Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Statement [Abstract]
Revenue	$ 46,001	$ 47,748
Cost of revenue	28,131	29,518
Gross profit	17,870	18,230
Operating expenses:
Selling, general and administrative	10,939	11,502
Research and development	6,171	6,023
Total operating expenses	17,110	17,525
Income from operations	760	705
Interest expense, net	39	44
Amortization of debt discount and prepaid debt costs	5	15
Income from operations before income taxes	716	646
Income tax provision	397	924
Net income (loss)	$ 319	$ (278)
Net income (loss) per share:
Basic	$ 0.01	$ (0.01)
Diluted	$ 0.01	$ (0.01)
Weighted average common shares outstanding:
Basic	29,047	28,825
Diluted	29,216	28,825