Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - 9 months ended Sep. 30, 2016 - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2015	$ 125,257	$ 6	$ 253,986		$ (128,654)	$ (81)
Balance, shares at Dec. 31, 2015	61,826,000	61,826,000
Common stock received for settlement of taxes and forfeited restricted stock	$ (1,347)			$ (1,347)
Common stock received for settlement of taxes and forfeited restricted stock, shares				(153,000)
Common stock issued for options exercised	3,398		2,791	$ 1,068	(461)
Common stock issued for options exercised, shares		412,000		118,000
Common stock issued under the employee stock purchase plan	$ 826		753	$ 129	(56)
Common stock issued under the employee stock purchase plan, shares	96,000	96,000		9,000
Issuance of common stock for acquisition of a business	$ 344		344
Issuance of common stock for acquisition of a business, shares		64,000
Stock-based compensation	6,870		6,870
Vesting of restricted stock units			(122)	$ 144	(22)
Vesting of restricted stock units, shares		214,000		26,000
Other comprehensive income	80					80
Net loss	(16,509)				(16,509)
Balance at Sep. 30, 2016	$ 118,919	$ 6	$ 264,622	$ (6)	$ (145,702)	$ (1)
Balance, shares at Sep. 30, 2016	62,612,000	62,612,000