Note 18 - Divestitures (Details Textual) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended		12 Months Ended
	Feb. 28, 2023	Mar. 31, 2024	Sep. 30, 2023	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023	Jun. 30, 2023
Revenue from Contract with Customer, Including Assessed Tax		$ 177,267		$ 184,332	$ 540,441	$ 552,721
Proceeds from Divestiture of Businesses					7,774	67,023
Gain (Loss) on Disposition of Business		(0)		62,105	274	62,105
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		23,516		$ 32,262	$ 71,352	$ 101,243
Gain (Loss) on Disposition of Business			$ 300
Goodwill, Other Increase (Decrease)							$ (200)
Proceeds From Escrow Deposit		$ 7,500
Specialty Solutions Group [Member] | Procon Pumps Business [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 21,200