Quarterly report pursuant to Section 13 or 15(d)

Condensed Statements of Stockholders' Equity (Unaudited)

v3.21.2
Condensed Statements of Stockholders' Equity (Unaudited) - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Income (Loss)
Accumulated Deficit
Balances at Dec. 31, 2019 $ 97,789 $ 23 $ 293,346 $ 165 $ (195,745)
Common Stock Balance, Shares at Dec. 31, 2019   23,098,969      
Exercise of common stock options 56   56    
Exercise of common stock options, Shares   12,937      
Issuance of common stock under Employee Stock Purchase Plan 646   646    
Issuance of common stock under Employee Stock Purchase Plan, Shares   74,465      
Vesting of restricted stock units   41,050      
Stock-based compensation expense 2,707   2,707    
Issuance of common stock warrants in connection with debt refinancing 619   619    
Net unrealized (loss) gain on available-for- sale securities (137)     (137)  
Net (loss) income (19,595)       (19,595)
Balances at Mar. 31, 2020 82,085 $ 23 297,374 28 (215,340)
Common Stock Balance, Shares at Mar. 31, 2020   23,227,421      
Balances at Dec. 31, 2019 97,789 $ 23 293,346 165 (195,745)
Common Stock Balance, Shares at Dec. 31, 2019   23,098,969      
Net unrealized (loss) gain on available-for- sale securities 72        
Net (loss) income 27,416        
Balances at Sep. 30, 2020 244,119 $ 38 412,173 237 (168,329)
Common Stock Balance, Shares at Sep. 30, 2020   37,983,978      
Balances at Dec. 31, 2019 $ 97,789 $ 23 293,346 165 (195,745)
Common Stock Balance, Shares at Dec. 31, 2019   23,098,969      
Exercise of common stock options, Shares 257,834        
Balances at Dec. 31, 2020 $ 332,048 $ 46 559,746 129 (227,873)
Common Stock Balance, Shares at Dec. 31, 2020   45,752,116      
Balances at Mar. 31, 2020 82,085 $ 23 297,374 28 (215,340)
Common Stock Balance, Shares at Mar. 31, 2020   23,227,421      
Exercise of common stock options 8   8    
Exercise of common stock options, Shares   1,257      
Vesting of restricted stock units   250      
Stock-based compensation expense 3,011   3,011    
Issuance of common stock in connection with public offering, net of issuance costs 91,411 $ 13 91,398    
Issuance of common stock in connection with public offering, net of issuance costs, Shares   12,650,000      
Net unrealized (loss) gain on available-for- sale securities 370     370  
Net (loss) income 29,872       29,872
Balances at Jun. 30, 2020 206,757 $ 36 391,791 398 (185,468)
Common Stock Balance, Shares at Jun. 30, 2020   35,878,928      
Exercise of common stock options 108   108    
Exercise of common stock options, Shares   12,308      
Issuance of common stock under Employee Stock Purchase Plan 639   639    
Issuance of common stock under Employee Stock Purchase Plan, Shares   12,527      
Vesting of restricted stock units   110,676      
Stock transaction associated with taxes withheld on restricted stock units (314)   (314)    
Stock transaction associated with taxes withheld on restricted stock units,Shares   (30,461)      
Stock-based compensation expense 3,112   3,112    
Issuance of common stock in connection with At-The-Market sale, net of issuance costs 16,839 $ 2 16,837    
Issuance of common stock in connection with At-The-Market sale, net of issuance costs, Shares   2,000,000      
Net unrealized (loss) gain on available-for- sale securities (161)     (161)  
Net (loss) income 17,139       17,139
Balances at Sep. 30, 2020 244,119 $ 38 412,173 237 (168,329)
Common Stock Balance, Shares at Sep. 30, 2020   37,983,978      
Balances at Dec. 31, 2020 332,048 $ 46 559,746 129 (227,873)
Common Stock Balance, Shares at Dec. 31, 2020   45,752,116      
Exercise of common stock options 1,360   1,360    
Exercise of common stock options, Shares   129,161      
Issuance of common stock under Employee Stock Purchase Plan 873   873    
Issuance of common stock under Employee Stock Purchase Plan, Shares   93,346      
Vesting of restricted stock units   147,349      
Stock transaction associated with taxes withheld on restricted stock units (407)   (407)    
Stock transaction associated with taxes withheld on restricted stock units,Shares   (18,366)      
Stock-based compensation expense 3,952   3,952    
Net unrealized (loss) gain on available-for- sale securities (129)     (129)  
Net (loss) income (30,359)       (30,359)
Balances at Mar. 31, 2021 307,338 $ 46 565,524   (258,232)
Common Stock Balance, Shares at Mar. 31, 2021   46,103,606      
Balances at Dec. 31, 2020 $ 332,048 $ 46 559,746 129 (227,873)
Common Stock Balance, Shares at Dec. 31, 2020   45,752,116      
Exercise of common stock options, Shares 257,834        
Net unrealized (loss) gain on available-for- sale securities $ (159)        
Net (loss) income (67,413)        
Balances at Sep. 30, 2021 283,580 $ 46 578,850 (30) (295,286)
Common Stock Balance, Shares at Sep. 30, 2021   46,261,060      
Balances at Mar. 31, 2021 307,338 $ 46 565,524   (258,232)
Common Stock Balance, Shares at Mar. 31, 2021   46,103,606      
Exercise of common stock options 452   452    
Exercise of common stock options, Shares   40,902      
Return and retirement of common stocks   (6,804)      
Vesting of restricted stock units   3,750      
Stock-based compensation expense 5,907   5,907    
Net unrealized (loss) gain on available-for- sale securities (45)     (45)  
Net (loss) income (6,152)       (6,152)
Balances at Jun. 30, 2021 307,500 $ 46 571,883 (45) (264,384)
Common Stock Balance, Shares at Jun. 30, 2021   46,141,454      
Exercise of common stock options 160   160    
Exercise of common stock options, Shares   15,911      
Issuance of common stock under Employee Stock Purchase Plan 892   892    
Issuance of common stock under Employee Stock Purchase Plan, Shares   52,463      
Vesting of restricted stock units   81,375      
Stock transaction associated with taxes withheld on restricted stock units (580)   (580)    
Stock transaction associated with taxes withheld on restricted stock units,Shares   (30,143)      
Stock-based compensation expense 6,495   6,495    
Net unrealized (loss) gain on available-for- sale securities 15     15  
Net (loss) income (30,902)       (30,902)
Balances at Sep. 30, 2021 $ 283,580 $ 46 $ 578,850 $ (30) $ (295,286)
Common Stock Balance, Shares at Sep. 30, 2021   46,261,060