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Note 12 - Cost of Goods Sold by Segment (Details) - USD ($)

3 Months Ended

Nov. 30, 2015

Nov. 30, 2014

Direct Cost of Goods Sold [Member] | ZERUST [Member]

Cost of goods sold

$ 3,364,555

$ 3,338,588

Percentage of product sales

^[1]

56.30%

53.50%

Direct Cost of Goods Sold [Member] | NaturTec [Member]

Cost of goods sold

$ 834,259

$ 782,575

Percentage of product sales

^[1]

79.70%

80.20%

Indirect Cost of Goods Sold [Member]

Cost of goods sold

$ 676,609

$ 685,448

Cost of goods sold

$ 4,875,423

$ 4,806,611

Percentage of product sales

^[1]

[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.