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Segment Information (Schedule Of Segment Operations) (Details) - USD ($)
$ in Thousands
12 Months Ended
Aug. 31, 2017
Aug. 31, 2016
Aug. 31, 2015
Segment Reporting Information [Line Items]      
Sales to external customers $ 185,256 $ 200,055 $ 209,941
Gross profit 122,667 135,154 138,089
Adjusted EBITDA 7,699 26,894 31,858
Direct Offices [Member]      
Segment Reporting Information [Line Items]      
Sales to external customers 96,662 103,605 113,087
Gross profit 65,950 74,632 81,057
Adjusted EBITDA 6,134 17,791 18,801
Strategic Markets [Member]      
Segment Reporting Information [Line Items]      
Sales to external customers 22,974 29,819 37,039
Gross profit 13,601 18,791 21,680
Adjusted EBITDA (2,005) 3,559 8,418
Education Practice [Member]      
Segment Reporting Information [Line Items]      
Sales to external customers 44,122 40,844 33,681
Gross profit 27,916 24,513 19,350
Adjusted EBITDA 6,043 4,787 3,084
International Licensees [Member]      
Segment Reporting Information [Line Items]      
Sales to external customers 13,571 17,113 16,547
Gross profit 10,483 13,152 12,343
Adjusted EBITDA 6,005 8,646 6,645
Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Sales to external customers 177,329 191,381 200,354
Gross profit 117,950 131,088 134,430
Adjusted EBITDA 16,177 34,783 36,948
Corporate And Eliminations [Member]      
Segment Reporting Information [Line Items]      
Sales to external customers 7,927 8,674 9,587
Gross profit 4,717 4,066 3,659
Adjusted EBITDA $ (8,478) $ (7,889) $ (5,090)