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Segment Information (Consolidated Revenues From Continuing Operations By Country) (Details) - USD ($)
$ in Thousands
12 Months Ended
Aug. 31, 2017
Aug. 31, 2016
Aug. 31, 2015
Segment Reporting Information [Line Items]      
Sales $ 185,256 $ 200,055 $ 209,941
United States [Member]      
Segment Reporting Information [Line Items]      
Sales 137,219 155,153 162,594
Japan [Member]      
Segment Reporting Information [Line Items]      
Sales 14,482 14,997 14,446
China [Member]      
Segment Reporting Information [Line Items]      
Sales 11,552 3,884 2,424
United Kingdom [Member]      
Segment Reporting Information [Line Items]      
Sales 4,754 7,716 8,997
Canada [Member]      
Segment Reporting Information [Line Items]      
Sales 4,372 4,357 6,460
Australia [Member]      
Segment Reporting Information [Line Items]      
Sales 2,704 3,404 3,774
Western Europe [Member]      
Segment Reporting Information [Line Items]      
Sales 1,679 1,503 1,364
Thailand [Member]      
Segment Reporting Information [Line Items]      
Sales 1,147 1,226 1,055
Denmark/Scandinavia [Member]      
Segment Reporting Information [Line Items]      
Sales 775 863 729
Mexico/Central America [Member]      
Segment Reporting Information [Line Items]      
Sales 751 917 974
Middle East [Member]      
Segment Reporting Information [Line Items]      
Sales 723 584 670
Singapore [Member]      
Segment Reporting Information [Line Items]      
Sales 722 1,143 1,397
India [Member]      
Segment Reporting Information [Line Items]      
Sales 701 677 708
Central/Eastern Europe [Member]      
Segment Reporting Information [Line Items]      
Sales 638 644 492
Indonesia [Member]      
Segment Reporting Information [Line Items]      
Sales 614 579 651
Brazil [Member]      
Segment Reporting Information [Line Items]      
Sales 410 319 321
Malaysia [Member]      
Segment Reporting Information [Line Items]      
Sales 364 384 511
Philippines [Member]      
Segment Reporting Information [Line Items]      
Sales 324 332 327
Others [Member]      
Segment Reporting Information [Line Items]      
Sales $ 1,325 $ 1,373 $ 2,047