Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Revenue	$ 34,135	$ 37,796	$ 69,338	$ 72,466
Cost of revenue	24,154	25,643	49,704	50,010
Gross profit	9,981	12,153	19,634	22,456
Operating expenses:
Selling, general and administrative	8,223	10,142	18,321	21,099
Research and development	5,461	5,930	11,068	13,848
Restructuring and exit costs	109	2,340	297	2,340
Total operating expenses	13,793	18,412	29,686	37,287
Loss from operations	(3,812)	(6,259)	(10,052)	(14,831)
Gain on sale of product line	(6,657)	0	(6,657)	0
Interest expense, net	61	77	131	171
Other income	(47)	0	(131)	0
Foreign currency exchange loss, net	64	85	203	413
Income (loss) before income taxes	2,767	(6,421)	(3,598)	(15,415)
Income tax provision	600	2,955	1,083	3,302
Net income (loss)	$ 2,167	$ (9,376)	$ (4,681)	$ (18,717)
Net income (loss) per share
Basic and diluted (in dollars per share)	$ 0.07	$ (0.31)	$ (0.15)	$ (0.63)
Weighted average common shares outstanding:
Basic (in shares)	31,842	30,323	31,746	29,886
Diluted (in shares)	32,027	30,323	31,746	29,886