Segment Information (Disaggregation Of Revenue By Type Of Service) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 29, 2020	Feb. 28, 2019	Feb. 29, 2020	Feb. 28, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 53,745	$ 50,356	$ 112,357	$ 104,185
Corporate And Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,188	1,338	3,887	2,673
Services And Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	25,004	26,202	56,430	56,001
Subscriptions [Member]
Disaggregation of Revenue [Line Items]
Revenue	21,364	17,784	42,471	36,171
Royalties [Member]
Disaggregation of Revenue [Line Items]
Revenue	6,124	5,032	10,883	9,340
Royalties [Member] | Corporate And Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	935		1,314
Leases And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,253	1,338	2,573	2,673
Leases And Other [Member] | Corporate And Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,253	1,338	2,573	2,673
Operating Segments [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	40,664	39,320	86,496	81,468
Operating Segments [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	10,893	9,698	21,974	20,044
Operating Segments [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	37,973	36,414	80,085	74,885
Operating Segments [Member] | International Licensees [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,691	2,906	6,411	6,583
Operating Segments [Member] | Services And Products [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	22,054	23,619	49,895	49,500
Operating Segments [Member] | Services And Products [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,950	2,583	6,535	6,501
Operating Segments [Member] | Services And Products [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	21,644	23,102	48,895	48,111
Operating Segments [Member] | Services And Products [Member] | International Licensees [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	410	517	1,000	1,389
Operating Segments [Member] | Subscriptions [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	15,172	12,416	29,461	25,091
Operating Segments [Member] | Subscriptions [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	6,192	5,368	13,010	11,080
Operating Segments [Member] | Subscriptions [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	15,172	12,416	29,461	25,091
Operating Segments [Member] | Royalties [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	3,438	3,285	7,140	6,877
Operating Segments [Member] | Royalties [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,751	1,747	2,429	2,463
Operating Segments [Member] | Royalties [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,157	896	1,729	1,683
Operating Segments [Member] | Royalties [Member] | International Licensees [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 2,281	$ 2,389	$ 5,411	$ 5,194