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Income Taxes (Narrative) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2022
Aug. 31, 2021
Aug. 31, 2020
Aug. 31, 2019
Income Taxes [Line Items]        
Benefit (provision) for income taxes $ (3,634) $ 7,548 $ (10,231)  
Income before income taxes 22,064 $ 6,075 $ 796  
Effective income tax benefit rate   124.20%    
Tax expense for non-deductible executive compensation $ 1,200      
Income tax rate 16.50% (124.20%) 1283.70%  
Effective tax rate 21.00% 21.00% 21.00%  
Additional tax expense from increase in valuation allowance against deferred income tax assets     $ 11,300  
GILTI tax expense   $ 0 0 $ 300
GILTI tax benefit   300    
Operating loss carryforwards $ 38,114      
Reduced the valuation allowance by 2,845 10,546 (11,261)  
Total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate 1,300 1,300    
Increase (decrease) in income tax expense due to interest and penalties related to uncertain tax positions 100      
Unrecognized tax benefits 1,597 1,594 $ 1,640 $ 1,895
Balance of interest and penalties related to uncertain tax positions 300 200    
Stock-Based Compensation Deductions [Member]        
Income Taxes [Line Items]        
Benefit (provision) for income taxes 600      
United States – State And Local Income Tax [Member]        
Income Taxes [Line Items]        
Operating loss carryforwards $ 1,600      
Foreign Tax Authority [Member]        
Income Taxes [Line Items]        
Operating loss carryforwards   $ 800