Segment Information (Disaggregation Of Revenue By Type Of Service) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2019	Feb. 28, 2018
Disaggregation of Revenue [Line Items]
Revenue	$ 50,356	$ 46,547	$ 104,185	$ 94,479
Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	9,698	9,007
Services And Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	26,202	26,072	56,001	56,221
Services And Products [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,583	3,396
Subscriptions [Member]
Disaggregation of Revenue [Line Items]
Revenue	17,784	13,731	36,171	26,581
Subscriptions [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	5,368	3,749
Royalties [Member]
Disaggregation of Revenue [Line Items]
Revenue	5,032	5,525	9,340	9,218
Royalties [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,747	1,862
Leases And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,338	1,219	2,673	2,459
Operating Segments [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	39,320	36,321	81,468	73,837
Operating Segments [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue			20,044	18,183
Operating Segments [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	36,414	33,275	74,885	67,471
Operating Segments [Member] | International Licensees [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,906	3,046	6,583	6,366
Operating Segments [Member] | Services And Products [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	23,619	22,676	49,500	48,040
Operating Segments [Member] | Services And Products [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue			6,501	8,181
Operating Segments [Member] | Services And Products [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	23,102	22,108	48,111	46,981
Operating Segments [Member] | Services And Products [Member] | International Licensees [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	517	568	1,389	1,059
Operating Segments [Member] | Subscriptions [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	12,416	9,982	25,091	19,099
Operating Segments [Member] | Subscriptions [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue			11,080	7,482
Operating Segments [Member] | Subscriptions [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	12,416	9,982	25,091	19,099
Operating Segments [Member] | Royalties [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	3,285	3,663	6,877	6,698
Operating Segments [Member] | Royalties [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue			2,463	2,520
Operating Segments [Member] | Royalties [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	896	1,185	1,683	1,391
Operating Segments [Member] | Royalties [Member] | International Licensees [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,389	2,478	5,194	5,307
Corporate And Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,338	1,219	2,673	2,459
Corporate And Eliminations [Member] | Leases And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 1,338	$ 1,219	$ 2,673	$ 2,459