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Note 18 - Divestitures (Details Textual) - USD ($) $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 28, 2023 | Sep. 30, 2023 | Sep. 30, 2022 | Jun. 30, 2023
Revenue from Contract with Customer, Including Assessed Tax |  | $ 184,774 | $ 180,600 |
Proceeds from Divestiture of Businesses |  | 274 | 0 |
Gain (Loss) on Disposition of Business |  | 274 | (0) |
Goodwill, Other Increase (Decrease) |  | 13,889 |  |
Procon Pumps Business [Member] | Discontinued Operations, Disposed of by Sale [Member] |  |  |  |
Proceeds from Divestiture of Businesses |  |  |  | $ 67,000
Gain (Loss) on Disposition of Business |  |  |  | 62,100
Specialty Solutions Group [Member] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  | 25,879 | $ 34,922 |
Gain (Loss) on Disposition of Business |  | 300 |  |
Goodwill, Other Increase (Decrease) |  | $ 0 |  | $ (200)
Specialty Solutions Group [Member] | Procon Pumps Business [Member] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | $ 21,200 |  |  |

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