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Note 12 - Goodwill and Other Intangible Assets - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Sep. 30, 2024
--- | --- | ---
Goodwill, gross | $ 5,594 | $ 5,072
Goodwill, gross | 5,594 | 5,072
Goodwill, accumulated impairment losses | (4,336) | (4,336)
Goodwill, net | $ 1,258 | 736
Weighted average remaining useful life (Year) | 3 years 9 months 18 days |
Other intangible assets, gross | $ 12,107 | 8,383
Accumulated amortization | (6,952) | (6,734)
Finite-Lived Intangible Assets, Net | $ 5,155 | 1,649
Developed Technology Rights [Member] |  |
Weighted average remaining useful life (Year) | 6 years 1 month 6 days |
Other intangible assets, gross | $ 5,575 | 2,275
Customer Relationships [Member] |  |
Weighted average remaining useful life (Year) | 1 month 6 days |
Other intangible assets, gross | $ 3,955 | 3,900
Trade Names [Member] |  |
Weighted average remaining useful life (Year) | 8 months 12 days |
Other intangible assets, gross | $ 2,332 | 2,022
Noncompete Agreements [Member] |  |
Weighted average remaining useful life (Year) | 10 months 24 days |
Other intangible assets, gross | $ 245 | 186
Intelligent Industrial [Member] |  |
Goodwill, gross | 4,858 | 4,336
Goodwill, gross | 4,858 | 4,336
Goodwill, net | 500 |
Finite-Lived Intangible Assets, Net | 3,700 |
Smart Water [Member] |  |
Goodwill, gross | 736 | 736
Goodwill, gross | 736 | $ 736
Goodwill, net | 700 |
Finite-Lived Intangible Assets, Net | $ 400 |

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