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Condensed Statements of Preferred Stock and Stockholders' Equity (Deficit) - USD ($)
$ in Thousands
Total
Preferred Stock
Common Stock
Additional Paid-In Capital
Accumulated Deficit
Preferred stock, outstanding (shares) at Dec. 31, 2019   8,249,939      
Beginning balance at Dec. 31, 2019 $ (6,005) $ 63,402 $ 2 $ 27 $ (6,034)
Beginning balance (shares) at Dec. 31, 2019     2,646,619    
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income (loss) (1,957)       (1,957)
Recognition of stock-based compensation expense 4     4  
Lapse of repurchase rights related to common stock issued pursuant to early exercises (shares)     4,300    
Preferred stock, outstanding (shares) at Mar. 31, 2020   8,249,939      
Ending balance at Mar. 31, 2020 (7,958) $ 63,402 $ 2 31 (7,991)
Ending balance (shares) at Mar. 31, 2020     2,650,919    
Preferred stock, outstanding (shares) at Dec. 31, 2019   8,249,939      
Beginning balance at Dec. 31, 2019 (6,005) $ 63,402 $ 2 27 (6,034)
Beginning balance (shares) at Dec. 31, 2019     2,646,619    
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income (loss) (5,207)        
Shares issued as consideration for in-license rights 0        
Preferred stock, outstanding (shares) at Jun. 30, 2020   8,249,939      
Ending balance at Jun. 30, 2020 (11,035) $ 63,402 $ 2 204 (11,241)
Ending balance (shares) at Jun. 30, 2020     2,651,996    
Preferred stock, outstanding (shares) at Mar. 31, 2020   8,249,939      
Beginning balance at Mar. 31, 2020 (7,958) $ 63,402 $ 2 31 (7,991)
Beginning balance (shares) at Mar. 31, 2020     2,650,919    
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income (loss) (3,250)       (3,250)
Recognition of stock-based compensation expense 173     173  
Exercise of vested stock options (shares)     1,000    
Preferred stock, outstanding (shares) at Jun. 30, 2020   8,249,939      
Ending balance at Jun. 30, 2020 $ (11,035) $ 63,402 $ 2 204 (11,241)
Ending balance (shares) at Jun. 30, 2020     2,651,996    
Preferred stock, outstanding (shares) at Dec. 31, 2020 0 0      
Beginning balance at Dec. 31, 2020 $ 165,980 $ 0 $ 4 198,821 (32,845)
Beginning balance (shares) at Dec. 31, 2020 20,323,301   20,323,201    
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income (loss) $ 10,376       10,376
Recognition of stock-based compensation expense 1,363     1,363  
Exercise of vested stock options (shares)     13,773    
Exercise of vested stock options 19     19  
Shares issued as consideration for in-license rights (shares)     187,500    
Shares issued as consideration for in-license rights 5,494     5,494  
Preferred stock, outstanding (shares) at Mar. 31, 2021   0      
Ending balance at Mar. 31, 2021 $ 183,232 $ 0 $ 4 205,697 (22,469)
Ending balance (shares) at Mar. 31, 2021     20,524,474    
Preferred stock, outstanding (shares) at Dec. 31, 2020 0 0      
Beginning balance at Dec. 31, 2020 $ 165,980 $ 0 $ 4 198,821 (32,845)
Beginning balance (shares) at Dec. 31, 2020 20,323,301   20,323,201    
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income (loss) $ 16,721        
Shares issued as consideration for in-license rights $ 5,494        
Preferred stock, outstanding (shares) at Jun. 30, 2021 0 0      
Ending balance at Jun. 30, 2021 $ 192,471 $ 0 $ 4 208,591 (16,124)
Ending balance (shares) at Jun. 30, 2021 20,573,951   20,573,951    
Preferred stock, outstanding (shares) at Mar. 31, 2021   0      
Beginning balance at Mar. 31, 2021 $ 183,232 $ 0 $ 4 205,697 (22,469)
Beginning balance (shares) at Mar. 31, 2021     20,524,474    
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income (loss) 6,345       6,345
Recognition of stock-based compensation expense 2,794     2,794  
Exercise of vested stock options (shares)     255    
Exercise of vested stock options 1     1  
Lapse of repurchase rights related to common stock issued pursuant to early exercises (shares)     49,222    
Lapse of repurchase rights related to common stock issued pursuant to early exercises $ 99     99  
Preferred stock, outstanding (shares) at Jun. 30, 2021 0 0      
Ending balance at Jun. 30, 2021 $ 192,471 $ 0 $ 4 $ 208,591 $ (16,124)
Ending balance (shares) at Jun. 30, 2021 20,573,951   20,573,951