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, 2012	$ 1,353	$ 182,534	$ 5,260	$ 26,110	$ 3,410	$ (128,112)	$ 90,555
Beginning balance, shares at Aug. 31, 2012	27,056,000					(9,365,000)
Issuance of common stock from treasury, shares						216,000
Issuance of common stock from treasury		(2,869)				2,973
Purchase of treasury shares, shares						(103,000)
Purchase of treasury shares						(1,176)
Exercise of common stock warrants, shares						345,000
Exercise of common stock warrants		(3,493)	(1,225)			4,751
Share-based compensation		473
Cumulative translation adjustments					(258)		(258)
Other, shares						1,000
Other		(3)				3
Net income				2,897			2,897
Ending balance at Dec. 01, 2012	$ 1,353	$ 176,642	$ 4,035	$ 29,007	$ 3,152	$ (121,561)	$ 92,628
Ending balance, shares at Dec. 01, 2012	27,056,000					(8,906,000)