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Note 12 - Segments - Schedule of Segment Information (Details) - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Revenues $ 4,006,510 $ 9,737,974
Research and Development Expense 21,817,072 18,798,343
Stock-based compensation 1,448,634 1,405,722
Total general and administrative expenses 10,484,315 9,166,762
Other income 1,328,510 1,936,436
Net loss (26,966,367) (16,290,695)
Operating Segments [Member]    
Revenues 4,006,510 9,737,974
Research and Development Expense 21,817,072 18,798,343
Personnel costs, excluding stock-based compensation 4,988,705 3,995,114
Stock-based compensation 965,965 1,186,900
Professional fees 2,752,710 2,684,386
Insurance, taxes and similar fees 1,166,374 985,481
Other general and administrative expenses, including IT, facilities, supplies and similar costs*** [1] 610,561 314,879
Total general and administrative expenses 10,484,315 9,166,760
Other income 1,328,510 1,936,436
Net loss (26,966,367) (16,290,693)
Operating Segments [Member] | Dementia with Lewy bodies [Member]    
Research and Development Expense 7,052,512 12,102,842
Operating Segments [Member] | Frontotemporal Disorders [Member]    
Research and Development Expense 1,217,784 36,853
Operating Segments [Member] | Recovery After Stroke [Member]    
Research and Development Expense 1,427,966 391,659
Operating Segments [Member] | Other Clinical and Nonclinical [Member]    
Research and Development Expense [2] 2,504,863 2,499,202
Operating Segments [Member] | Personnel Costs [Member]    
Research and Development Expense 5,745,558 2,187,221
Operating Segments [Member] | Stock Based Compensation [Member]    
Research and Development Expense 482,669 218,822
Operating Segments [Member] | Other Research and Development Costs [Member]    
Research and Development Expense [3] $ 3,385,720 $ 1,361,744
[1] Includes, among other things, costs related to IT systems, rent and other facilities, office supplies, and similar costs.
[2] Includes early-stage clinical studies that are not indication-specific and related costs.
[3] Includes, among other things, CMC-related costs, shipping, packaging and storage costs, certain consulting costs, and other miscellaneous research development expenses.