Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended									12 Months Ended
	Mar. 28, 2015	Dec. 27, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Dec. 29, 2012	Mar. 28, 2015	Mar. 29, 2014	Mar. 30, 2013
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 37,571	$ 43,661	$ 42,856	$ 35,030	$ 37,081	$ 38,267	$ 59,647	$ 46,172		$ 159,118	$ 181,167	$ 216,625
Cost of Goods Sold	18,488	22,031	20,742	16,934	29,598	17,249	31,398	22,625		78,195	100,870	133,141
Cost of Services	6,168	6,917	7,349	5,808	4,854	5,817	4,667	5,088		26,242	20,426	22,196
Cost of Goods and Services Sold	24,656	28,948	28,091	22,742	34,452	23,066	36,065	27,713		104,437	121,296	155,337
Sales Revenue, Goods, Net	26,156	31,750	30,273	23,424	26,549	27,704	49,751	38,050		111,603	142,054	183,531
Sales Revenue, Services, Net	11,415	11,911	12,583	11,606	10,532	10,563	9,896	8,122		47,515	39,113	33,094
Gross profit	12,915	14,713	14,765	12,288	2,629	15,201	23,582	18,459		54,681	59,871	61,288
Net operating expenses	24,197	20,716	20,323	21,298	24,446	19,795	22,885	21,581		94,425	88,707	76,406
Provision for (benefit from) income taxes	69	437	441	(713)	(301)	141	(33)	101		234	(92)	39,851
Net income (loss)	$ (22,941)	$ (6,376)	$ (6,243)	$ (8,251)	$ (27,633)	$ (4,640)	$ (2,778)	$ (3,283)		$ (43,811)	$ (38,334)	$ (54,716)
Basic net (loss) income per share	$ (0.75)	$ (0.21)	$ (0.20)	$ (0.27)	$ (0.92)	$ (0.15)	$ (0.09)	$ (0.11)		$ (1.43)	$ (1.28)	$ (1.86)
Diluted net (loss) income per share	(0.75)	(0.21)	(0.20)	(0.27)	(0.92)	(0.15)	(0.09)	(0.11)		(1.43)	(1.28)	(1.86)
Dividends per outstanding common share - declared	0	0.08	0.08	0.08	0.08	0.08	0.08	0.08
Cash dividends paid per common share	$ 0	$ 0.08	$ 0.08	$ 0.08	$ 0.08	$ 0.08	$ 0.08	$ 0.08		$ 0.24	$ 0.32	$ 2.32
Other information
Inventory write-off	$ 1,000				$ 12,800					$ 1,000	$ 12,800
Restructuring costs	2,000				1,100					2,069	1,070	$ 2,612
Business Combination, Acquisition Related Costs	500	$ 300
Goodwill, Impairment Loss										7,889	0	0
Loss on cost method investments	$ 4,300
Gain on liquidation of foreign subsidiary										600
Loss on disposal of assets					1,000				$ 1,300	0	1,301	1,226
Other than temporary impairment of cost based investments					$ (6,100)		$ (3,600)			$ 4,263	$ 9,703	$ 0