Note 2 - Acquisitions - Components of Fair Value of Acquisitions and Allocation of Purchase Price For Acquisition of Piazza Rosa Group (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended				21 Months Ended
	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2019	Sep. 30, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2019
Payments to Acquire Businesses, Net of Cash Acquired, Total				$ 127,924		$ 10,397	$ 153,814
Goodwill, Ending Balance				281,503		$ 211,751		$ 281,503
Piazza Rosa Group [Member]
Total cash consideration	$ 10,056							10,056
Fair value of contingent consideration			$ 2,800		$ 2,600			2,617
Fair value of contingent consideration								2,617
Payments to Acquire Businesses, Net of Cash Acquired, Total	10,056	$ 900	10,100					12,673
Total								2,617
Other acquired assets	2,678		2,678	4,342				4,342
Other acquired assets								1,664
Inventories	637		637	635				635
Inventories								(2)
Property, plant, & equipment	5,005		5,005	5,563				5,563
Property, plant, & equipment								558
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total	4,087		4,087	3,472				3,472
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles			(600)					(615)
Goodwill, Ending Balance	6,218	$ 7,100	6,218	7,076	$ 7,100			7,076
Goodwill								858
Liabilities assumed	(7,387)		(7,387)	(7,387)				(7,387)
Liabilities assumed
Deferred taxes	$ (1,182)		$ (1,182)	$ (1,028)				(1,028)
Deferred taxes								$ 154