Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Condensed Consolidated Statements Of Operations [Abstract]
Revenues	$ 13,003	$ 16,859	$ 24,283	$ 30,209
Cost of revenues	7,474	9,352	13,519	16,095
Gross margin	5,529	7,507	10,764	14,114
Research and development expenses	2,062	1,947	3,979	3,765
Selling, general and administrative expenses	3,369	3,671	6,595	7,328
Amortization of intangibles		45		90
Income from operations	98	1,844	190	2,931
Interest income and other	(76)	(7)	(41)	79
Income before income taxes	22	1,837	149	3,010
Income tax provision (benefit)	(121)	439	(86)	766
Net income	$ 143	$ 1,398	$ 235	$ 2,244
Net income per share - Basic	$ 0.02	$ 0.20	$ 0.03	$ 0.33
Net income per share - Diluted	$ 0.02	$ 0.20	$ 0.03	$ 0.32
Weighted average shares outstanding - Basic	6,935	6,894	6,934	6,893
Weighted average shares outstanding - Diluted	6,994	6,948	6,988	6,941