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Condensed Consolidated Statements of Operations (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Costs and expenses:    
Research and development $ 1,235 $ 1,530
Selling, general and administrative 1,031 1,196
Total costs and expenses 2,266 2,726
Operating loss (2,266) (2,726)
Other income (expense):    
Total other income, net 7 14
Net loss $ (2,259) $ (2,712)
Net loss per share, basic (in dollars per share) $ (0.21) $ (0.59)
Net loss per share, diluted (in dollars per share) $ (0.21) $ (0.59)
Weighted-average shares used in computing net loss per share, basic (in shares) 10,812,419 4,635,764
Weighted-average shares used in computing net loss per share, diluted (in shares) 10,812,419 4,635,764