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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Revenue $ 1,397 $ 1,456 $ 3,846 $ 4,412
Revenue, Product and Service [Extensible Enumeration] Grant [Member] Grant [Member] Grant [Member] Grant [Member]
Operating expenses:        
Research and development $ 2,436 $ 2,858 $ 5,438 $ 8,394
General and administrative 3,443 2,397 7,964 6,813
Total operating expenses 5,879 5,255 13,402 15,207
Operating loss (4,482) (3,799) (9,556) (10,795)
Other income (expense):        
Interest income 59 80 87 219
Interest expense   (61) (548) (122)
Financing expenses     (3,061) (3,545)
Warrant issuance costs   (54) (964) (486)
Change in fair value of derivative instruments   960 (2,631) 5,654
Total other income (expense) 59 925 (7,117) 1,720
Net loss $ (4,423) $ (2,874) $ (16,673) $ (9,075)
Net loss per share of common stock - basic $ (0.04) $ (0.37) $ (0.29) $ (1.46)
Weighted average number of shares of common stock outstanding - basic 107,428,969 7,855,763 57,845,406 6,232,123
Net loss per share of common stock - diluted $ (0.04) $ (0.37) $ (0.29) $ (1.67)
Weighted average number of shares of common stock outstanding - diluted 107,428,969 7,855,763 57,845,406 8,452,338