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Fair Value Of Financial Instruments (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
May 31, 2019
May 31, 2018
May 31, 2019
May 31, 2018
Aug. 31, 2018
Change in fair value of contingent consideration liabilities $ 1,069 $ 136 $ 1,145 $ 789  
Contingent consideration 5,210   5,210   $ 4,548
Jhana Education [Member]          
Change in fair value of contingent consideration liabilities     49    
Contingent consideration 3,508   3,508   3,942
Jhana Education [Member] | Accrued Liabilities [Member]          
Contingent consideration 900   900    
Robert Gregory Partners [Member]          
Change in fair value of contingent consideration liabilities 1,100   1,096    
Contingent consideration 1,702   1,702   $ 606
Robert Gregory Partners [Member] | Accrued Liabilities [Member]          
Contingent consideration $ 500   $ 500