Consolidated Statements of Operations (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Mar. 30, 2014	Mar. 31, 2013	Apr. 01, 2012
Sales:
Net sales	$ 89,595,000	$ 85,856,000	$ 89,988,000
Net sales, related party	35,727,000	36,170,000	40,578,000
Total net sales	125,322,000	122,026,000	130,566,000
Cost of sales:
Cost of sales	48,067,000	45,943,000	49,839,000
Cost of sales, related party	15,738,000	16,716,000	19,888,000
Amortization of purchased intangible assets and inventory step-up cost	7,600,000	3,379,000	3,603,000
Impairment of intangible assets	1,636,000	0	0
Warranty reserve	1,440,000
Restructuring charges and exit costs	3,000,000		14,200,000
Total cost of sales	74,668,000	66,339,000	74,642,000
Gross profit	50,654,000	55,687,000	55,924,000
Operating expenses:
Research and development	27,048,000	22,376,000	35,006,000
Selling, general and administrative	33,055,000	32,531,000	38,598,000
Merger and acquisition costs	1,880,000	110,000
Net change in fair value of contingent consideration	(10,455,000)
Total operating expenses, net	54,355,000	56,270,000	86,517,000
Loss from operations	(3,701,000)	(583,000)	(30,593,000)
Other income and expense, net:
Interest income and other, net	1,503,000	2,441,000	2,803,000
Interest expense	(156,000)	(165,000)	(215,000)
Impairment of long term investment	(323,000)
Total other income and expense, net	1,024,000	2,276,000	2,588,000
Income (loss) before income taxes	(2,677,000)	1,693,000	(28,005,000)
Provision for (benefit from) income taxes	(8,478,000)	(1,189,000)	51,000
Net income (loss)	5,801,000	2,882,000	(28,056,000)
Net income (loss) per share:
Basic (in Dollars per share)	$ 0.12	$ 0.06	$ (0.63)
Diluted (in Dollars per share)	$ 0.12	$ 0.06	$ (0.63)
Shares used in the computation of net income (loss) per share:
Basic (in Shares)	47,291	45,809	44,796
Diluted (in Shares)	48,823	46,476	44,796
Cost of Sales [Member]
Cost of sales:
Restructuring charges and exit costs	187,000	301,000	1,312,000
Operating Expense [Member]
Cost of sales:
Restructuring charges and exit costs	$ 2,827,000	$ 1,253,000	$ 12,913,000