Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited) - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Jan. 01, 2017	Dec. 27, 2015	Jan. 01, 2017	Dec. 27, 2015
Sales:
Net sales	$ 18,845,000	$ 16,884,000	$ 58,881,000	$ 47,740,000
Net sales, related party	8,377,000	8,426,000	23,078,000	28,508,000
Total net sales	27,222,000	25,310,000	81,959,000	76,248,000
Cost of sales:
Cost of sales	10,054,000	9,716,000	31,473,000	29,922,000
Cost of sales, related party	3,118,000	4,025,000	8,468,000	12,847,000
Restructuring charges and exit costs	0	2,600,000	1,100,000	5,600,000
Proceeds from legal settlement				(1,500,000)
Amortization of purchased intangible assets	594,000	594,000	1,782,000	1,833,000
Total cost of sales	13,766,000	14,335,000	41,948,000	43,842,000
Gross profit	13,456,000	10,975,000	40,011,000	32,406,000
Operating expenses:
Research and development	4,964,000	4,734,000	14,840,000	17,007,000
Selling, general and administrative	9,109,000	6,781,000	23,425,000	21,690,000
Merger and acquisition costs			1,270,000	544,000
Restructuring charges and exit costs, net	0	2,600,000	1,100,000	5,600,000
Impairment of design tools	0		1,519,000
Gain on sale of land and building under sale-leaseback arrangement			(9,300,000)
Total operating expenses, net	14,073,000	14,154,000	32,677,000	44,087,000
Income (loss) from operations	(617,000)	(3,179,000)	7,334,000	(11,681,000)
Other income and (expense), net:
Interest income and other, net	212,000	(12,000)	299,000	(60,000)
Interest expense	(80,000)	(65,000)	(147,000)	(158,000)
Total other income (expense), net	132,000	(77,000)	152,000	(218,000)
Income (loss) before income taxes	(485,000)	(3,256,000)	7,486,000	(11,899,000)
Provision for (benefit from) income taxes	(204,000)	(1,211,000)	141,000	(5,410,000)
Net income (loss) from continuing operations	(281,000)	(2,045,000)	7,345,000	(6,489,000)
Net income (loss) from discontinued operations (See Note 3)	45,660,000	(5,092,000)	47,982,000	(7,355,000)
Net income (loss)	$ 45,379,000	$ (7,137,000)	$ 55,327,000	$ (13,844,000)
Net income (loss) per share from continuing operations:
Basic (in dollars per share)	$ (0.01)	$ (0.04)	$ 0.15	$ (0.13)
Diluted (in dollars per share)	(0.01)	(0.04)	0.15	(0.13)
Net income (loss) per share from discontinued operations:
Basic (in dollars per share)	0.91	(0.11)	0.97	(0.15)
Diluted (in dollars per share)	0.89	(0.11)	0.95	(0.15)
Net income (loss) per share:
Basic (in dollars per share)	0.90	(0.15)	1.12	(0.28)
Diluted (in dollars per share)	$ 0.88	$ (0.15)	$ 1.10	$ (0.28)
Basic (in shares)	50,409	48,386	49,548	48,146
Effect of options and awards (in shares)	956		713
Diluted (in shares)	51,365	48,386	50,261	48,146
Continuing Operations [Member]
Net income (loss) per share:
Basic (in shares)	50,409	48,386	49,548	48,146
Effect of options and awards (in shares)			713
Diluted (in shares)	50,409	48,386	50,261	48,146
Discontinued Operations [Member]
Net income (loss) per share:
Basic (in shares)	50,409	48,386	49,548	48,146
Effect of options and awards (in shares)	956		713
Diluted (in shares)	51,365	48,386	50,261	48,146
Cost of Sales [Member]
Cost of sales:
Restructuring charges and exit costs			$ 225,000	$ 740,000
Operating expenses:
Restructuring charges and exit costs, net			225,000	740,000
Operating Expense [Member]
Cost of sales:
Restructuring charges and exit costs		2,639,000	923,000	4,846,000
Operating expenses:
Restructuring charges and exit costs, net		$ 2,639,000	$ 923,000	$ 4,846,000