Consolidated Statements of Stockholders' (Deficit) Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Treasury Stock [Member]	Paid in Capital [Member]	Accumulated Deficit [Member]
Beginning balance at Dec. 31, 2012	$ 149,434	$ 540	$ (11,740)	$ 349,666	$ (189,032)
Beginning balance, shares at Dec. 31, 2012		18,244,000
Treasury stock, Beginning balance, shares at Dec. 31, 2012			(457,000)
Stock issuance	88,040	$ 155		87,885
Stock issuance, shares		5,175,000
Net (loss) income	5,753				5,753
Purchase of treasury stock	(174)		$ (174)
Purchase of treasury stock, shares			(11,000)
Stock options exercised	125			125
Stock options exercised, shares		15,000
Stock-based compensation	2,530	$ 3		2,527
Stock-based compensation, shares		94,000
Stock options exercised	103			103
Ending balance at Dec. 31, 2013	245,811	$ 698	$ (11,914)	440,306	(183,279)
Ending balance, shares at Dec. 31, 2013		23,528,000
Treasury stock, Ending balance, shares at Dec. 31, 2013			(468,000)
Stock issuance	55	$ 0		55
Stock issuance, shares		2,000
Stock issued through stock purchase plans, shares		0
Balance at December 31, 2014	47,274	$ 42		47,232
Shares issued for acquisition, shares		1,382,000
Net (loss) income	(8,942)				(8,942)
Purchase of treasury stock	(1,651)		$ (1,651)
Purchase of treasury stock, shares			(47,000)
Stock options exercised	18			18
Stock options exercised, shares		3,000
Stock-based compensation	4,909	$ 4		4,905
Stock-based compensation, shares		20,000
Stock options exercised	1,071			1,071
Ending balance at Dec. 31, 2014	$ 288,545	$ 744	$ (13,565)	493,587	(192,221)
Ending balance, shares at Dec. 31, 2014		24,935,000
Treasury stock, Ending balance, shares at Dec. 31, 2014	(515,071)		(515,000)
Stock issued through stock purchase plans	$ 136			136
Stock issued through stock purchase plans, shares		6,000
Net (loss) income	(448)				(448)
Purchase of treasury stock	(7,724)		$ (7,724)
Purchase of treasury stock, shares			(297,000)
Stock options exercised	1,111	$ 2		1,109
Stock options exercised, shares		76,000
Stock-based compensation	6,341	$ 8		6,333
Stock-based compensation, shares		393,000
Stock options exercised	1,810			1,810
Ending balance at Dec. 31, 2015	$ 289,771	$ 754	$ (21,289)	$ 502,975	$ (192,669)
Ending balance, shares at Dec. 31, 2015		25,410,000
Treasury stock, Ending balance, shares at Dec. 31, 2015	(810,838)		(812,000)