v3.26.1
Note 4 - Fair Value Measurements and Other Liabilities - Liabilities Measured on Recurring Basis (Details) - USD ($)
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Jun. 30, 2025
Jun. 26, 2025
Mar. 31, 2025
Feb. 04, 2025
Convertible Note 2026 [Member]              
Debt Instrument, fair value $ 14,927,000 $ 14,573,000         $ 15,056,000
Convertible Note 2025 [Member]              
Debt Instrument, fair value     $ 5,818,000 $ 7,297,000 $ 12,477,000 $ 15,295,000 $ 33,000,000
Fair Value, Recurring [Member]              
Token Rights 5,331,380            
Fair Value, Recurring [Member] | Convertible Note 2026 [Member]              
Debt Instrument, fair value 14,927,000            
Fair Value, Recurring [Member] | Convertible Note 2025 [Member]              
Debt Instrument, fair value     5,818,000        
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]              
Token Rights 0            
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Convertible Note 2026 [Member]              
Debt Instrument, fair value 0            
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Convertible Note 2025 [Member]              
Debt Instrument, fair value     0        
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]              
Token Rights 5,331,380            
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Convertible Note 2026 [Member]              
Debt Instrument, fair value 0            
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Convertible Note 2025 [Member]              
Debt Instrument, fair value     0        
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]              
Token Rights 0            
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Convertible Note 2026 [Member]              
Debt Instrument, fair value $ 14,927,000            
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Convertible Note 2025 [Member]              
Debt Instrument, fair value     $ 5,818,000