CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Treasury Stock	Series A Convertible Preferred Stock Preferred Stock	Series C Convertible Preferred Stock Preferred Stock
Balance at Dec. 31, 2013	$ 7,191	$ 487	$ 51,541	$ 0	$ (44,837)	$ 0	$ 0	$ 0
Balance (in shares) at Dec. 31, 2013		46,748,575					0	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock pursuant to a public offering, net of associated fees of $1,868	24,858	$ 53	24,805
Issuance of stock pursuant to a public offering, net of associated fees of $1,868 (in shares)		5,347,500
Issuance of stock to consultant	80		80
Issuance of stock to consultant (in shares)		10,000
Stock based compensation expense	823		823
Stock warrants exercised	328	$ 3	325
Stock warrants exercised (in shares)		270,546
Stock options exercised	509	$ 5	504
Stock options exercised (in shares)		443,166
Excess tax benefits from stock compensation	94		94
Reclassification of derivative liability to equity	0
Net income (loss)	5,251				5,251
Balance at Dec. 31, 2014	39,134	$ 548	78,172	0	(39,586)	0	$ 0	$ 0
Balance (in shares) at Dec. 31, 2014		52,819,787					0	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock to consultant	31		31
Issuance of stock to consultant (in shares)		5,000
Stock based compensation expense	2,273		2,273
Stock warrants exercised	82		82
Stock warrants exercised (in shares)		67,636
Stock options exercised	83	$ 1	82
Stock options exercised (in shares)		75,766
Issuance of restricted stock	346		346
Issuance of restricted stock (in shares)		32,500
Reclassification of derivative liability to equity	18,256		18,256
Recovery from stockholder, net	19		19
Costs related to stock issuance	(3)		(3)
Cumulative translation adjustment	(130)			(130)
Net income (loss)	6,668				6,668
Balance at Dec. 31, 2015	66,759	$ 549	99,258	(130)	(32,918)	0	$ 0	$ 0
Balance (in shares) at Dec. 31, 2015		53,000,689					0	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock to consultant	189		189
Issuance of stock to consultant (in shares)		25,000
Stock based compensation expense	3,090		3,090
Stock options exercised	96	$ 1	95
Stock options exercised (in shares)		61,834
Excess tax benefits from stock compensation	28		28
Issuance of restricted stock	1	$ 1
Issuance of restricted stock (in shares)		60,918
Reclassification of derivative liability to equity	0
Recovery from stockholder, net	(36)		(36)
Cumulative translation adjustment	(1,475)			(1,475)
Net income (loss)	(11,985)				(11,985)
Balance at Dec. 31, 2016	$ 56,667	$ 551	$ 102,624	$ (1,605)	$ (44,903)	$ 0	$ 0	$ 0
Balance (in shares) at Dec. 31, 2016		53,148,441					0	0