v3.26.1
Note 3 - Digital Assets (Details Textual)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Crypto Asset, Unrealized Gain (Loss), Nonoperating $ (2,295,000) $ 31,000 $ (97,000) $ 31,000 $ (3,519,000)  
Crypto Asset, Fair Value 4,709,000   4,709,000      
Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization 248,000 364,000 485,000 737,000    
Gross Profit 274,000 228,000 744,000 477,000    
Proceeds from Disposal, Crypto Asset     1,172,000 0    
Crypto Asset, Realized Gain (Loss), Nonoperating (166,000) 0 (114,000) 0    
Digital Assets [Member]            
Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization 6,000 $ 0 12,000 $ 0    
Gross Profit $ 99,000   $ 179,000      
Gross Profit, Percentage 94.00%   94.00%      
Bittensor (TAO) [Member]            
Percentage of Treasury Invested in Crypto Assets 69.00%   69.00%   66.00%  
Crypto Asset, Unrealized Gain (Loss), Nonoperating $ (2,295,000)   $ (97,000)      
Crypto Asset, Number of Units 23,335.18   23,335.18   24,665.44 0
Crypto Asset, Fair Value $ 4,709,000   $ 4,709,000   $ 5,395,000 $ 0
Crypto Asset, Units Purchased 1,900   1,900   24,127.62  
Crypto Asset, Purchase $ 506,000   $ 506,000   $ 8,736,000  
Crypto Asset, Units Sold 2,502.23   3,959.23      
Proceeds from Disposal, Crypto Asset $ 650,000   $ 1,172,000      
Crypto Asset, Realized Gain (Loss), Nonoperating $ (166,000)   $ (114,000)