Segment Information (Reconciliation Of Adjusted EBITDA) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2022	May 31, 2021
Segment Reporting Information [Line Items]
Consolidated Adjusted EBITDA	$ 10,876	$ 8,563	$ 28,850	$ 17,402
Stock-based compensation	(2,369)	(2,370)	(5,987)	(5,127)
Increase in the fair value of contingent consideration liabilities	(12)	(118)	(60)	(164)
Business acquisition costs		(300)		(300)
Government COVID-19 assistance				234
Gain from insurance settlement				150
Depreciation	(1,217)	(1,423)	(3,686)	(4,904)
Amortization	(1,329)	(1,238)	(4,106)	(3,503)
Income from operations	5,949	3,114	15,011	3,788
Interest income	21	16	48	56
Interest expense	(405)	(525)	(1,274)	(1,633)
Income before income taxes	5,565	2,605	13,785	2,211
Income tax benefit (provision)	1,597	10,149	(933)	9,605
Net income	7,162	12,754	12,852	11,816
Operating Segments [Member]
Segment Reporting Information [Line Items]
Consolidated Adjusted EBITDA	13,168	10,847	34,880	23,327
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Consolidated Adjusted EBITDA	(2,292)	(2,284)	(6,030)	(5,925)
Corporate [Member]
Segment Reporting Information [Line Items]
Consolidated Adjusted EBITDA	$ (2,292)	$ (2,284)	$ (6,030)	$ (5,925)