Segment Information (Reconciliation Of Adjusted EBITDA) (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2021	Nov. 30, 2020
Segment Reporting Information [Line Items]
Consolidated Adjusted EBITDA	$ 9,932	$ 3,716
Stock-based compensation	(1,649)	(1,158)
Reduction (increase) in contingent consideration liabilities	(28)	(62)
Government COVID-19 assistance		207
Depreciation	(1,279)	(1,741)
Amortization	(1,431)	(1,131)
Income (loss) from operations	5,545	(169)
Interest income	15	24
Interest expense	(446)	(568)
Income (loss) before income taxes	5,114	(713)
Income tax provision	(1,302)	(179)
Net income (loss)	3,812	(892)
Operating Segments [Member]
Segment Reporting Information [Line Items]
Consolidated Adjusted EBITDA	11,860	5,702
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Consolidated Adjusted EBITDA	(1,928)	(1,986)
Corporate [Member]
Segment Reporting Information [Line Items]
Consolidated Adjusted EBITDA	$ (1,928)	$ (1,986)