Segment Information (Disaggregation Of Revenue By Type Of Service) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 48,162	$ 53,745	$ 96,486	$ 112,357
Corporate And Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,517	2,188	3,004	3,887
Services And Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	20,231	25,004	41,898	56,430
Subscriptions [Member]
Disaggregation of Revenue [Line Items]
Revenue	22,863	21,364	44,552	42,471
Royalties [Member]
Disaggregation of Revenue [Line Items]
Revenue	3,924	6,124	7,740	10,883
Royalties [Member] | Corporate And Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	373	935	708	1,314
Leases And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,144	1,253	2,296	2,573
Leases And Other [Member] | Corporate And Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,144	1,253	2,296	2,573
Operating Segments [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	38,167	40,664	77,507	86,496
Operating Segments [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	8,478	10,893	15,975	21,974
Operating Segments [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	35,738	37,973	72,481	80,085
Operating Segments [Member] | International Licensees [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,429	2,691	5,026	6,411
Operating Segments [Member] | Services And Products [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	18,434	22,054	38,177	49,895
Operating Segments [Member] | Services And Products [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,797	2,950	3,721	6,535
Operating Segments [Member] | Services And Products [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	17,912	21,644	37,323	48,895
Operating Segments [Member] | Services And Products [Member] | International Licensees [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	522	410	854	1,000
Operating Segments [Member] | Subscriptions [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	17,132	15,172	33,747	29,461
Operating Segments [Member] | Subscriptions [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	5,731	6,192	10,805	13,010
Operating Segments [Member] | Subscriptions [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	17,132	15,172	33,747	29,461
Operating Segments [Member] | Royalties [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,601	3,438	5,583	7,140
Operating Segments [Member] | Royalties [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	950	1,751	1,449	2,429
Operating Segments [Member] | Royalties [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	694	1,157	1,411	1,729
Operating Segments [Member] | Royalties [Member] | International Licensees [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 1,907	$ 2,281	$ 4,172	$ 5,411