Fair Value Of Financial Instruments (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	May 31, 2019	Aug. 31, 2020	Jul. 11, 2017
Payment of contingent consideration		$ 1,297
Robert Gregory Partners [Member]
Payment of contingent consideration		500
Purchase price included contingent consideration		4,500
Increased contingent consideration liability	$ 1,100
Jhana Education [Member]
Payment of contingent consideration		797
Purchase price included contingent consideration			$ 7,200
Jhana Education [Member] | Accrued Liabilities [Member]
Payment of contingent consideration		$ 800