Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Condensed Consolidated Statements Of Operations [Abstract]
Revenue	$ 41,096	$ 31,452	$ 114,818	$ 87,654
Cost of revenue	24,547	19,130	68,909	53,284
Gross profit	16,549	12,322	45,909	34,370
Operating expenses:
Selling, general and administrative	9,544	8,747	29,225	27,086
Research and development	5,707	4,432	16,976	12,968
Amortization of intangibles	51	50	153	182
Total operating expenses	15,302	13,229	46,354	40,236
Income (loss) from operations	1,247	(907)	(445)	(5,866)
Interest expense, net	(27)	(46)	(88)	(144)
Amortization of debt discount and prepaid debt costs		(21)	(55)	(62)
Gain (loss) on embedded derivatives and warrants		(814)	1,086	3,661
Income (loss) from operations before income taxes	1,220	(1,788)	498	(2,411)
Income tax provision	922	562	1,221	1,281
Net income (loss)	$ 298	$ (2,350)	$ (723)	$ (3,692)
Net income (loss) per share:
Basic	$ 0.01	$ (0.09)	$ (0.03)	$ (0.14)
Diluted	$ 0.01	$ (0.09)	$ (0.03)	$ (0.14)
Weighted average common shares outstanding:
Basic	27,733	26,195	27,564	26,149
Diluted	28,161	26,195	27,564	26,149