Note 12 - Geographic And Segment Information (Details) - Cost of Goods Sold By Segment (USD $)	12 Months Ended
	Aug. 31, 2013	Aug. 31, 2012
Direct cost of goods sold
Indirect cost of goods sold	$ 15,473,212	$ 14,528,785
Indirect cost of goods sold	68.80%	63.80%
ZERUST [Member] | Direct Cost of Goods Sold [Member]
Direct cost of goods sold
Indirect cost of goods sold	11,408,604	10,748,865
Indirect cost of goods sold	55.80%	51.30%
Natur-Tec [Member] | Direct Cost of Goods Sold [Member]
Direct cost of goods sold
Indirect cost of goods sold	1,731,398	1,585,731
Indirect cost of goods sold	84.70%	87.60%
Indirect Cost of Goods Sold [Member]
Direct cost of goods sold
Indirect cost of goods sold	$ 2,333,210	$ 2,194,190