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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Operating expenses:        
Research and development $ 8,074 $ 6,450 $ 16,132 $ 11,349
General and administrative 1,588 1,743 3,465 3,161
Total operating expenses 9,662 8,193 19,597 14,510
Total operating loss (9,662) (8,193) (19,597) (14,510)
Other income (expense):        
Interest income 3 1 4 2
Interest expense (229) (85) (456) (107)
Change in fair value of derivative 275 (172) 504 (172)
Total other income (expense) 49 (256) 52 (277)
Net loss (9,613) (8,449) (19,545) (14,787)
Preferred stock dividends (64) (65) (48) (67)
Net loss applicable to common stockholders $ (9,677) $ (8,514) $ (19,593) $ (14,854)
Net loss per common share - basic (in dollars per share) $ (0.16) $ (0.15) $ (0.33) $ (0.26)
Net loss per common share - diluted (in dollars per share) $ (0.16) $ (0.15) $ (0.33) $ (0.26)
Weighted average common shares outstanding - basic (in shares) 59,389 58,312 59,372 57,725
Weighted average common shares outstanding - diluted (in shares) 59,389 58,312 59,372 57,725