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Note 5 - Digital Assets (Details Textual) |  | 3 Months Ended |
--- | --- | --- | ---
Jan. 16, 2026 USD ($) $ / shares | Mar. 31, 2026 USD ($) | Mar. 31, 2025 USD ($) | Dec. 31, 2025 USD ($)
Crypto Asset, Number of Units |  | 2,153,141,678 |  | 0
Crypto Asset, Unrealized Gain, Operating |  | $ 22,674,000 | $ 0 |
Crypto Asset, Number of Units Received From Equity Issuance |  | 943,599,689 |  |
Crypto Asset, Received From Equity Issuance |  | $ 58,031 |  |
Crypto Asset, Fair Value |  | $ 160,086 |  | $ 0
Crypto Asset, Number of Units Received As Rewards |  | 35,386,649 |  |
Crypto Asset, Recevied As Rewards |  | $ 2,463 |  |
SKY Tokens [Member] |  |  |  |
Crypto Asset, Number of Units |  | 2,153,141,678 |  |
Crypto Asset, Unrealized Gain, Operating |  | $ 22,700,000 |  |
Crypto Asset, Fair Value |  | $ 160,086,000 |  |
January 2026 SKY Tokens [Member] |  |  |  |
Crypto Asset, Number of Units Received From Equity Issuance | 943,599,689 |  |  |
Crypto Asset, Received From Equity Issuance | $ 58,000,000 |  |  |
Crypto Asset, Per Token Price | $ / shares | $ 0.0615 |  |  |
Crypto Asset, Fair Value | $ 58,000,000 |  |  |
Stablecoins [Member] |  |  |  |
Crypto Asset, Fair Value | $ 51,000,000 |  |  |
Staking Award SKY Tokens [Member] |  |  |  |
Crypto Asset, Number of Units |  | 2,153,141,678 |  |
Crypto Asset, Number of Units Received As Rewards |  | 35,386,649 |  |
Crypto Asset, Recevied As Rewards |  | $ 2,500,000 |  |

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