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Condensed 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, 2022 $ 71,284 $ 29 $ 489,502 $ (433) $ (417,634) $ (180)
Beginning balance, Shares at Dec. 31, 2022   29,498,488        
Issuance of common stock upon release of restricted stock units, Shares   22,111        
Issuance of common stock from underwritten follow-on public offering, net of offering costs 48,073 $ 23 48,050      
Issuance of common stock from underwritten follow-on public offering, net of offering costs, Shares   23,125,000        
Issuance of common stock from at-the-market offerings, net of offering costs 1,489 $ 1 1,488      
Issuance of common stock from at the market offerings, net of offering costs, Shares   694,012        
Stock-based compensation 619   619      
Net unrealized gain (loss) on investments, net of tax 185     185    
Net gain (loss) (11,952)       (11,951) (1)
Ending balance at Mar. 31, 2023 109,698 $ 53 539,659 (248) (429,585) (181)
Ending balance, Shares at Mar. 31, 2023   53,339,611        
Beginning balance at Dec. 31, 2023 90,470 $ 63 558,692 (74) (468,023) (188)
Beginning balance, Shares at Dec. 31, 2023   63,286,404        
Issuance of common stock upon release of restricted stock units, Shares   22,111        
Issuance of common stock from at-the-market offerings, net of offering costs 8,643 $ 5 8,638      
Issuance of common stock from at the market offerings, net of offering costs, Shares   5,045,518        
Stock-based compensation 740   740      
Net unrealized gain (loss) on investments, net of tax (84)     (84)    
Net gain (loss) (15,487)       (15,491) 4
Ending balance at Mar. 31, 2024 $ 84,282 $ 68 $ 568,070 $ (158) $ (483,514) $ (184)
Ending balance, Shares at Mar. 31, 2024   68,354,033