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Note 7 - China Operations (Details) - Investment in Tianjin Zerust - Tianjin Zerust [Member] - USD ($)	9 Months Ended
	May. 31, 2015	Aug. 31, 2014
Schedule of Equity Method Investments [Line Items]
Equity method investment – August 31, 2014		$ 2,243,524
Equity in earnings – nine months ended May 31, 2015	$ 132,824
Reclassification of translation gains on foreign currency translation	(492,680)
Investment at carrying value – May 31, 2015	$ 1,883,668

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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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