Note 15 - Income Taxes (Detail) - Provision For Income Taxes: (USD $)	3 Months Ended									12 Months Ended
	Aug. 31, 2012	May 31, 2012	Feb. 29, 2012	Nov. 30, 2011	Aug. 31, 2011		May 31, 2011	Feb. 28, 2011	Nov. 30, 2010	Aug. 31, 2012	Aug. 31, 2011
Current:
State										$ 25,000	$ 40,000
Foreign										1,015,000	344,000
										1,040,000	384,000
Deferred:
Federal										44,000	303,000
State										(43,000)	19,000
										1,000	322,000
	$ (32,000)	$ 814,000	$ 100,000	$ 106,000	$ 216,000	[1]	$ 228,000	$ 140,000	$ 122,000	$ 1,041,000	$ 706,000

[1] During the fourth quarter of fiscal 2010, the Company decided to consolidate the financial results of the Company's majority owned Brazilian subsidiary, Zerust Prevencao de Corrosao S.A., for the fiscal year ended August 31, 2010. As a result, all revenues and expenses of Zerust Brazil for the fiscal year ended August 31, 2010 are included in the fourth quarter of fiscal 2010.