Fair Value Of Financial Instruments (Schedule Of Contingent Consideration Liability) (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	May 31, 2020	Feb. 29, 2020	Nov. 30, 2019	May 31, 2019	May 31, 2020	May 31, 2019
Business Acquisition, Contingent Consideration [Line Items]
Contingent Liability at beginning	$ 4,227	$ 4,538	$ 5,229		$ 5,229
Change in fair value	(276)	(182)	91	$ 1,069	(367)	$ 1,145
Payments	(256)	(129)	(782)
Contingent Liability at ending	3,695	4,227	4,538		3,695
Jhana [Member]
Business Acquisition, Contingent Consideration [Line Items]
Contingent Liability at beginning	3,308	3,284	3,468		3,468
Change in fair value	(102)	153	98
Payments	(256)	(129)	(282)
Contingent Liability at ending	2,950	3,308	3,284		2,950
RGP [Member]
Business Acquisition, Contingent Consideration [Line Items]
Contingent Liability at beginning	919	1,254	1,761		1,761
Change in fair value	(174)	(335)	(7)
Payments			(500)
Contingent Liability at ending	$ 745	$ 919	$ 1,254		$ 745