Consolidated Statements of Stockholders' Equity - 9 months ended Sep. 30, 2015 - USD ($) $ in Thousands	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
Balance at Dec. 31, 2014	$ 121,789	$ 63		$ 257,642	$ (135,916)
Balance, Shares at Dec. 31, 2014		63,183,000
Stock-based compensation	2,388			2,388
Issuance of common stock, net of issuance costs	58,295	$ 21		58,274
Issuance of common stock, net of issuance costs, Shares		20,756,000
Issuance of common stock, acquisition	43,677	$ 15		43,662
Issuance of common stock, acquisition, Shares		15,543,000
Exercise of stock options and restricted stock	252	$ 1		251
Exercise of stock options and restricted stock, Shares		622,000
Return of common stock to pay withholding taxes on restricted stock	(3)		$ (3)
Return of common stock to pay withholding taxes on restricted stock, Shares		(1,000)	1,000
Issuance of warrants	96			96
Other comprehensive loss	(429)					$ (429)
Net loss	(33,369)				(33,369)
Balance at Sep. 30, 2015	$ 192,696	$ 100	$ (3)	$ 362,313	$ (169,285)	$ (429)
Balance, Shares at Sep. 30, 2015		100,103,000	1,000