Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net income (loss)	$ (45,007,000)	$ 5,801,000	$ 2,882,000
Reconciliation of net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	18,424,000	12,947,000	10,809,000
Impairment charges	13,367,000	2,224,000
Stock-based compensation expense	13,614,000	8,852,000	4,788,000
Restructuring charges and exit costs	7,985,000	57,000	56,000
Release of deferred tax valuation allowance	828,000	(6,940,000)
Gain on sale of intangible asset			(223,000)
Net change in fair value of contingent consideration	(4,343,000)	(10,455,000)
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable and accounts receivable, related party	(694,000)	(1,960,000)	(4,616,000)
Inventories	(2,405,000)	(5,907,000)	(930,000)
Other current and non-current assets	(5,766,000)	(305,000)	528,000
Accounts payable	(6,702,000)	5,505,000	1,632,000
Accrued compensation and related benefits	(865,000)	412,000	(513,000)
Other current and non-current liabilities	(1,307,000)	(8,620,000)	(5,903,000)
Deferred income and allowance on sales to distributors and related party distributor	(770,000)	(760,000)	(1,144,000)
Net cash provided by (used in) operating activities	(13,641,000)	851,000	7,366,000
Cash flows from investing activities:
Purchases of property, plant and equipment and intellectual property, net	(3,925,000)	(2,658,000)	(1,385,000)
Purchases of short-term marketable securities	(9,296,000)	(257,946,000)	(200,654,000)
Proceeds from maturities of short-term marketable securities	3,997,000	31,821,000	48,687,000
Proceeds from sales of short-term marketable securities	158,412,000	264,221,000	148,914,000
Other disposal activities		125,000	360,000
Net cash provided by (used in) investing activities	76,530,000	12,786,000	(4,828,000)
Cash flows from financing activities:
Proceeds from issuance of common stock	6,358,000	5,844,000	6,515,000
Purchase of stock for withholding taxes on vested restricted stock	(1,090,000)	(1,149,000)	(219,000)
Proceeds from issuance of debt	91,000,000
Repayment of debt	(91,000,000)
Payment of non-controlling interest of Integrated Memory Logic Limited	(18,883,000)
Capital contribution from Integrated Memory Logic Limited non-controlling interest	740,000
Repurchase of common stock	(7,999,000)	(9,000,000)
Repayment of lease financing obligations	(1,396,000)	(3,249,000)	(2,830,000)
Net cash provided by (used) in financing activities	(22,270,000)	(13,741,000)	3,466,000
Net increase (decrease) in cash and cash equivalents	40,619,000	(104,000)	6,004,000
Cash and cash equivalents at the beginning of year	14,614,000	14,718,000	8,714,000
Cash and cash equivalents at the end of year	55,233,000	14,614,000	14,718,000
Supplemental disclosure of cash flow and non-cash information:
Cash paid for income taxes	42,000	106,000	154,000
Cash paid for interest	1,085,000	155,000	165,000
Non-cash investing and financing activities:
Engineering design tool acquired under capital lease	8,842,000
Release of restricted stock upon vesting	416,000
Integrated Memory Logic Limited [Member]
Cash flows from investing activities:
Acquisition, net of cash acquired	(72,658,000)
Cadeka Microcircuits and Others [Member]
Cash flows from investing activities:
Acquisition, net of cash acquired		(22,777,000)	(750,000)
Stretch, Inc. [Member]
Cash flows from financing activities:
Repayment of debt assumed from Stretch acquisition		(6,187,000)
Altior Acquisition and Others [Member]
Non-cash investing and financing activities:
Issuance of common stock in connection with acquisition		10,000	3,759,000
Cadeka Microcircuits [Member]
Non-cash investing and financing activities:
Issuance of common stock in connection with acquisition		$ 5,005,000