Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Jun. 29, 2012	Jun. 24, 2011
Revenue:
Product	$ 7,509	$ 7,699
Service and other	3,907	3,614
Total revenue	11,416	11,313
Costs of revenue:
Cost of product	5,118	5,353
Cost of service and other	1,556	2,112
Total cost of revenue	6,674	7,465
Gross margin	4,742	3,848
Operating expenses:
Sales and marketing	3,501	4,464
Research and development	3,601	4,821
General and administrative	2,972	2,498
Restructure and other costs	121	0
Total operating expenses	10,195	11,783
Loss from operations	(5,453)	(7,935)
Interest income	42	106
Interest expense	(551)	(553)
Other income (expense), net	(5)	34
Loss before taxes	(5,967)	(8,348)
Income tax provision	38	72
Net loss	(6,005)	(8,420)
Basic and diluted net loss per share (in dollars per share)	$ (0.2)	$ (0.28)
Common and common equivalent shares, basic and diluted (in shares)	30,573	30,316
Condensed Consolidated Statements of Comprehensive Loss:
Net loss	(6,005)	(8,420)
Other comprehensive loss:
Foreign currency translation adjustments	91	83
Gross unrealized holding gains (losses) on available-for-sale securities	(22)	80
Less: Reclassification adjustments for (gains) losses included in net loss	5	(36)
Comprehensive loss	$ (5,931)	$ (8,293)