Condensed Consolidated Statements Of Changes In Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Treasury Stock [Member]	Total
Beginning balance, shares at Aug. 31, 2019	27,056
Beginning balance at Aug. 31, 2019	$ 1,353	$ 215,964	$ 59,403	$ 269
Beginning balance, shares, Treasury at Aug. 31, 2019					(13,087)
Beginning balance, Treasury at Aug. 31, 2019					$ (194,975)
Issuance of common stock from treasury, shares					9
Issuance of common stock from treasury		131			$ 123
Purchase of treasury shares					$ (3)
Stock-based compensation		1,851
Cumulative translation adjustments				(37)		$ (37)
Net loss			(544)			(544)
Ending balance, shares at Nov. 30, 2019	27,056
Ending balance at Nov. 30, 2019	$ 1,353	217,946	58,859	232
Ending balance, shares, Treasury at Nov. 30, 2019					(13,078)
Ending balance, Treasury at Nov. 30, 2019					$ (194,855)
Beginning balance, shares at Aug. 31, 2020	27,056
Beginning balance at Aug. 31, 2020	$ 1,353	211,920	49,968	641		59,453
Beginning balance, shares, Treasury at Aug. 31, 2020					(13,175)
Beginning balance, Treasury at Aug. 31, 2020					$ (204,429)
Issuance of common stock from treasury, shares					236
Issuance of common stock from treasury		(3,411)			$ 3,668
Purchase of treasury shares, shares					(89)
Purchase of treasury shares					$ (1,530)
Stock-based compensation		1,158
Cumulative translation adjustments				307		307
Net loss			(892)			(892)
Ending balance, shares at Nov. 30, 2020	27,056
Ending balance at Nov. 30, 2020	$ 1,353	$ 209,667	$ 49,076	$ 948		$ 58,753
Ending balance, shares, Treasury at Nov. 30, 2020					(13,028)
Ending balance, Treasury at Nov. 30, 2020					$ (202,291)