Note 12 - Segment and Geographic Information - Cost of Goods Sold by Segment (Details) - USD ($)		12 Months Ended
		Aug. 31, 2017	Aug. 31, 2016
Cost of goods sold		$ 26,316,511	$ 22,320,156
Precentage of product sales	[1]		22320156.00%
Direct Cost of Goods Sold [Member] | ZERUST [Member]
Cost of goods sold		18,996,264
Precentage of product sales	[1]		15588133.00%
Direct Cost of Goods Sold [Member] | NaturTec [Member]
Cost of goods sold		4,925,061
Precentage of product sales	[1]		4076249.00%
Indirect Cost of Goods Sold [Member]
Cost of goods sold		$ 2,395,186
Precentage of product sales	[1]		2655774.00%

[1] The percent of segment sales is calculated by dividing the direct cost of goods sold for each individual segment category by the net sales for each segment category.