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Note 11 - Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Sep. 30, 2024
Property, plant and equipment, gross $ 83,553 $ 81,606
Accumulated depreciation and impairment (60,309) (60,523)
Property, plant and equipment, net 23,244 21,083
Land and Land Improvements [Member]    
Property, plant and equipment, gross 2,960 4,869
Building and Building Improvements [Member]    
Property, plant and equipment, gross 24,089 21,312
Machinery and Equipment [Member]    
Property, plant and equipment, gross 48,647 49,860
Furniture and Fixtures [Member]    
Property, plant and equipment, gross 1,032 1,470
Tools, Dies and Molds [Member]    
Property, plant and equipment, gross 3,928 3,628
Construction in Progress [Member]    
Property, plant and equipment, gross 2,856 392
Transportation Equipment [Member]    
Property, plant and equipment, gross $ 41 $ 75