CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY Statement - USD ($) $ in Thousands	Total	Common Stock	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss)
Balance at beginning of year at Mar. 29, 2014	$ 222,881	$ 183,193	$ 39,336	$ 352
Balance at beginning of year (shares) at Mar. 29, 2014		30,155,000
Cash dividends paid	(7,266)		(7,266)
Stock plans:
Employee stock plans (shares)		757,000
Employee stock plans	$ 4,555	$ 4,555
Stock Repurchased During Period, Shares	(208,000)
Stock Repurchased During Period, Value	$ (1,456)
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value	2,842
Comprehensive income (loss):
Net (loss) income	(43,811)		(43,811)
Other Comprehensive Income (Loss), Net of Tax	(424)			(424)
Net unrealized gain on securities, net of tax	(15)
Cumulative translation adjustment, net of tax	(384)
Accumulated other comprehensive loss related to benefit plan obligations, net of tax	(25)
Comprehensive (loss) income	(44,235)
Balance at end of year at Mar. 28, 2015	177,321	$ 189,134	(11,741)	(72)
Balance at end of year (shares) at Mar. 28, 2015		30,704,000
Stock plans:
Employee stock plans (shares)		909,000
Employee stock plans	$ 5,827	$ 5,827
Stock Repurchased During Period, Shares	(207,738)
Stock Repurchased During Period, Value	$ 0
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value	63
Share repurchases	1,500
Comprehensive income (loss):
Net (loss) income	(12,257)
Other Comprehensive Income (Loss), Net of Tax	(923)			(923)
Net unrealized gain on securities, net of tax	3
Cumulative translation adjustment, net of tax	(922)
Accumulated other comprehensive loss related to benefit plan obligations, net of tax	(4)
Comprehensive (loss) income	(13,180)			(923)
Balance at end of year at Apr. 02, 2016	170,031	$ 195,024	(23,998)	(995)
Balance at end of year (shares) at Apr. 02, 2016		31,613,000
Stock plans:
Employee stock plans (shares)		1,647,000
Employee stock plans	7,652	$ 7,652
Stock Repurchased During Period, Value	0
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value	4,476
Comprehensive income (loss):
Net (loss) income	(37,409)
Other Comprehensive Income (Loss), Net of Tax	(219)			(219)
Net unrealized gain on securities, net of tax	(6)
Cumulative translation adjustment, net of tax	(348)
Accumulated other comprehensive loss related to benefit plan obligations, net of tax	135
Comprehensive (loss) income	(37,628)			(219)
Balance at end of year at Apr. 01, 2017	$ 144,531	$ 207,152	$ (61,407)	$ (1,214)
Balance at end of year (shares) at Apr. 01, 2017		33,260,000