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Condensed Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional Paid-In Capital [Member]
Accumulated Deficit [Member]
Series X1 Preferred Stock [Member]
Beginning Balance at Dec. 31, 2019 $ 9,465 $ 1 $ 67,046 $ (57,582)  
Beginning Balance, Shares at Dec. 31, 2019   720,408      
Issuance of common stock in connection with exercise of warrants, net of issuance costs $ 5,191   5,191    
Issuance of common stock in connection with exercise of warrants, net of issuance costs, Shares   383,234      
Cancellation of common stock in connection with exchange for preferred stock, Shares 3,796 (210,889)      
Warrant inducement expense $ 4,829   4,829    
Stock-based compensation 437   437    
Net loss and other comprehensive loss (8,177)     (8,177)  
Ending Balance at Mar. 31, 2020 $ 11,745 $ 1 77,503 (65,759)  
Ending Balance, Shares at Mar. 31, 2020 3,796 892,753      
Beginning Balance at Dec. 31, 2020 $ 190,596 $ 15 270,974 (80,393)  
Temporary Equity, Beginning Balance, Shares at Dec. 31, 2020         108,070
Beginning Balance, Shares at Dec. 31, 2020   15,160,397      
Cancellation of common stock in connection with exchange for preferred stock, Shares 6,204 (344,666)      
Cancellation of common stock in connection with exchange for warrants   $ (1) 1    
Cancellation of common stock in connection with exchange for warrants, Shares   (509,117)      
Stock-based compensation $ 1,774   1,774    
Net loss and other comprehensive loss (8,499)     (8,499)  
Ending Balance at Mar. 31, 2021 $ 183,871 $ 14 $ 272,749 $ (88,892)  
Temporary Equity, Ending Balance, Shares at Mar. 31, 2021         108,070
Ending Balance, Shares at Mar. 31, 2021 6,204 14,306,614