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STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) (Unaudited) - USD ($)
$ in Thousands
Total
Initial Public Offering
Convertible Preferred Stock
Common Stock
Common Stock
Initial Public Offering
Additional Paid-in Capital
Additional Paid-in Capital
Initial Public Offering
Accumulated Deficit
Accumulated Other Comprehensive Gain (Loss)
Beginning Balance at Dec. 31, 2019     $ 178,058            
Beginning Balance (in shares) at Dec. 31, 2019     19,278,606            
Beginning Balance at Dec. 31, 2019 $ (90,084)       $ 2,606   $ (92,690)
Beginning Balance (in shares) at Dec. 31, 2019       1,984,222          
Exercise of common stock options 12         12      
Exercise of common stock options (in shares)       13,433          
Stock-based compensation expense 527         527      
Net loss (8,872)             (8,872)  
Ending Balance at Mar. 31, 2020     $ 178,058            
Ending Balance (in shares) at Mar. 31, 2020     19,278,606            
Ending Balance at Mar. 31, 2020 (98,417)       3,145   (101,562)
Ending Balance (in shares) at Mar. 31, 2020       1,997,655          
Exercise of common stock options 39         39      
Exercise of common stock options (in shares)       23,200          
Stock-based compensation expense 1,381         1,381      
Initial public offering of common stock   $ 138,000     $ 1   $ 137,999    
Initial public offering of common stock (in shares)         8,625,000        
Issuance costs associated with initial public offering   $ (12,790)         $ (12,790)    
Conversion to common stock     $ (178,058)            
Conversion to common stock (in shares)     (19,278,606)            
Conversion to common stock 178,058     $ 2   178,056      
Conversion to common stock (in shares)       19,278,606          
Net loss (11,024)             (11,024)  
Ending Balance at Jun. 30, 2020                
Ending Balance (in shares) at Jun. 30, 2020                
Ending Balance at Jun. 30, 2020 195,247     $ 3   307,830   (112,586)
Ending Balance (in shares) at Jun. 30, 2020       29,924,461          
Beginning Balance at Dec. 31, 2020 $ 289,776     $ 4   456,196   (166,393) (31)
Beginning Balance (in shares) at Dec. 31, 2020 36,672,415     36,672,415          
Exercise of common stock options $ 16         16      
Exercise of common stock options (in shares)       18,411          
Stock-based compensation expense 2,744         2,744      
Unrealized (loss) gain on available-for-sale securities 48               48
Net loss (16,509)             (16,509)  
Ending Balance at Mar. 31, 2021 276,075     $ 4   458,956   (182,902) 17
Ending Balance (in shares) at Mar. 31, 2021       36,690,826          
Beginning Balance at Dec. 31, 2020 $ 289,776     $ 4   456,196   (166,393) (31)
Beginning Balance (in shares) at Dec. 31, 2020 36,672,415     36,672,415          
Exercise of common stock options (in shares) 43,197                
Unrealized (loss) gain on available-for-sale securities $ 34                
Ending Balance at Jun. 30, 2021 $ 258,323     $ 4   462,227   (203,911) 3
Ending Balance (in shares) at Jun. 30, 2021 36,715,612     36,715,612          
Beginning Balance at Mar. 31, 2021 $ 276,075     $ 4   458,956   (182,902) 17
Beginning Balance (in shares) at Mar. 31, 2021       36,690,826          
Exercise of common stock options 58         58      
Exercise of common stock options (in shares)       24,786          
Stock-based compensation expense 3,213         3,213      
Unrealized (loss) gain on available-for-sale securities (14)               (14)
Net loss (21,009)             (21,009)  
Ending Balance at Jun. 30, 2021 $ 258,323     $ 4   $ 462,227   $ (203,911) $ 3
Ending Balance (in shares) at Jun. 30, 2021 36,715,612     36,715,612