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Note 5 - Intangible Assets - Changes in the Carrying Amount of Intangible Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Sep. 30, 2023
--- | --- | ---
Balance at end of period | $ 4,544 | $ 4,890
Domain And Trade Names [Member] |  |
Finite Lived Intangible Assets, gross | 615 | 629
Customer Relationships [Member] |  |
Finite Lived Intangible Assets, gross | 3,466 | 3,678
Technology-Based Intangible Assets [Member] |  |
Finite Lived Intangible Assets, gross | $ 463 | $ 583

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