Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Revenue	$ 37,796	$ 46,074	$ 72,466	$ 92,075
Cost of revenue	25,643	29,477	50,010	57,615
Gross profit	12,153	16,597	22,456	34,460
Operating expenses:
Selling, general and administrative	10,142	10,709	21,099	21,353
Research and development	5,930	6,223	13,848	12,394
Restructuring and exit costs	2,340	0	2,340	0
Total operating expenses	18,412	16,932	37,287	33,747
Income (loss) from operations	(6,259)	(335)	(14,831)	713
Interest expense, net	75	28	164	67
Amortization of prepaid debt costs	2	5	7	10
Foreign currency exchange losses, net	85	232	413	520
Income (loss) from operations before income taxes	(6,421)	(600)	(15,415)	116
Income tax provision	2,955	581	3,302	978
Net loss	$ (9,376)	$ (1,181)	$ (18,717)	$ (862)
Net loss per share:
Basic and diluted (in dollars per share)	$ (0.31)	$ (0.04)	$ (0.63)	$ (0.03)
Weighted average common shares outstanding:
Basic and diluted (in shares)	30,323	29,206	29,886	29,127