Condensed Consolidated Statements Of Changes In Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Total
Beginning balance, shares at Aug. 31, 2022	27,056,000
Beginning balance at Aug. 31, 2022	$ 1,353	$ 220,246	$ 82,021	$ (542)
Beginning balance, shares, Treasury at Aug. 31, 2022					(13,203,000)
Beginning balance, Treasury at Aug. 31, 2022					$ (220,264)
Issuance of common stock from treasury, shares					56,000
Issuance of common stock from treasury		(568)			$ 935
Purchases of common shares for treasury, shares					(18,000)
Purchases of common shares for treasury					$ (835)
Stock-based compensation		2,735
Cumulative translation adjustments				(130)		$ (130)
Net income			4,667			4,667
Ending balance, shares at Nov. 30, 2022	27,056,000
Ending balance at Nov. 30, 2022	$ 1,353	222,413	86,688	(672)
Ending balance, shares, Treasury at Nov. 30, 2022					(13,165,000)
Ending balance, Treasury at Nov. 30, 2022					$ (220,164)
Beginning balance, shares at Aug. 31, 2023	27,056,000
Beginning balance at Aug. 31, 2023	$ 1,353	232,373	99,802	(987)		$ 78,654
Beginning balance, shares, Treasury at Aug. 31, 2023					(13,974,000)	(13,974,000)
Beginning balance, Treasury at Aug. 31, 2023					$ (253,887)
Issuance of common stock from treasury, shares					601,000	600,717
Issuance of common stock from treasury		(10,569)			$ 10,925
Purchases of common shares for treasury, shares					(409,000)	(409,000)
Purchases of common shares for treasury					$ (16,308)	$ (16,308)
Stock-based compensation		2,897
Cumulative translation adjustments				51		51
Net income			4,851			4,851
Ending balance, shares at Nov. 30, 2023	27,056,000
Ending balance at Nov. 30, 2023	$ 1,353	$ 224,701	$ 104,653	$ (936)		$ 70,501
Ending balance, shares, Treasury at Nov. 30, 2023					(13,782,000)	(13,782,000)
Ending balance, Treasury at Nov. 30, 2023					$ (259,270)