Note 2 - Digital Assets (Details Textual) - USD ($) |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Crypto Asset, Unrealized Gain, Nonoperating | $ 31,000 | $ 0 | $ 31,000 | $ 0 |
| Bittensor (TAO) [Member] | ||||
| Crypto Asset, Unrealized Gain, Nonoperating | $ 31,000 | $ 31,000 | ||