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Note 2 - Summary of Significant Accounting Policies - Summary of Level 3 Liabilities (Details) - USD ($) $ in Thousands | 6 Months Ended | 18 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2025
Change in fair value | $ 1,100 |
Dissenting Shares [Member] |  |
Balance of Dissenting Shareholders' Liability as of April 1, 2024 |  | $ 0
Initial value upon re-domestication |  | 4,526
Change in fair value |  | 1,103
Cash settlement of dissenting shareholders' liability |  | (5,629)
Balance of Dissenting Shareholders' Liability as of September 30, 2025 | $ 0 | $ 0

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