v3.26.3
Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Dec. 30, 2020
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Mar. 13, 2026
Dec. 31, 2025
Jan. 31, 2025
Jan. 31, 2024
Oct. 31, 2023
Inventory, Raw Materials, Gross   $ 27,000   $ 27,000     $ 23,000      
Inventory, Finished Goods, Gross   $ 14,000   $ 14,000     $ 14,000      
Common Stock, Par or Stated Value Per Share (in dollars per share)   $ 0.0001   $ 0.0001     $ 0.0001      
Research and Development Expense   $ 4,447,000 $ 3,513,000 $ 8,247,000 $ 8,508,000          
General and Administrative Expense   1,940,000 2,150,000 5,617,000 7,183,000          
Government Assistance, Award Amount           $ 8,000,000   $ 8,000,000 $ 7,300,000  
Government Assistance, Asset, Current, Type [Extensible Enumeration]           Subawards [Member]   Subawards [Member] Subawards [Member]  
Grant Funding on Conditional Grants [Member]                    
Research and Development Expense   2,100,000 2,300,000 8,000,000 8,500,000          
General and Administrative Expense   100,000 100,000 400,000 400,000          
NIH Grant Total [Member]                    
Government Assistance, Award Amount                   $ 45,100,000
Subawards [Member]                    
Government Assistance, Cash Receipt   $ 2,200,000 $ 2,200,000 $ 8,300,000 $ 8,600,000          
Reverse Recapitalization [Member] | Clene Nanomedicine Contingent Earn-out [Member]                    
Business Combination, Contingent Earnout, Milestone One, Period (Year) 3 years                  
Business Combination, Contingent Earnout, Milestone Two, Period (Year) 5 years                  
Maximum [Member] | Subawards [Member]                    
Government Assistance, Award Amount                   $ 30,900,000
Equipment [Member] | Minimum [Member]                    
Property, Plant and Equipment, Useful Life (Year)   3 years   3 years            
Equipment [Member] | Maximum [Member]                    
Property, Plant and Equipment, Useful Life (Year)   5 years   5 years            
Furniture and Fixtures [Member] | Minimum [Member]                    
Property, Plant and Equipment, Useful Life (Year)   3 years   3 years            
Furniture and Fixtures [Member] | Maximum [Member]                    
Property, Plant and Equipment, Useful Life (Year)   7 years   7 years            
Computer Equipment [Member] | Minimum [Member]                    
Property, Plant and Equipment, Useful Life (Year)   2 years   2 years            
Computer Equipment [Member] | Maximum [Member]                    
Property, Plant and Equipment, Useful Life (Year)   5 years   5 years