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Note 3 - Revenue Recognition - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Trade receivables, included in accounts receivable* | [1] | $ 7,643 | $ 14,991 | $ 15,897
Contract assets, included in accounts receivable |  | 231 | 222 | 1,128
Contract liabilities, included in deferred revenue - short-term |  | 788 | 697 | 3,656
Contract liabilities, included in deferred revenue - long-term |  | $ 3,156 | $ 3,293 | $ 9,318
[1] | Exclusive of blenders' tax credit of $0, $6,683, and $11,381, respectively, and net of allowances for expected credit losses of $44, $29, and $55, respectively, as of the dates noted.

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