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STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-In Capital
Accumulated Deficit
Beginning Balance at Dec. 31, 2019 $ 7,610 $ 2 $ 152,024 $ (144,416)
Beginning Balance, shares at Dec. 31, 2019   1,594,070    
Issuance of common stock for cash, net of offering costs 48,606 $ 8 48,598  
Issuance of common stock for cash, net of offering costs, shares   7,954,080    
Share-based compensation 43   43  
Net loss (9,738)     (9,738)
Ending Balance at Dec. 31, 2020 $ 46,521 $ 10 200,665 (154,154)
Ending Balance, shares at Dec. 31, 2020 9,548,150 9,548,150    
Issuance of common stock for cash, net of offering costs $ 23,347 $ 4 23,343  
Issuance of common stock for cash, net of offering costs, shares   4,861,993    
Share-based compensation 497   497  
Net loss (19,322)     (19,322)
Ending Balance at Dec. 31, 2021 $ 51,043 $ 14 $ 224,505 $ (173,476)
Ending Balance, shares at Dec. 31, 2021 14,410,143 14,410,143