Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Revenue	$ 25,506	$ 45,076	$ 94,844	$ 117,542
Cost of revenue	17,878	30,820	67,582	80,830
Gross profit	7,628	14,256	27,262	36,712
Operating expenses:
Selling, general and administrative	8,374	9,070	26,695	30,169
Research and development	5,193	5,781	16,261	19,629
Restructuring and exit costs	0	56	297	2,396
Total operating expenses	13,567	14,907	43,253	52,194
Loss from operations	(5,939)	(651)	(15,991)	(15,482)
Gain on sale of product line	0	0	(6,657)	0
Interest expense, net	48	30	179	201
Other income	(5)	0	(136)	0
Foreign currency exchange (gain) loss, net	49	(97)	252	316
Loss before income taxes	(6,031)	(584)	(9,629)	(15,999)
Income tax provision	824	865	1,907	4,167
Net loss	$ (6,855)	$ (1,449)	$ (11,536)	$ (20,166)
Net loss per share
Basic and diluted (in dollars per share)	$ (0.21)	$ (0.05)	$ (0.36)	$ (0.66)
Weighted average common shares outstanding:
Basic and diluted (in shares)	31,989	31,529	31,828	30,440