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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) - USD ($)
shares in Thousands, $ in Thousands
Total
Class A Preferred Shares
Class B Preferred Shares
Class C Preferred Shares
Common Stock
Common Stock
Class A Preferred Shares
Common Stock
Class B Preferred Shares
Common Stock
Class C Preferred Shares
Additional Paid-In Capital
Additional Paid-In Capital
Class A Preferred Shares
Additional Paid-In Capital
Class B Preferred Shares
Additional Paid-In Capital
Class C Preferred Shares
Accumulated Deficit
Beginning Balance at Dec. 31, 2019 $ (113,504)               $ (17,443)       $ (96,061)
Beginning Balance, shares at Dec. 31, 2019         164                
Issuance of common stock under stock plans, net 8               8        
Issuance of common stock under stock plans, net, shares         5                
Conversion of Convertible Preferred Shares 112,001 $ 4,229 $ 52,103 $ 55,669     $ 2 $ 3   $ 4,229 $ 52,101 $ 55,666  
Conversion of Convertible Preferred Shares, shares   124 1,989 2,959   124 1,989 2,959          
Dividends on preferred shares (1,666)               (1,666)        
Effect of foreign exchange on preferred shares 7,756               7,756        
Stock-based compensation 1,711               1,711        
Net loss (10,227)                       (10,227)
Ending Balance at Dec. 31, 2020 $ (3,921)       $ 5       102,362       (106,288)
Ending Balance, shares at Dec. 31, 2020 5,241       5,241                
Issuance of common stock under stock plans, net $ 37               37        
Issuance of common stock under stock plans, net, shares         30                
Settlement of warrants to common stock 1,208       $ 1       1,207        
Settlement of warrants to common stock, shares         287                
Conversion of convertible debentures to common stock 13,545       $ 7       13,538        
Conversion of convertible debentures to common stock, shares         7,305                
Effect of business combination 37,627       $ 9       37,618        
Effect of business combination, shares         8,716                
Stock-based compensation 4,484               4,484        
Net loss (10,911)                       (10,911)
Ending Balance at Dec. 31, 2021 $ 42,069       $ 22       $ 159,246       $ (117,199)
Ending Balance, shares at Dec. 31, 2021 21,579       21,579