Segment Information (Disaggregation Of Revenue By Type Of Service) (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2020	Nov. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 48,324	$ 58,613
Corporate And Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,487	1,699
Services And Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	21,667	31,426
Subscriptions [Member]
Disaggregation of Revenue [Line Items]
Revenue	21,689	21,106
Royalties [Member]
Disaggregation of Revenue [Line Items]
Revenue	3,816	4,761
Royalties [Member] | Corporate And Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	335	379
Leases And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,152	1,320
Leases And Other [Member] | Corporate And Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,152	1,320
Operating Segments [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	39,339	45,832
Operating Segments [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	7,498	11,082
Operating Segments [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	36,743	42,111
Operating Segments [Member] | International Licensees [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,596	3,721
Operating Segments [Member] | Services And Products [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	19,743	27,841
Operating Segments [Member] | Services And Products [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,924	3,585
Operating Segments [Member] | Services And Products [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	19,412	27,251
Operating Segments [Member] | Services And Products [Member] | International Licensees [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	331	590
Operating Segments [Member] | Subscriptions [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	16,614	14,288
Operating Segments [Member] | Subscriptions [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	5,075	6,818
Operating Segments [Member] | Subscriptions [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	16,614	14,288
Operating Segments [Member] | Royalties [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,982	3,703
Operating Segments [Member] | Royalties [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	499	679
Operating Segments [Member] | Royalties [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	717	572
Operating Segments [Member] | Royalties [Member] | International Licensees [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 2,265	$ 3,131