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Note 12 - Geographic and Segment Information (Details) - Net Sales by Segment (USD $)	3 Months Ended						12 Months Ended		15 Months Ended
	Aug. 31, 2014	May 31, 2014	Feb. 28, 2014	Aug. 31, 2013	May 31, 2013	Feb. 28, 2013	Aug. 31, 2014	Aug. 31, 2013	Nov. 30, 2014	Nov. 30, 2013
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	$ 7,377,180	$ 6,920,820	$ 6,219,008	$ 6,086,734	$ 5,877,033	$ 5,246,350	$ 26,826,108	$ 22,501,864	$ 6,309,100	$ 5,291,747
Change in $							4,324,244
Change in %							19.20%
ZERUST [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales							23,845,288	20,457,198
Change in $							3,388,090
Change in %							16.60%
Natur-Tec [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales							2,980,820	2,044,666
Change in $							$ 936,154
Change in %							45.80%