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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional Paid-In Capital [Member]
Accumulated Deficit [Member]
Beginning Balance at Dec. 31, 2017 $ 19,452 $ 7 $ 46,951 $ (27,506)
Beginning Balance, Shares at Dec. 31, 2017   7,110,414    
Issuance of common stock at-the-market, net of issuance costs 7,491 $ 2 7,489  
Issuance of common stock at-the-market, Shares   2,296,610    
Issuance of common stock in connection with exercise of options 71   71  
Issuance of common stock in connection with exercise of options, Shares   15,119    
Stock-based compensation 1,543   1,543  
Net loss and other comprehensive loss (14,065)     (14,065)
Ending Balance at Dec. 31, 2018 14,492 $ 9 56,054 (41,571)
Ending Balance, Shares at Dec. 31, 2018   9,422,143    
Issuance of common stock at-the-market, net of issuance costs 107   107  
Issuance of common stock at-the-market, Shares   25,218    
Issuance of common stock and warrants in registered direct offering, net of issuance costs 9,569 $ 4 9,565  
Issuance of common stock and warrants in registered direct offering, net of issuance costs, shares   3,449,112    
Issuance of common stock in connection with vesting of restricted stock units, Shares   78,450    
Cancellation of common stock, Shares   (7,585)    
Stock-based compensation 1,308   1,308  
Net loss and other comprehensive loss (16,011)     (16,011)
Ending Balance at Dec. 31, 2019 $ 9,465 $ 13 $ 67,034 $ (57,582)
Ending Balance, Shares at Dec. 31, 2019   12,967,338