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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 Non-voting Convertible Preferred Stock [Member]
Series X 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   404,068        
Issuance of common stock in connection with conversion of preferred stock, shares   182,500       (3,285)
Issuance of common stock in connection with vesting of restricted stock units, Shares   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   (210,889)       3,796
Issuance of preferred stock in connection with acquisition         $ 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  
Issuance of preferred stock in connection with PIPE transaction, net of issuance costs, shares         199,112  
Fair value of options assumed in acquisition 3,278   3,278      
Fair value of warrants assumed in acquisition 12,944   12,944      
Warrant inducement expense 4,829   4,829      
Stock-based compensation 1,512   1,512      
Net loss and other comprehensive loss (16,907)     (16,907)    
Ending Balance at Sep. 30, 2020 21,506 $ 1 95,994 (74,489) $ 164,949  
Temporary Equity, Ending Balance, Shares at Sep. 30, 2020         339,138  
Ending Balance, Shares at Sep. 30, 2020   1,274,631       511
Beginning Balance at Jun. 30, 2020 9,356 $ 1 77,700 (68,345)    
Beginning Balance, Shares at Jun. 30, 2020   1,076,642       511
Issuance of common stock in connection with exercise of warrants, net of issuance costs, Shares   20,834        
Issuance of common stock in connection with vesting of restricted stock units, Shares   1,667        
Issuance of common stock in connection with acquisition 1,194   1,194      
Issuance of common stock in connection with acquisition, shares   175,488        
Issuance of preferred stock in connection with acquisition         $ 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  
Issuance of preferred stock in connection with PIPE transaction, net of issuance costs, shares         199,112  
Fair value of options assumed in acquisition 3,278   3,278      
Fair value of warrants assumed in acquisition 12,944   12,944      
Stock-based compensation 878   878      
Net loss and other comprehensive loss (6,144)     (6,144)    
Ending Balance at Sep. 30, 2020 21,506 $ 1 95,994 (74,489) $ 164,949  
Temporary Equity, Ending Balance, Shares at Sep. 30, 2020         339,138  
Ending Balance, Shares at Sep. 30, 2020   1,274,631       511
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   (344,666)       6,204
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 5,851   5,851      
Stock options exercised 1   1      
Stock options exercised, Shares   174        
Net loss and other comprehensive loss (25,700)     (25,700)    
Ending Balance at Sep. 30, 2021 170,748 $ 14 276,827 (106,093)    
Temporary Equity, Ending Balance, Shares at Sep. 30, 2021         108,070  
Ending Balance, Shares at Sep. 30, 2021   14,306,788       6,204
Beginning Balance at Jun. 30, 2021 178,521 $ 14 274,783 (96,276)    
Temporary Equity, Beginning Balance, Shares at Jun. 30, 2021         108,070  
Beginning Balance, Shares at Jun. 30, 2021   14,306,614       6,204
Stock-based compensation 2,043   2,043      
Stock options exercised 1   1      
Stock options exercised, Shares   174        
Net loss and other comprehensive loss (9,817)     (9,817)    
Ending Balance at Sep. 30, 2021 $ 170,748 $ 14 $ 276,827 $ (106,093)    
Temporary Equity, Ending Balance, Shares at Sep. 30, 2021         108,070  
Ending Balance, Shares at Sep. 30, 2021   14,306,788       6,204