Segment Information (Disaggregation Of Revenue By Type Of Service) (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2019	Nov. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue	$ 58,613	$ 53,829
Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	11,082	10,347
Services And Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	31,426	29,798
Services And Products [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	3,585	3,917
Subscriptions [Member]
Disaggregation of Revenue [Line Items]
Revenue	21,106	18,388
Subscriptions [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	6,818	5,713
Royalties [Member]
Disaggregation of Revenue [Line Items]
Revenue	4,761	4,309
Royalties [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	679	717
Leases And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,320	1,334
Operating Segments [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	45,832	42,148
Operating Segments [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	42,111	38,471
Operating Segments [Member] | International Licensees [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	3,721	3,677
Operating Segments [Member] | Services And Products [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	27,841	25,881
Operating Segments [Member] | Services And Products [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	27,251	25,009
Operating Segments [Member] | Services And Products [Member] | International Licensees [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	590	872
Operating Segments [Member] | Subscriptions [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	14,288	12,675
Operating Segments [Member] | Subscriptions [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	14,288	12,675
Operating Segments [Member] | Royalties [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	3,703	3,592
Operating Segments [Member] | Royalties [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	572	787
Operating Segments [Member] | Royalties [Member] | International Licensees [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	3,131	2,805
Corporate And Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,699	1,334
Corporate And Eliminations [Member] | Royalties [Member]
Disaggregation of Revenue [Line Items]
Revenue	379
Corporate And Eliminations [Member] | Leases And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 1,320	$ 1,334