Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Condensed Consolidated Statements Of Operations [Abstract]
Revenues	$ 8,726	$ 11,558	$ 24,756	$ 35,841
Cost of revenues	4,720	6,477	13,737	19,996
Gross margin	4,006	5,081	11,019	15,845
Research and development expenses	1,978	2,129	5,835	6,108
Selling, general and administrative expenses	2,989	3,324	9,340	9,919
Restructuring and severance costs		217		217
Loss from operations	(961)	(589)	(4,156)	(399)
Interest income and other	(107)	94	(184)	53
Loss before income taxes	(1,068)	(495)	(4,340)	(346)
Income tax provision (benefit)	(294)	(48)	(220)	(134)
Net loss	$ (774)	$ (447)	$ (4,120)	$ (212)
Net loss per share - Basic	$ (0.11)	$ (0.06)	$ (0.60)	$ (0.03)
Net loss per share - Diluted	$ (0.11)	$ (0.06)	$ (0.60)	$ (0.03)
Weighted average shares outstanding - Basic	6,784	6,951	6,883	6,940
Weighted average shares outstanding - Diluted	6,784	6,951	6,883	6,940