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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)
$ in Thousands
Total
Follow-on Public Offering
At The Market Offering
Public Offering
Common Stock
Common Stock
Follow-on Public Offering
Common Stock
At The Market Offering
Common Stock
Public Offering
Additional Paid-In Capital
Additional Paid-In Capital
Follow-on Public Offering
Additional Paid-In Capital
At The Market Offering
Additional Paid-In Capital
Public Offering
Accumulated Deficit
Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2019 $ 130,349       $ 2       $ 200,119       $ (69,901) $ 129
Balance, Shares at Dec. 31, 2019         22,600,338                  
Issuance of common stock   $ 44,659       $ 1       $ 44,658        
Issuance of common stock, shares           2,400,000                
Restricted common stock vested in the period, Shares         33,398                  
Stock-based compensation 2,573               2,573          
Net loss (21,310)                       (21,310)  
Other comprehensive income (loss) (153)                         (153)
Balance at Mar. 31, 2020 156,118       $ 3       247,350       (91,211) (24)
Balance, Shares at Mar. 31, 2020         25,033,736                  
Balance at Dec. 31, 2019 130,349       $ 2       200,119       (69,901) 129
Balance, Shares at Dec. 31, 2019         22,600,338                  
Net loss (66,067)                          
Balance at Sep. 30, 2020 120,255       $ 3       256,048       (135,968) 172
Balance, Shares at Sep. 30, 2020         25,210,885                  
Balance at Dec. 31, 2019 130,349       $ 2       200,119       (69,901) 129
Balance, Shares at Dec. 31, 2019         22,600,338                  
Balance at Dec. 31, 2020 172,095       $ 3       345,180       (173,171) 83
Balance, Shares at Dec. 31, 2020         29,776,544                  
Balance at Mar. 31, 2020 156,118       $ 3       247,350       (91,211) (24)
Balance, Shares at Mar. 31, 2020         25,033,736                  
Issuance of common stock in connection with common stock option exercises 25               25          
Issuance of common stock in connection with common stock option exercises, Shares         4,203                  
Restricted common stock vested in the period, Shares         33,398                  
Stock-based compensation 2,974               2,974          
Net loss (23,251)                       (23,251)  
Other comprehensive income (loss) 342                         342
Balance at Jun. 30, 2020 136,208       $ 3       250,349       (114,462) 318
Balance, Shares at Jun. 30, 2020         25,071,337                  
Issuance of common stock in connection with common stock option exercises 27               27          
Issuance of common stock in connection with common stock option exercises, Shares         7,442                  
Issuance of common stock     $ 2,244               $ 2,244      
Issuance of common stock, shares             98,708              
Restricted common stock vested in the period, Shares         33,398                  
Stock-based compensation 3,428               3,428          
Net loss (21,506)                       (21,506)  
Other comprehensive income (loss) (146)                         (146)
Balance at Sep. 30, 2020 120,255       $ 3       256,048       (135,968) 172
Balance, Shares at Sep. 30, 2020         25,210,885                  
Balance at Dec. 31, 2020 172,095       $ 3       345,180       (173,171) 83
Balance, Shares at Dec. 31, 2020         29,776,544                  
Issuance of common stock in connection with common stock option exercises 80               80          
Issuance of common stock in connection with common stock option exercises, Shares         12,535                  
Issuance of common stock       $ 7,038               $ 7,038    
Issuance of common stock, shares               375,654            
Restricted common stock vested in the period, Shares         33,396                  
Stock-based compensation 5,285               5,285          
Net loss (50,532)                       (50,532)  
Other comprehensive income (loss) (83)                         (83)
Balance at Mar. 31, 2021 133,883       $ 3       357,583       (223,703)  
Balance, Shares at Mar. 31, 2021         30,198,129                  
Balance at Dec. 31, 2020 172,095       $ 3       345,180       (173,171) 83
Balance, Shares at Dec. 31, 2020         29,776,544                  
Net loss (141,534)                          
Balance at Sep. 30, 2021 56,396       $ 3       371,104       (314,705) (6)
Balance, Shares at Sep. 30, 2021         30,406,303                  
Balance at Mar. 31, 2021 133,883       $ 3       357,583       (223,703)  
Balance, Shares at Mar. 31, 2021         30,198,129                  
Issuance of common stock in connection with common stock option exercises 295               295          
Issuance of common stock in connection with common stock option exercises, Shares         41,668                  
Restricted common stock vested in the period, Shares         33,400                  
Issuance of shares in connection with ESPP 643               643          
Issuance of shares in connection with ESPP, Shares         43,976                  
Stock-based compensation 4,823               4,823          
Net loss (43,894)                       (43,894)  
Other comprehensive income (loss) (13)                         (13)
Balance at Jun. 30, 2021 95,737       $ 3       363,344       (267,597) (13)
Balance, Shares at Jun. 30, 2021         30,317,173                  
Issuance of common stock in connection with common stock option exercises 345               345      
Issuance of common stock in connection with common stock option exercises, Shares         55,734                  
Restricted common stock vested in the period, Shares         33,396                  
Stock-based compensation 7,415               7,415          
Net loss (47,108)                       (47,108)  
Other comprehensive income (loss) 7                         7
Balance at Sep. 30, 2021 $ 56,396       $ 3       $ 371,104       $ (314,705) $ (6)
Balance, Shares at Sep. 30, 2021         30,406,303