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Consolidated Statements of Operations - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Revenue:    
Collaboration agreement revenue $ 58 $ 477
Costs and expenses:    
Research and development 4,387 7,726
Selling, general and administrative 3,672 4,395
Total costs and expenses 8,059 12,121
Operating loss (8,001) (11,644)
Other income (expense):    
Total other income (expense), net 55 73
Net loss $ (7,946) $ (11,571)
Net loss per share, basic and diluted (in dollars per share) $ (2.9) $ (8.19)
Weighted-average shares used in computing net loss per share, basic and diluted (in shares) 2,743,828 1,411,998