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Summary of Significant Accounting Policies - Schedule of Property, Plant and Equipment by Major Asset Class (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Sep. 30, 2023
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment $ 88,480 $ 93,836
Less: Accumulated depreciation 62,219 64,369
Property, plant and equipment, net 26,261 29,467
Land    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment 469 469
Buildings    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment 13,514 13,514
Machinery and equipment    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment $ 74,497 $ 79,853