Segment Information (Reconciliation Of Adjusted EBITDA) (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2020	Nov. 30, 2019
Segment Reporting Information [Line Items]
Consolidated Adjusted EBITDA	$ 3,716	$ 4,961
Stock-based compensation	(1,158)	(1,851)
Increase in the fair value of contingent consideration liabilities	(62)	(91)
Government COVID-19 assistance	207
Knowledge Capital wind-down costs		(389)
Depreciation	(1,741)	(1,619)
Amortization	(1,131)	(1,170)
Loss from operations	(169)	(159)
Interest income	24	5
Interest expense	(568)	(606)
Loss before income taxes	(713)	(760)
Income tax benefit (provision)	(179)	216
Net loss	(892)	(544)
Operating Segments [Member]
Segment Reporting Information [Line Items]
Consolidated Adjusted EBITDA	5,702	6,643
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Consolidated Adjusted EBITDA	$ (1,986)	$ (1,682)