Condensed Consolidated Statements of Operations (Unaudited) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Jun. 30, 2013	Jul. 01, 2012
Sales:
Net sales	$ 23,858,000	$ 19,447,000
Net sales, related party	8,769,000	9,804,000
Total net sales	32,627,000	29,251,000
Cost of sales:
Cost of sales	11,812,000	10,870,000
Cost of sales, related party	3,907,000	4,512,000
Amortization of purchased intangible assets	1,350,000	919,000
Restructuring charges and exit costs	1,000,000	900,000
Gross profit	15,477,000	12,869,000
Operating expenses:
Research and development	6,198,000	5,449,000
Selling, general and administrative	7,801,000	7,782,000
Income (loss) from operations	547,000	(1,166,000)
Other income and expense, net:
Interest income and other, net	287,000	646,000
Interest expense	(37,000)	(34,000)
Total other income and expense, net	250,000	612,000
Income (loss) before income taxes	797,000	(554,000)
Provision for (benefit from) income taxes	(9,000)	22,000
Net income (loss)	806,000	(576,000)
Net income (loss) per share:
Basic (in Dollars per share)	$ 0.02	$ (0.01)
Diluted (in Dollars per share)	$ 0.02	$ (0.01)
Shares used in the computation of net income (loss) per share:
Basic (in Shares)	46,805	45,388
Diluted (in Shares)	48,085	45,388
Cost of Sales [Member]
Cost of sales:
Restructuring charges and exit costs	81,000	81,000
Total cost of sales	17,150,000	16,382,000
Operating Expense [Member]
Cost of sales:
Restructuring charges and exit costs	931,000	804,000
Total operating expenses	$ 14,930,000	$ 14,035,000