Consolidated Statements Of Shareholders' Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid-in Capital [Member]	Common Stock Warrants [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Treasury Stock [Member]	Total
Beginning balance at Aug. 31, 2011	$ 1,353	$ 179,515	$ 5,260	$ 18,269	$ 3,592	$ (128,673)
Beginning balance, shares at Aug. 31, 2011	27,056,000					(9,386,000)
Issuance of common stock from treasury, shares						60,000
Issuance of common stock from treasury		(358)				800
Purchase of treasury shares, shares						(44,000)
Purchase of treasury shares						(440)
Unvested share award, shares						37,000
Unvested share award		(514)				514
Share-based compensation		3,835
Management stock loan activity, shares						(32,000)
Management stock loan activity		313				(313)
Repurchases of share-based award		(249)
Cumulative translation adjustments					(182)		(182)
Other		(8)
Net income				7,841			7,841
Ending balance at Aug. 31, 2012	1,353	182,534	5,260	26,110	3,410	(128,112)
Ending balance, shares at Aug. 31, 2012	27,056,000					(9,365,000)
Issuance of common stock from treasury, shares						279,000
Issuance of common stock from treasury		(3,341)				3,836
Purchase of treasury shares, shares						(113,000)
Purchase of treasury shares						(1,309)
Unvested share award, shares						31,000
Unvested share award		(421)				421
Share-based compensation		3,457
Warrant activity, shares						1,708,000
Warrant activity		(18,273)	(5,260)			23,478
Management stock loan activity, shares						(3,302,000)
Management stock loan activity		45,379				(45,514)
Cumulative translation adjustments					(1,724)		(1,724)
Tax benefits recorded in paid-in capital		903
Other, shares						3,000
Other		(11)				11
Net income				14,319			14,319
Ending balance at Aug. 31, 2013	1,353	210,227		40,429	1,686	(147,189)	106,506
Ending balance, shares at Aug. 31, 2013	27,056,000					(10,759,000)
Issuance of common stock from treasury, shares						698,000	698,000
Issuance of common stock from treasury		(9,010)				9,624
Purchase of treasury shares, shares						(222,000)	(73,320)
Purchase of treasury shares						(4,381)	(800)
Unvested share award, shares						15,000
Unvested share award		(202)				202
Share-based compensation		3,666
Cumulative translation adjustments					(235)		(235)
Tax benefits recorded in paid-in capital		2,477
Other, shares						2,000
Other		(10)				10
Net income				18,067			18,067
Ending balance at Aug. 31, 2014	$ 1,353	$ 207,148		$ 58,496	$ 1,451	$ (141,734)	$ 126,714
Ending balance, shares at Aug. 31, 2014	27,056,000					(10,266,000)