Note 10 - Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Property, plant and equipment, gross	$ 81,606	$ 86,068
Accumulated depreciation and impairment	(60,523)	(62,020)
Property, plant and equipment, net	21,083	24,048
Land and Land Improvements [Member]
Property, plant and equipment, gross	4,869	7,069
Building and Building Improvements [Member]
Property, plant and equipment, gross	21,312	21,931
Machinery and Equipment [Member]
Property, plant and equipment, gross	49,860	48,877
Furniture and Fixtures [Member]
Property, plant and equipment, gross	1,470	1,487
Tools, Dies and Molds [Member]
Property, plant and equipment, gross	3,628	3,287
Construction in Progress [Member]
Property, plant and equipment, gross	392	3,343
Transportation Equipment [Member]
Property, plant and equipment, gross	$ 75	$ 74