Thousands	Oct. 02, 2016	Apr. 03, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
2017 (remainder)	$ 5,382
2,018	10,764
2,019	10,764
2,020	6,820
2,021	2,057
Thereafer	1,451
Intangible assets subject to amortization, Net	$ 37,238	$ 34,849