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Nature Of Operations And Summary Of Significant Accounting Policies (Property And Equipment) (Details) - USD ($)
$ in Thousands
Aug. 31, 2022
Aug. 31, 2021
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 67,210 $ 70,839
Less accumulated depreciation (57,412) (59,314)
Property and equipment 9,798 11,525
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 30,059
Machinery And Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 543 915
Computer Hardware And Software [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 26,030 29,127
Furniture, Fixtures, And Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 9,287 $ 9,426