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Note 2 - Summary of Significant Accounting Policies - Accounts Receivable (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Accounts receivable | $ 41,587 | $ 25,177 |
Less allowance for credit losses | (238) | (411) | $ (1,461)
Accounts Receivable, net | 41,349 | 24,766 |
Trade Accounts Receivable [Member] |  |  |
Accounts receivable | 25,756 | 12,059 |
Unbilled [Member] |  |  |
Accounts receivable | 13,029 | 9,284 |
Non-Trade [Member] |  |  |
Accounts receivable | $ 2,802 | $ 3,834 |

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