Segment Information (Disaggregation Of Revenue By Type Of Service) (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2018	Nov. 30, 2017
Disaggregation of Revenue [Line Items]
Revenue	$ 53,829	$ 47,932
Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	10,347	9,176
Services And Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	29,798	30,150
Services And Products [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	3,917	4,786
Subscriptions [Member]
Disaggregation of Revenue [Line Items]
Revenue	18,388	12,850
Subscriptions [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	5,713	3,733
Royalties [Member]
Disaggregation of Revenue [Line Items]
Revenue	4,309	3,693
Royalties [Member] | Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	717	657
Leases And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,334	1,239
Operating Segments [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	42,148	37,517
Operating Segments [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	38,471	34,197
Operating Segments [Member] | International Licensees [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	3,677	3,320
Operating Segments [Member] | Services And Products [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	25,881	25,364
Operating Segments [Member] | Services And Products [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	25,009	24,873
Operating Segments [Member] | Services And Products [Member] | International Licensees [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	872	491
Operating Segments [Member] | Subscriptions [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	12,675	9,117
Operating Segments [Member] | Subscriptions [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	12,675	9,117
Operating Segments [Member] | Royalties [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	3,592	3,036
Operating Segments [Member] | Royalties [Member] | Direct Offices [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	787	207
Operating Segments [Member] | Royalties [Member] | International Licensees [Member] | Enterprise Division [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,805	2,829
Corporate And Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,334	1,239
Corporate And Eliminations [Member] | Leases And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 1,334	$ 1,239