Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Revenue	$ 72,289	$ 82,373
Cost of revenue	47,360	55,846
Gross profit	24,929	26,527
Expenses:
Selling, general and administrative	25,453	23,568
Depreciation and amortization	2,798	2,676
Research and development	2,256	1,572
Impairment of inventory and long-lived assets	40,435	0
Total expenses	70,942	27,816
Loss from operations	(46,013)	(1,289)
Other expense:
Interest expense, net	(489)	(407)
Other expense, net	(120)	(225)
Total other expense	(609)	(632)
Loss before income taxes	(46,622)	(1,921)
Income tax benefit	16,437	406
Net loss	$ (30,185)	$ (1,515)
Loss per common share:
Basic loss per common share (in dollars per share)	$ (0.55)	$ (0.03)
Diluted loss per common share (in dollars per share)	$ (0.55)	$ (0.03)
Weighted average common shares:
Weighted average common shares used in computing basic loss per common share (in shares)	54,744	54,448
Weighted average common shares used in computing diluted loss per common share (in shares)	54,744	54,448