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Consolidated Statements of Operations - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Revenue from government contract $ 852,282   $ 300,677   $ 2,489,145 $ 300,677 $ 3,954,576 $ 0
Operating expenses:                
Research and development 4,728,998   4,276,868   10,083,586 8,702,596 23,713,602 20,720,766
General and administrative 1,542,190   1,086,030   3,229,635 2,543,383 5,385,254 6,022,173
Total operating expenses 6,271,188   5,362,898   13,313,221 11,245,979 29,098,856 26,742,939
Loss from operations (5,418,906)   (5,062,221)   (10,824,076) (10,945,302) (25,144,280) (26,742,939)
Other income (expense):                
Interest income 49,123   5,471   96,642 38,420 173,359 776,177
Interest expense 0   (7,292)   0 (7,292) (21,375) 0
Total other income (expense) 49,123   (1,821)   96,642 31,128 151,984 776,177
Net loss $ (5,369,783) $ (5,357,651) $ (5,064,042) $ (5,850,132) $ (10,727,434) $ (10,914,174) $ (24,992,296) $ (25,966,762)
Basic and diluted:                
Net loss per common share (in dollars per share) $ (0.35)   $ (1.99)   $ (0.79) $ (4.68) $ (4.82) $ (14.29)
Weighted average shares outstanding (in shares) 15,359,220   2,539,878   13,597,293 2,334,464 5,187,038 1,817,282