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
	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Jun. 30, 2018
Total		$ 96,828	$ 10,397
Goodwill		263,021		$ 263,021	$ 211,751
Piazza Rosa Group [Member]
Total cash consideration	$ 10,056			10,056
Fair value of contingent consideration			2,800	2,617
Fair value of contingent consideration				2,617
Total	10,056	900	10,100	12,673
Total				2,617
Other acquired assets	2,678	4,342	2,678	4,342
Other acquired assets				1,664
Inventories	637	635	637	635
Inventories				(2)
Property, plant, and equipment	5,005	5,563	5,005	5,563
Property, plant, and equipment				558
Identifiable intangible assets	4,087	3,472	4,087	3,472
Identifiable intangible assets				(615)
Goodwill	6,218	7,076	6,218	7,076
Goodwill		900		858
Liabilities assumed	(7,387)	(7,387)	(7,387)	(7,387)
Liabilities assumed
Deferred taxes	(1,182)	(1,028)	(1,182)	(1,028)
Deferred taxes				154
Total	$ 10,056	$ 12,673	$ 10,056	12,673
Total				$ 2,617