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Condensed Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
2022 ATM Equity Offering Program [Member]
Private Investment In Public Equity [Member]
Common Stock [Member]
Common Stock [Member]
2022 ATM Equity Offering Program [Member]
Common Stock [Member]
Private Investment In Public Equity [Member]
Additional Paid-In Capital [Member]
Additional Paid-In Capital [Member]
2022 ATM Equity Offering Program [Member]
Additional Paid-In Capital [Member]
Private Investment In Public Equity [Member]
Accumulated Other Comprehensive Gain (Loss) [Member]
Accumulated Deficit [Member]
Balance at Dec. 31, 2020 $ 166,739     $ 18     $ 493,023     $ 0 $ (326,302)
Balance, shares at Dec. 31, 2020       47,552,693              
Unrealized gain (loss) on marketable securities 7                 7  
Offering costs related to the sale of common stock and pre-funded warrants (451)           (451)        
Issuance of common stock under Sales Purchase Agreement, net of issuance costs 20,830           20,830        
Issuance of common stock under Sales Purchase Agreement, shares       1,169,591              
Issuance of common stock   $ 2,231 $ 52,732     $ 1   $ 2,231 $ 52,731    
Issuance of common stock, net of issuance costs, shares         225,165 5,000,000          
Issuance of common stock for warrant exercises, Value 40     $ 1     39        
Issuance of common stock for warrant exercises, shares       9,555,876              
Issuance of common stock under employee stock purchase plan (“ESPP”) 279           279        
Issuance of common stock under employee stock purchase plan (“ESPP”), shares       109,564              
Issuance of common stock upon exercise of stock options 3,108           3,108        
Issuance of common stock upon exercise of stock options, shares       638,692              
Stock-based compensation 7,753           7,753        
Net income (loss) (45,313)                   (45,313)
Balance at Sep. 30, 2021 207,955     $ 20     579,543     7 (371,615)
Balance, shares at Sep. 30, 2021       64,251,581              
Balance at Dec. 31, 2020 166,739     $ 18     493,023     0 (326,302)
Balance, shares at Dec. 31, 2020       47,552,693              
Balance at Dec. 31, 2021 216,086     $ 20     617,523     (73) (401,384)
Balance, shares at Dec. 31, 2021       69,047,878              
Balance at Jun. 30, 2021 178,825     $ 18     522,290     14 (343,497)
Balance, shares at Jun. 30, 2021       49,433,361              
Unrealized gain (loss) on marketable securities (7)                 (7)  
Issuance of common stock   602 $ 52,732     $ 1   602 $ 52,731    
Issuance of common stock, net of issuance costs, shares         55,062 5,000,000          
Issuance of common stock for warrant exercises, Value 40     $ 1     39        
Issuance of common stock for warrant exercises, shares       9,555,876              
Issuance of common stock upon exercise of stock options 1,062           1,062        
Issuance of common stock upon exercise of stock options, shares       207,282              
Stock-based compensation 2,819           2,819        
Net income (loss) (28,118)                   (28,118)
Balance at Sep. 30, 2021 207,955     $ 20     579,543     7 (371,615)
Balance, shares at Sep. 30, 2021       64,251,581              
Balance at Dec. 31, 2021 216,086     $ 20     617,523     (73) (401,384)
Balance, shares at Dec. 31, 2021       69,047,878              
Unrealized gain (loss) on marketable securities (208)                 (208)  
Issuance of common stock upon restricted stock units vesting, net of shares withheld, Shares       215,350              
Tax payments related to shares withheld for vested restricted stock units (890)           (890)        
Issuance of common stock   197           197      
Issuance of common stock, net of issuance costs, shares         95,000            
Issuance of common stock for warrant exercises, Value 34           34        
Issuance of common stock for warrant exercises, shares       3,442,567              
Issuance of common stock under employee stock purchase plan (“ESPP”) 331           331        
Issuance of common stock under employee stock purchase plan (“ESPP”), shares       193,256              
Issuance of common stock upon exercise of stock options $ 145           145        
Issuance of common stock upon exercise of stock options, shares 140,000     140,000              
Stock-based compensation $ 9,549           9,549        
Net income (loss) (88,397)                   (88,397)
Balance at Sep. 30, 2022 136,847     $ 20     626,889     (281) (489,781)
Balance, shares at Sep. 30, 2022       73,134,051              
Balance at Jun. 30, 2022 163,378     $ 20     623,583     (410) (459,815)
Balance, shares at Jun. 30, 2022       73,006,089              
Unrealized gain (loss) on marketable securities 129                 129  
Issuance of common stock   $ 197           $ 197      
Issuance of common stock, net of issuance costs, shares         95,000            
Issuance of common stock upon exercise of stock options 45           45        
Issuance of common stock upon exercise of stock options, shares       32,962              
Stock-based compensation 3,064           3,064        
Net income (loss) (29,966)                   (29,966)
Balance at Sep. 30, 2022 $ 136,847     $ 20     $ 626,889     $ (281) $ (489,781)
Balance, shares at Sep. 30, 2022       73,134,051