Segment Information (Reconciliation Of Adjusted EBITDA) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Feb. 28, 2021	Nov. 30, 2020	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Segment Reporting Information [Line Items]
Consolidated Adjusted EBITDA	$ 5,123		$ 4,056	$ 8,839	$ 9,017
Stock-based compensation	(1,599)		(1,793)	(2,757)	(3,644)
Increase (decrease) in the fair value of contingent consideration liabilities	16	$ (62)	182	(46)	91
Government COVID-19 assistance	27			234
Knowledge Capital wind-down costs					(389)
Gain from insurance settlement	150			150
Depreciation	(1,740)		(1,653)	(3,481)	(3,273)
Amortization	(1,133)		(1,170)	(2,265)	(2,340)
Income (loss) from operations	844		(378)	674	(538)
Interest income	16		13	40	18
Interest expense	(540)		(557)	(1,108)	(1,162)
Income (loss) before income taxes	320		(922)	(394)	(1,682)
Income tax benefit (provision)	(366)		2,019	(544)	2,235
Net income (loss)	(46)		1,097	(938)	553
Operating Segments [Member]
Segment Reporting Information [Line Items]
Consolidated Adjusted EBITDA	6,778		5,050	12,480	11,692
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Consolidated Adjusted EBITDA	$ (1,655)		$ (994)	$ (3,641)	$ (2,675)