Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity
Cumulative effect due to adoption of new accounting standard, net of taxes	$ 64			$ 64
Balance (in shares) at Dec. 31, 2017	19,511,276	19,511,276
Beginning Balance at Dec. 31, 2017	$ 20,648	$ 20	$ 88,447	(67,812)	$ (7)
Increase (Decrease) in Stockholders' Equity
Issuance of common stock for compensation (in shares)		478,816
Stock-based compensation	2,747		2,747
Sales of common stock, net of offering costs (in shares)		6,571,428
Sales of common stock, net of offering costs	21,190	$ 7	21,183
Exercise of warrants, cashless (in warrants)		89,142
Exercise of warrants	$ 260		260
Common stock issued in exchange for warrants (in shares)	242,913
Exercise of stock options (in shares)		4,692
Exercise of stock options	$ 14		14
Net loss	(11,668)			(11,668)
Foreign currency translation adjustments, net of tax	$ 15				15
Balance (in shares) at Jun. 30, 2018	26,898,267	26,898,267
Ending Balance at Jun. 30, 2018	$ 33,240	$ 27	$ 112,651	$ (79,416)	$ (22)