Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenues:
Product	$ 19,524	$ 16,815	$ 23,825
Service	2,469	1,392	1,760
Total revenues	21,993	18,207	25,585
Cost of sales:
Product	9,907	8,340	11,957
Service	1,555	680	1,339
Total cost of sales	11,462	9,020	13,296
Gross margin	10,531	9,187	12,289
Research and development	3,814	6,572	7,970
Sales and marketing	3,498	4,512	5,753
General and administrative	3,529	3,843	4,275
Restructuring charge		3,339	1,236
Total operating expenses	10,841	18,266	19,234
Loss from operations	(310)	(9,079)	(6,945)
Interest income, net	22	102	301
Other loss, net		(79)	(12)
Loss before income tax	(288)	(9,056)	(6,656)
Income tax provision (benefit)	217	(637)	(1,102)
Net loss	$ (505)	$ (8,419)	$ (5,554)
Net loss per share:
Basic	$ (0.07)	$ (1.23)	$ (0.81)
Diluted	$ (0.07)	$ (1.23)	$ (0.81)
Weighted average common shares	6,857	6,839	6,899
Weighted average common and dilutive shares	6,857	6,839	6,899