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CONDENSED CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) (unaudited) - USD ($)
$ in Thousands
Total
Series A
Series B
Series C
IPO
Private Placement
Common Stock
Common Stock
IPO
Common Stock
Private Placement
Additional Paid In Capital
Additional Paid In Capital
IPO
Additional Paid In Capital
Private Placement
Retained Earnings
Accumulated Other Comprehensive Income
Redeemable Convertible Preferred Stock
Series A
Redeemable Convertible Preferred Stock
Series B
Redeemable Convertible Preferred Stock
Series C
Beginning Balance at Dec. 31, 2019 $ (32,738)           $ 1     $ 308     $ (33,047)   $ 28,894 $ 42,566  
Beginning Balance, Shares at Dec. 31, 2019             255,771               5,413,272 4,986,153  
Issuance of Series C redeemable convertible preferred stock for cash, Value, net of transaction costs                               $ 42,801  
Issuance of Series C redeemable convertible preferred stock for cash, shares, net of transaction costs                               3,989,432  
Issuance of common stock from vesting of restricted stock, value 40                 40              
Issuance of common stock from vesting of restricted stock, shares             30,433                    
Exercise of stock options, value 22                 22              
Exercise of stock options, shares             47,454                    
Share-based compensation 1,051                 1,051              
Net loss (32,095)                       (32,095)        
Ending Balance at Dec. 31, 2020 (63,720)           $ 1     1,421     (65,142)   $ 28,894 $ 85,367  
Ending Balance, shares at Dec. 31, 2020             333,658               5,413,272 8,975,585  
Temporary Equity, Ending Balance at Dec. 31, 2020 114,261 $ 28,894 $ 85,367                       $ 28,894 $ 85,367  
Temporary Equity, Ending balance, Shares at Dec. 31, 2020   5,413,272 8,975,585                       5,413,272 8,975,585  
Issuance of Series C redeemable convertible preferred stock for cash, Value, net of transaction costs                                 $ 91,186
Issuance of Series C redeemable convertible preferred stock for cash, shares, net of transaction costs                                 7,970,812
Issuance of Series C redeemable convertible preferred stock for cash, subscriptions                                 $ (10,000)
Issuance of common stock from vesting of restricted stock, value 5                 5              
Issuance of common stock from vesting of restricted stock, shares             7,173                    
Exercise of stock options, value 7                 7              
Exercise of stock options, shares             7,522                    
Share-based compensation 757                 757              
Net loss (11,281)                       (11,281)        
Ending Balance at Mar. 31, 2021 (74,232)           $ 1     2,190     (76,423)        
Ending Balance, shares at Mar. 31, 2021             348,353                    
Temporary Equity, Ending Balance at Mar. 31, 2021                             $ 28,894 $ 85,367 $ 91,186
Temporary Equity, Ending balance, Shares at Mar. 31, 2021                             5,413,272 8,975,585 7,970,812
Beginning Balance at Dec. 31, 2020 (63,720)           $ 1     1,421     (65,142)   $ 28,894 $ 85,367  
Beginning Balance, Shares at Dec. 31, 2020             333,658               5,413,272 8,975,585  
Temporary Equity, Beginning Balance at Dec. 31, 2020 114,261 $ 28,894 $ 85,367                       $ 28,894 $ 85,367  
Temporary Equity, Beginning balance, shares at Dec. 31, 2020   5,413,272 8,975,585                       5,413,272 8,975,585  
Issuance of Series C redeemable convertible preferred stock for cash, Value, net of transaction costs                                 $ 119,118
Issuance of Series C redeemable convertible preferred stock for cash, shares, net of transaction costs       10,396,707                         10,396,707
Issuance of common stock from vesting of restricted stock, value 8                 8              
Issuance of common stock from vesting of restricted stock, shares             10,445                    
Exercise of stock options, value 432                 432              
Exercise of stock options, shares             200,107                    
Share-based compensation 6,754                 6,754              
Unrealized loss on investment (20)                         $ (20)      
Net loss (64,969)                       (64,969)        
Ending Balance at Dec. 31, 2021 (121,515)           $ 1     8,615     (130,111) (20) $ 28,894 $ 85,367 $ 119,118
Ending Balance, shares at Dec. 31, 2021             544,210               5,413,272 8,975,585 10,396,707
Temporary Equity, Ending Balance at Dec. 31, 2021 233,379 $ 28,894 $ 85,367 $ 119,118                          
Temporary Equity, Ending balance, Shares at Dec. 31, 2021   5,413,272 8,975,585                            
Issuance of common stock, net of transaction costs, value         $ 127,283 $ 9,958   $ 9 $ 1   $ 127,274 $ 9,957          
Issuance of common stock , net of transaction costs, shares               9,487,500 590,318                
Conversion of preferred stock to common stock, value 233,379           $ 25     233,354         $ (28,894) $ (85,367) $ (119,118)
Conversion of preferred stock to common stock, shares             24,785,564               (5,413,272) (8,975,585) (10,396,707)
Issuance of common stock from vesting of restricted stock, value 107                 107              
Issuance of common stock from vesting of restricted stock, shares             24,889                    
Exercise of stock options, value 307                 307              
Exercise of stock options, shares             286,283                    
Share-based compensation 4,481                 4,481              
Unrealized loss on investment (24)                         (24)      
Net loss (32,385)                       (32,385)        
Ending Balance at Mar. 31, 2022 $ 221,591           $ 36     $ 384,095     $ (162,496) $ (44)      
Ending Balance, shares at Mar. 31, 2022             35,718,764