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Condensed Consolidated Statements of Convertible Preferred Stock and Changes in Stockholders' Equity - USD ($)
$ in Thousands
Total
Series B Convertible Preferred Stock
Series C Convertible Preferred Stock
Common Stock
Additional Paid-In Capital
Accumulated Deficit
Other Comprehensive Loss
Beginning balance at Dec. 31, 2019 $ (71,148)       $ 826 $ (69,523) $ (2,451)
Beginning balance (in shares) at Dec. 31, 2019   684,068 4,125,056        
Beginning balance at Dec. 31, 2019   $ 13,414 $ 106,205        
Beginning balance (in shares) at Dec. 31, 2019       259,966      
Currency translation loss (210)           (210)
Net loss (5,674)         (5,674)  
Ending balance at Mar. 31, 2020 (77,032)       826 (75,197) (2,661)
Ending balance (in shares) at Mar. 31, 2020   684,068 4,125,056        
Ending balance at Mar. 31, 2020   $ 13,414 $ 106,205        
Ending balance (in shares) at Mar. 31, 2020       259,966      
Beginning balance at Dec. 31, 2020 165,489       269,175 (104,360) 674
Beginning balance (in shares) at Dec. 31, 2020       25,261,832      
Stock-based compensation expense 1,031       1,031    
Currency translation loss (524)           (524)
Unrealized loss on marketable securities (80)           (80)
Net loss (13,345)         (13,345)  
Ending balance at Mar. 31, 2021 $ 152,571       $ 270,206 $ (117,705) $ 70
Ending balance (in shares) at Mar. 31, 2021       25,261,832