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Note 10 - Goodwill and Intangibles (Details Textual) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2022 USD ($) | Sep. 30, 2021 USD ($)
Goodwill, Impairment Loss | $ 0 | $ 0
Number of Patents Granted | 31 |
Impairment of Intangible Assets (Excluding Goodwill), Total | $ 0 | $ 0
Patents [Member] |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 20 years |

X
- Definition Represents the number of patents granted in the United States. + References No definition available. + Details
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