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UNAUDITED CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in- Capital
Accumulated Deficit
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Adoption of new accounting standard - ASC 606 $ 1,034     $ 1,034
Beginning balance (in shares) at Dec. 31, 2017   39,300,823    
Beginning balance at Dec. 31, 2017 19,975 $ 4 $ 53,586 (33,615)
Beginning balance, adjusted at Dec. 31, 2017 $ 21,009 $ 4 53,586 (32,581)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Exercise of options (in shares) 8,532 8,532    
Exercise of options $ 7   7  
Equity-based compensation 365   365  
Issuance of common stock, net (in shares)   145,466    
Issuance of common stock, net 436   436  
Net loss (5,509)     (5,509)
Ending balance (in shares) at Mar. 31, 2018   39,454,821    
Ending balance at Mar. 31, 2018 $ 16,308 $ 4 $ 54,394 $ (38,090)