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Condensed Consolidated Statements of Convertible Preferred Shares and Shareholders' Equity (Deficit) (Unaudited) - USD ($)
$ in Thousands
Total
Series A Convertible Preferred Shares
Series B Convertible Preferred Shares
Common Shares
Additional Paid-in Capital
Accumulated Deficit
Balance at Dec. 31, 2019 $ (46,129)     $ 1 $ 3,811 $ (49,941)
Temporary equity balance, Shares at Dec. 31, 2019   11,090,135 10,468,258      
Temporary equity balance, Value at Dec. 31, 2019   $ 53,749 $ 82,248      
Balance, Shares at Dec. 31, 2019       1,528,374    
Exercise of stock options $ 324     $ 520 (196)  
Exercise of stock options, Shares 181,318     181,318    
Share-based compensation expense $ 271       271  
Net loss and comprehensive loss (12,601)         (12,601)
Balance at Mar. 31, 2020 (58,135)     $ 521 3,886 (62,542)
Temporary equity balance, Shares at Mar. 31, 2020   11,090,135 10,468,258      
Temporary equity balance, Value at Mar. 31, 2020   $ 53,749 $ 82,248      
Balance, Shares at Mar. 31, 2020       1,709,692    
Balance at Dec. 31, 2020 286,830     $ 384,313 5,875 (103,358)
Balance, Shares at Dec. 31, 2020       36,902,924    
Exercise of stock options $ 183     $ 297 (114)  
Exercise of stock options, Shares 87,786     87,786    
Share-based compensation expense $ 2,057       2,057  
Net loss and comprehensive loss (21,417)         (21,417)
Balance at Mar. 31, 2021 $ 267,653     $ 384,610 $ 7,818 $ (124,775)
Balance, Shares at Mar. 31, 2021       36,990,710