CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Apr. 02, 2011
Net sales	$ 216,625	$ 254,229	$ 256,811
Cost of sales	152,372	146,538	147,862
Gross profit	64,253	107,691	108,949
Operating expenses:
Selling, service and administration	56,051	58,555	58,262
Research, development and engineering	37,196	42,640	41,095
Restructuring costs	2,612	3,785	797
(Gain) loss on sale of property and equipment, net	(1,226)	966	0
Legal settlement (proceeds) costs, net	(15,262)	550	1,367
Net operating expenses	79,371	106,496	101,521
Operating (loss) income	(15,118)	1,195	7,428
Non-operating (expense) income:
Gain on sale of previously impaired auction rate securities	0	2,729	708
Interest and other (expense) income, net	253	(437)	188
Total non-operating (expense) income	253	2,292	896
Income (loss) before income taxes	(14,865)	3,487	8,324
Provision for (benefit from) income taxes	39,851	(1,417)	390
Net (loss) income	$ (54,716)	$ 4,904	$ 7,934
Net (loss) income per share - basic	$ (1.86)	$ 0.17	$ 0.28
Net (loss) income per share - diluted	$ (1.86)	$ 0.17	$ 0.28
Weighted average number of shares - basic	29,357	28,749	28,045
Weighted average number of shares - diluted	29,357	29,461	28,608
Cash dividends paid per common share	$ 2.32	$ 0.08	$ 0