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Nature Of Operations And Summary Of Significant Accounting Policies (Property And Equipment) (Details) - USD ($)
$ in Thousands
Aug. 31, 2023
Aug. 31, 2022
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 70,940 $ 67,210
Less accumulated depreciation (60,901) (57,412)
Property and equipment 10,039 9,798
Land And Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 1,312 1,312
Buildings [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 30,038 30,038
Machinery And Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 495 543
Computer Hardware And Software [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 28,948 26,030
Furniture, Fixtures, And Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 10,147 $ 9,287