Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Revenue	$ 79,954	$ 63,812
Cost of revenue	52,212	40,018
Gross profit	27,742	23,794
Expenses:
Selling, general and administrative	22,581	19,577
Depreciation and amortization	2,445	1,902
Research and development	3,141	1,947
Loss on disposal of long-lived assets	198	0
Total expenses	28,365	23,426
(Loss) income from operations	(623)	368
Other (expense) income:
Interest expense	(594)	(408)
Other (expense) income, net	154	(6)
Total other expense	(440)	(414)
Loss before income taxes	(1,063)	(46)
Income tax benefit	320	17
Loss from continuing operations	(743)	(29)
Loss from discontinued operations, net of tax	(11,235)	(30,156)
Loss from continuing operations	$ (11,978)	$ (30,185)
Basic earnings (loss) per common share:
Continuing operations (in dollars per share)	$ (0.01)	$ 0.00
Discontinued operations, net of tax (in dollars per share)	(0.19)	(0.55)
Basic earnings (loss) per common share (in dollars per share)	(0.20)	(0.55)
Diluted earnings (loss) per common share:
Continuing operations (in dollars per share)	(0.01)	0.00
Discontinued operations, net of tax (in dollars per share)	(0.19)	(0.55)
Diluted earnings (loss) per common share (in dollars per share)	$ (0.20)	$ (0.55)
Weighted average common shares:
Weighted average common shares used in computing basic earnings (loss) per common share (in shares)	57,673	54,744
Weighted average common shares used in computing diluted earnings (loss) per common share (in shares)	57,673	54,744