v3.24.0.1
Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional Paid-In Capital [Member]
Other Comprehensive Gain/(Loss) [Member]
Accumulated Deficit [Member]
Noncontrolling Interest [Member]
Beginning balance at Dec. 31, 2020 $ 31,484 $ 11 $ 370,210 $ (43) $ (338,528) $ (166)
Beginning balance, Shares at Dec. 31, 2020   11,018,954        
Issuance of common stock upon release of restricted stock units, Shares   4,177        
Issuance of common stock upon exercise of stock options 62   62      
Issuance of common stock upon exercise of stock options, Shares   10,751        
Issuance of common stock pursuant to employee stock purchase plan 11   11      
Issuance of common stock pursuant to employee stock purchase plan, Shares   3,382        
Issuance of common stock from at-the-market offerings, net of offering costs 14,070 $ 3 14,067      
Issuance of common stock from at the market offerings, net of offering costs, Shares   2,974,521        
Issuance of common stock from committed purchase agreement, net of offering costs 15,236 $ 3 15,233      
Issuance of common stock from committed purchase agreement, net of offering costs, Shares   3,000,000        
Issuance of common stock from underwritten follow-on offering, net of offering costs 80,646 $ 11 80,635      
Issuance of common stock from underwritten follow-on offering, net of offering costs, Shares   10,781,250        
Stock-based compensation 1,614   1,614      
Net unrealized gain (loss) on investments, net of tax (220)     (220)    
Net loss (33,777)       (33,768) (9)
Ending balance at Dec. 31, 2021 109,126 $ 28 481,832 (263) (372,296) (175)
Ending balance, Shares at Dec. 31, 2021   27,793,035        
Issuance of common stock upon release of restricted stock units, Shares   2,500        
Issuance of common stock upon exercise of stock options 1   1      
Issuance of common stock upon exercise of stock options, Shares   259        
Issuance of common stock pursuant to employee stock purchase plan 44   44      
Issuance of common stock pursuant to employee stock purchase plan, Shares   20,612        
Issuance of common stock from at-the-market offerings, net of offering costs 5,472 $ 1 5,471      
Issuance of common stock from at the market offerings, net of offering costs, Shares   1,682,082        
Stock-based compensation 2,154   2,154      
Net unrealized gain (loss) on investments, net of tax (170)     (170)    
Net loss (45,343)       (45,338) (5)
Ending balance at Dec. 31, 2022 71,284 $ 29 489,502 (433) (417,634) (180)
Ending balance, Shares at Dec. 31, 2022   29,498,488        
Issuance of common stock upon release of restricted stock units, Shares   58,111        
Issuance of common stock pursuant to employee stock purchase plan 105   105      
Issuance of common stock pursuant to employee stock purchase plan, Shares   74,010        
Issuance of common stock from at-the-market offerings, net of offering costs 18,446 $ 11 18,435      
Issuance of common stock from at the market offerings, net of offering costs, Shares   10,530,795        
Issuance of common stock from underwritten follow-on offering, net of offering costs 48,073 $ 23 48,050      
Issuance of common stock from underwritten follow-on offering, net of offering costs, Shares   23,125,000        
Stock-based compensation 2,600   2,600      
Net unrealized gain (loss) on investments, net of tax 359     359    
Net loss (50,397)       (50,389) (8)
Ending balance at Dec. 31, 2023 $ 90,470 $ 63 $ 558,692 $ (74) $ (468,023) $ (188)
Ending balance, Shares at Dec. 31, 2023   63,286,404