v3.26.1
Note 2 - Fair Value Measurements - Financial Instruments Measured at Fair Value on a Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($)
Dec. 31, 2025
Dec. 31, 2024
Investments, fair value $ 3,161,358 $ 3,161,358
Fair Value, Inputs, Level 1 [Member]    
Investments, fair value 0 0
Fair Value, Inputs, Level 3 [Member]    
Investments, fair value 3,161,358 3,161,358
Publicly Traded Common Stock [Member]    
Investments, fair value 0 0
Publicly Traded Common Stock [Member] | Fair Value, Inputs, Level 1 [Member]    
Investments, fair value 0 0
Publicly Traded Common Stock [Member] | Fair Value, Inputs, Level 3 [Member]    
Investments, fair value 0 0
Publicly Traded Options [Member] | Fair Value, Inputs, Level 3 [Member]    
Investments, fair value 0 0
Publicly Traded Options [Member] | Fair Value, Inputs, Level 2 [Member]    
Investments, fair value 0 0
Private Company Common Stock [Member]    
Investments, fair value 2,961,358 2,961,358
Private Company Common Stock [Member] | Fair Value, Inputs, Level 1 [Member]    
Investments, fair value 0 0
Private Company Common Stock [Member] | Fair Value, Inputs, Level 3 [Member]    
Investments, fair value 2,961,358 2,961,358
Private Company Common Stock [Member] | Fair Value, Inputs, Level 2 [Member]    
Investments, fair value 0 0
Private Company Preferred Stock [Member]    
Investments, fair value 200,000 200,000
Private Company Preferred Stock [Member] | Fair Value, Inputs, Level 1 [Member]    
Investments, fair value 0 0
Private Company Preferred Stock [Member] | Fair Value, Inputs, Level 3 [Member]    
Investments, fair value 200,000 200,000
Private Company Preferred Stock [Member] | Fair Value, Inputs, Level 2 [Member]    
Investments, fair value $ 0 $ 0