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Consolidated Statements of Comprehensive Loss-Unaudited - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Revenues:        
Collaborative agreements $ 291 $ 0 $ 291 $ 0
Royalties and other revenue 26 35 49 72
Total revenues 317 35 340 72
Operating expenses:        
Cost of sales (including finite-lived intangible asset amortization) 8 0 8 0
Research and development, including stock-based compensation of $1,302, $1,098, $2,505 and $2,130, respectively 14,541 13,356 26,567 28,282
Selling, general and administrative, including stock-based compensation of $2,513, $1,734, $4,725, and $3,474, respectively 30,008 10,686 49,147 19,177
Costs and Expenses 44,557 24,042 75,722 47,459
Loss from operations (44,240) (24,007) (75,382) (47,387)
Interest expense (1,960) (703) (3,781) (813)
Interest and other income, net 1,296 123 2,325 137
Net loss $ (44,904) $ (24,587) $ (76,838) $ (48,063)
Net income (loss) per common share, Basic $ (0.22) $ (0.16) $ (0.39) $ (0.32)
Shares used in computing net loss per common share, Basic 204,783 149,616 196,942 149,384
Unrealized gain on investments $ 63 $ (113) $ 328 $ (140)
Comprehensive loss $ (44,841) $ (24,700) $ (76,510) $ (48,203)