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Segment Information (Long-Lived Assets By Countries) (Details) - USD ($)
$ in Thousands
Aug. 31, 2019
Aug. 31, 2018
Segment Reporting Information [Line Items]    
Long-lived assets $ 33,777 $ 37,109
United States/Canada [Member]    
Segment Reporting Information [Line Items]    
Long-lived assets 31,129 34,237
Japan [Member]    
Segment Reporting Information [Line Items]    
Long-lived assets 1,456 1,450
China [Member]    
Segment Reporting Information [Line Items]    
Long-lived assets 441 581
Singapore [Member]    
Segment Reporting Information [Line Items]    
Long-lived assets 370 315
United Kingdom [Member]    
Segment Reporting Information [Line Items]    
Long-lived assets 207 276
Australia [Member]    
Segment Reporting Information [Line Items]    
Long-lived assets 164 $ 250
Germany, Switzerland, And Austria [Member]    
Segment Reporting Information [Line Items]    
Long-lived assets $ 10