Segment Information (Schedule Of Segment Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2018	Aug. 31, 2017	Aug. 31, 2016
Segment Reporting Information [Line Items]
Sales to external customers	$ 209,758	$ 185,256	$ 200,055
Gross profit	148,289	122,667	135,154
Adjusted EBITDA	11,878	7,699	26,894
Direct Offices [Member]
Segment Reporting Information [Line Items]
Sales to external customers	145,890	122,309	135,954
Gross profit	108,140	81,700	95,211
Adjusted EBITDA	15,773	4,242	20,610
Education Practice [Member]
Segment Reporting Information [Line Items]
Sales to external customers	45,272	44,122	40,844
Gross profit	28,654	27,916	24,513
Adjusted EBITDA	3,606	7,195	5,188
International Licensees [Member]
Segment Reporting Information [Line Items]
Sales to external customers	13,226	13,571	17,113
Gross profit	10,031	10,483	13,152
Adjusted EBITDA	5,087	6,415	9,268
Operating Segments [Member]
Segment Reporting Information [Line Items]
Sales to external customers	204,388	180,002	193,911
Gross profit	146,825	120,099	132,876
Adjusted EBITDA	24,466	17,852	35,066
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Sales to external customers	5,370	5,254	6,144
Gross profit	1,464	2,568	2,278
Adjusted EBITDA	$ (12,588)	$ (10,153)	$ (8,172)