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Note 3 - Balance Sheet Components (Tables)
3 Months Ended
Mar. 31, 2025
Notes Tables  
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
   

March 31,

2025

   

December 31,

2024

 

Prepaid clinical trial costs

  $ 1,505,931     $ 1,524,813  

Prepaid insurance premiums

    147,117       220,675  

Prepaid rent

    13,045       13,045  

Other prepaid expenses

    10,000       10,000  

Total prepaid expenses

  $ 1,676,093     $ 1,768,533  
Property, Plant and Equipment [Table Text Block]
   

March 31,

2025

   

December 31,

2024

 

Equipment and furnishings

  $ 812,305     $ 795,411  

Leasehold improvements

    115,605       115,605  

Total property and equipment

    927,910       911,016  

Accumulated depreciation and amortization

    (777,963 )     (761,042 )

Total property and equipment, net

  $ 149,947     $ 149,974  
Schedule of Other Assets [Table Text Block]
   

March 31,

2025

   

December 31,

2024

 

Prepaid technology license fees

  $ 60,000     $ 60,000  

Deposits

    11,010       11,010  

Total other assets

  $ 71,010     $ 71,010  
Schedule of Accrued Liabilities [Table Text Block]
   

March 31,

2025

   

December 31,

2024

 

Payroll-related liabilities

  $ 177,717     $ 986,691  

Other accrued expenses

    354,575       270,881  

Total accrued expenses

  $ 532,292     $ 1,257,572