Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Revenue	$ 45,076	$ 41,593	$ 117,542	$ 133,668
Cost of revenue	30,820	26,113	80,830	83,728
Gross profit	14,256	15,480	36,712	49,940
Operating expenses:
Selling, general and administrative	9,070	10,839	30,169	32,192
Research and development	5,781	6,923	19,629	19,317
Restructuring and exit costs	56	0	2,396	0
Total operating expenses	14,907	17,762	52,194	51,509
Loss from operations	(651)	(2,282)	(15,482)	(1,569)
Interest expense, net	25	49	189	116
Amortization of prepaid debt costs	5	5	12	15
Foreign currency exchange gains and losses, net	(97)	(6)	316	514
Loss from operations before income taxes	(584)	(2,330)	(15,999)	(2,214)
Income tax provision	865	962	4,167	1,940
Net loss	$ (1,449)	$ (3,292)	$ (20,166)	$ (4,154)
Net loss per share:
Basic and diluted (in dollars per share)	$ (0.05)	$ (0.11)	$ (0.66)	$ (0.14)
Weighted average common shares outstanding:
Basic and diluted (in shares)	31,529	29,284	30,440	29,146