Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 30, 2011	Dec. 24, 2010	Dec. 30, 2011	Dec. 24, 2010
Revenue:
Product	$ 7,094	$ 10,553	$ 27,744	$ 37,281
Service and other	4,112	3,368	11,203	10,351
Total revenue	11,206	13,921	38,947	47,632
Costs of revenue:
Cost of product	5,233	6,163	18,845	19,090
Cost of service and other	2,043	2,699	6,251	8,828
Total cost of revenue	7,276	8,862	25,096	27,918
Gross margin	3,930	5,059	13,851	19,714
Operating expenses:
Sales and marketing	4,736	5,320	14,408	15,076
Research and development	4,640	4,803	14,597	14,457
General and administrative	2,305	2,237	7,426	8,149
Restructure and other costs	0	297	0	297
Total operating expenses	11,681	12,657	36,431	37,979
Loss from operations	(7,751)	(7,598)	(22,580)	(18,265)
Interest income	74	298	277	731
Interest expense	(552)	(554)	(1,658)	(1,661)
Other income (expense), net	(78)	65	(82)	7
Loss before taxes	(8,307)	(7,789)	(24,043)	(19,188)
Income tax provision	57	33	276	238
Net loss	(8,364)	(7,822)	(24,319)	(19,426)
Basic and diluted net loss per share (in dollars per share)	$ (0.27)	$ (0.26)	$ (0.80)	$ (0.65)
Common and common equivalent shares, basic and diluted (in shares)	30,483	29,848	30,374	29,814
Condensed Consolidated Statements of Comprehensive Loss:
Net loss	(8,364)	(7,822)	(24,319)	(19,426)
Other comprehensive loss:
Foreign currency translation adjustments	31	(23)	(152)	(284)
Gross unrealized holding gains (losses) on available-for-sale securities	(4)	(168)	(67)	(71)
Less: Reclassification adjustments for gains included in net loss	6	(57)	(61)	(147)
Comprehensive loss	$ (8,331)	$ (8,070)	$ (24,599)	$ (19,928)