CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional Paid-In Capital	Accumulated other comprehensive gain [Member]	Accumulated Deficit	Total
Beginning balance, shares at Dec. 31, 2013	12,644
Beginning balance, value at Dec. 31, 2013	$ 13	$ 144,023	$ 2,364	$ (83,323)	$ 63,077
Issuance of common stock, net shares	2,025
Public offering of common stock, net, value	$ (2)	(45,679)			(45,681)
Stock Issued During Period, Shares, Share-based Compensation, Gross	33
Stock options exercised, shares	103
Stock options exercised, value		365			365
Warrants exercised, shares issued	19
Stock based compensation		2,045			2,045
Net income				4,283	4,283
Loss on foreign currency translation adjustment			(439)		(439)
Ending balance, shares at Dec. 31, 2014	14,824
Ending balance, value at Dec. 31, 2014	$ 15	192,112	1,925	(79,040)	115,012
Issuance of common stock, net shares	1,857
Public offering of common stock, net, value	$ (2)	(38,646)			(38,648)
Stock Issued During Period, Shares, Share-based Compensation, Gross	77
Stock options exercised, shares	81
Stock options exercised, value		452			452
Stock based compensation		2,120			2,120
Net income				10,793	10,793
Loss on foreign currency translation adjustment			(1,633)		(1,633)
Adjustments to Additional Paid in Capital, Other		6			6
Ending balance, shares at Dec. 31, 2015	16,839
Ending balance, value at Dec. 31, 2015	$ 17	233,336	292	(68,247)	165,398
Issuance of common stock, net shares	1,126
Public offering of common stock, net, value	$ (1)	(27,236)			(27,237)
Stock Issued During Period, Shares, Share-based Compensation, Gross	276
Stock options exercised, shares	159
Stock options exercised, value		859			859
Stock based compensation		3,833			3,833
Net income				31,234	31,234
Loss on foreign currency translation adjustment			(1,177)		(1,177)
Ending balance, shares at Dec. 31, 2016	18,400
Ending balance, value at Dec. 31, 2016	$ 18	$ 265,264	$ (885)	$ (37,013)	$ 227,384