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Note 12 - Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Sep. 30, 2025
Notes Tables |
Schedule of Intangible Assets and Goodwill [Table Text Block] |
|  | Weighted-Average Remaining Useful Lives (in years) |  |  | AS OF SEPTEMBER 30, |
|  |  |  |  | 2025 |  |  | 2024 |
Goodwill: |  |  |  |  |  |  |  |  |  |  |
Intelligent Industrial |  |  |  |  | $ | 4,858 |  |  | $ | 4,336 |
Smart Water |  |  |  |  |  | 736 |  |  |  | 736 |
Total goodwill |  |  |  |  |  | 5,594 |  |  |  | 5,072 |
Accumulated impairment losses |  |  |  |  |  | (4,336 | ) |  |  | (4,336 | )
|  |  |  |  | $ | 1,258 |  |  | $ | 736 |
Other intangible assets: |  |  |  |  |  |  |  |  |  |  |
Developed technology |  | 6.1 |  |  | $ | 5,575 |  |  | $ | 2,275 |
Customer relationships |  | 0.1 |  |  |  | 3,955 |  |  |  | 3,900 |
Trade names |  | 0.7 |  |  |  | 2,332 |  |  |  | 2,022 |
Non-compete agreements |  | 0.9 |  |  |  | 245 |  |  |  | 186 |
Total other intangible assets |  | 3.8 |  |  |  | 12,107 |  |  |  | 8,383 |
Accumulated amortization |  |  |  |  |  | (6,952 | ) |  |  | (6,734 | )
|  |  |  |  | $ | 5,155 |  |  | $ | 1,649 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
2026 |  |  | 561 |
2027 |  |  | 547 |
2028 |  |  | 547 |
2029 |  |  | 542 |
2030 |  |  | 508 |
Thereafter |  |  | 2,450 |
|  | $ | 5,155 |

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