Segment Information (Disaggregation Of Revenue By Type Of Service) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2020	May 31, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 37,105	$ 56,006	$ 149,463	$ 160,191
Corporate And Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,421	1,517	5,309	4,190
Services And Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	11,615	31,763	68,045	87,763
Subscriptions [Member]
Disaggregation of Revenue [Line Items]
Revenue	22,251	18,927	64,721	55,097
Royalties [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,152	3,799	13,037	13,141
Royalties [Member] | Corporate And Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	334		1,649
Leases And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,087	1,517	3,660	4,190
Leases And Other [Member] | Corporate And Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,087	1,517	3,660	4,190
Operating Segments [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	27,468	43,401	113,964	124,869
Operating Segments [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	8,216	11,088	30,190	31,132
Operating Segments [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	26,760	40,387	106,844	115,271
Operating Segments [Member] | International Licensees [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	708	3,014	7,120	9,598
Operating Segments [Member] | Services And Products [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	10,242	26,698	60,137	76,198
Operating Segments [Member] | Services And Products [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,373	5,065	7,908	11,565
Operating Segments [Member] | Services And Products [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	10,051	26,295	58,946	74,405
Operating Segments [Member] | Services And Products [Member] | International Licensees [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	191	403	1,191	1,793
Operating Segments [Member] | Subscriptions [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	15,965	13,363	45,425	38,453
Operating Segments [Member] | Subscriptions [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	6,286	5,564	19,296	16,644
Operating Segments [Member] | Subscriptions [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	15,965	13,363	45,425	38,453
Operating Segments [Member] | Royalties [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,261	3,340	8,402	10,218
Operating Segments [Member] | Royalties [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	557	459	2,986	2,923
Operating Segments [Member] | Royalties [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	744	729	2,473	2,413
Operating Segments [Member] | Royalties [Member] | International Licensees [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 517	$ 2,611	$ 5,929	$ 7,805