Note 7 - Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Sep. 30, 2022
Accumulated depreciation and impairment	$ (62,481)	$ (70,330)
Property, Plant and Equipment, Net	21,919	26,598
Land and Land Improvements [Member]
Property, Plant and Equipment, Gross	7,291	7,855
Building and Building Improvements [Member]
Property, Plant and Equipment, Gross	22,080	24,588
Machinery and Equipment [Member]
Property, Plant and Equipment, Gross	49,588	59,393
Furniture and Fixtures [Member]
Property, Plant and Equipment, Gross	1,495	1,434
Tools, Dies and Molds [Member]
Property, Plant and Equipment, Gross	3,362	3,243
Construction in Progress [Member]
Property, Plant and Equipment, Gross	509	341
Transportation Equipment [Member]
Property, Plant and Equipment, Gross	$ 75	$ 74