Note 4 - Fair Value Measurements and Other Liabilities - Schedule of Liabilities Under Fair Value Option (Details) - USD ($) |
Jun. 30, 2026 |
Mar. 31, 2026 |
Dec. 31, 2025 |
Jun. 30, 2025 |
Jun. 26, 2025 |
Jun. 18, 2025 |
Mar. 31, 2025 |
Feb. 04, 2025 |
|---|---|---|---|---|---|---|---|---|
| Token Rights | $ 5,331,380 | $ 5,345,712 | $ 5,345,712 | |||||
| Incremental Warrants [Member] | ||||||||
| Incremental Warrants | $ 0 | $ 0 | $ 90,560,000 | $ 81,360,000 | 100,800,000 | |||
| Convertible Note 2026 [Member] | ||||||||
| Convertible Note 2026 fair value | 14,927,000 | 14,573,000 | 15,056,000 | |||||
| Convertible Note 2026, contractual principal outstanding | 11,000,000 | 11,000,000 | 11,000,000 | |||||
| Convertible Note 2025 fair value | 14,927,000 | 14,573,000 | 15,056,000 | |||||
| Convertible Note 2025, contractual principal outstanding | $ 11,000,000 | $ 11,000,000 | 11,000,000 | |||||
| Convertible Note 2025 [Member] | ||||||||
| Convertible Note 2026 fair value | 5,818,000 | 7,297,000 | $ 12,477,000 | 15,295,000 | 33,000,000 | |||
| Convertible Note 2026, contractual principal outstanding | 5,500,000 | 5,500,000 | 5,500,000 | 5,500,000 | 5,500,000 | |||
| Convertible Note 2025 fair value | 5,818,000 | 7,297,000 | 12,477,000 | 15,295,000 | 33,000,000 | |||
| Convertible Note 2025, contractual principal outstanding | $ 5,500,000 | $ 5,500,000 | $ 5,500,000 | $ 5,500,000 | $ 5,500,000 |