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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional Paid-In Capital [Member]
Accumulated Deficit [Member]
Series X1 Non-Voting Convertible Preferred Stock [Member]
Series X1 Non-Voting Convertible Preferred Stock [Member]
Common Stock [Member]
Beginning Balance at Dec. 31, 2018 $ 14,492 $ 1 $ 56,062 $ (41,571)    
Beginning Balance, Shares at Dec. 31, 2018   523,452        
Issuance of common stock in connection with vesting of restricted stock units   4,359        
Issuance of common stock at-the-market, net of issuance costs 107   107      
Issuance of common stock at-the-market, net of issuance costs, Shares   1,401        
Issuance of common stock and warrants in registered direct offering, net of issuance costs 9,569   9,569      
Issuance of common stock and warrants in registered direct offering, net of issuance costs, shares   191,617        
Cancellation of common stock, Shares   (421)        
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 $ 1 67,046 (57,582)    
Ending Balance, Shares at Dec. 31, 2019   720,408        
Issuance of common stock in connection with PIPE transaction, net of issuance costs 8,550 $ 1 8,549      
Issuance of preferred stock in connection with PIPE transaction, net of issuance costs, Shares   1,004,111        
Issuance of common stock in connection with exercise of warrants, net of issuance costs $ 5,380   5,380      
Issuance of common stock in connection with exercise of warrants, net of issuance costs, Shares   421,772        
Issuance of common stock in connection with conversion of Series X preferred stock     (13)     $ 13
Issuance of common stock in connection with conversion of Series X preferred stock, Shares (3,796) 210,888     (231,068) 12,837,056
Issuance of common stock in connection with vesting of restricted stock units   3,056        
Issuance of common stock in connection with acquisition $ 1,194   1,194      
Issuance of common stock in connection with acquisition, shares   175,488        
Cancellation of common stock in connection with exchange for preferred stock, Shares 3,796 (210,889)        
Cancellation of common stock in connection with reverse split $ (25)   (25)      
Cancellation of common stock in connection with reverse split, Shares   (1,493)        
Issuance of preferred stock in connection with acquisition 69,723   69,723      
Issuance of preferred stock in connection with acquisition,shares         140,026  
Issuance of preferred stock in connection with PIPE transaction, net of issuance costs 95,226   95,226      
Issuance of preferred stock in connection with PIPE transaction, net of issuance costs, shares         199,112  
Fair value of options assumed in acquisition 2,950   2,950      
Fair value of warrants assumed in acquisition 12,944   12,944      
Warrant inducement expense 4,829   4,829      
Stock-based compensation 3,171   3,171      
Net loss and other comprehensive loss (22,811)     (22,811)    
Ending Balance at Dec. 31, 2020 $ 190,596 $ 15 $ 270,974 $ (80,393)    
Temporary Equity, Ending Balance, Shares at Dec. 31, 2020         108,070  
Ending Balance, Shares at Dec. 31, 2020   15,160,397