v3.26.1
Note 16 - Subsequent Events (Details Textual)
€ / shares in Units, $ / shares in Units, € in Millions
3 Months Ended 12 Months Ended
Apr. 28, 2026
USD ($)
$ / shares
Mar. 31, 2026
USD ($)
Mar. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
May 04, 2026
€ / shares
shares
Apr. 29, 2026
EUR (€)
€ / shares
Impairment of Discontinued Operations   $ 519,000 $ 0      
Debt Instrument, Face Amount   4,350,000        
Proceeds from Convertible Debt   4,350,000 2,000,000      
Subsequent Event [Member] | April 2026 Debenture [Member]            
Debt Instrument, Face Amount $ 700,000          
Debt Instrument, Interest Rate, Stated Percentage 12.00%          
Debt Instrument, Default Rate 18.00%          
Debt Instrument, Convertible, Conversion Price | $ / shares $ 18.75          
Debt Instrument, Convertible, Conversion Price, Variable, Percentage of VWAP 85.00%          
Proceeds from Convertible Debt $ 700,000          
Sono Motors GmbH [Member]            
Impairment of Discontinued Operations   $ 519,000 $ (0) $ (0)    
Sono Motors GmbH [Member] | Subsequent Event [Member]            
Investment Owned, Balance, Shares (in shares) | shares         33,588  
Ownership Percentage         100.00%  
Ownership Percentage Transferred         50.00%  
Ownership Shares, Price Per Share (in EUR per Share) | € / shares         € 1 € 1
Investment Owned, Balance, Principal Amount | €           € 10.5