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Note 11 - Segment and Geographical Information - Cost of Goods Sold by Segment (Details) - USD ($)		3 Months Ended		6 Months Ended
		Feb. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017
ZERUST®		$ 8,012,836	$ 5,870,186	$ 15,901,306	$ 12,482,952
ZERUST®	[1]
Direct Cost of Goods Sold [Member] | ZERUST [Member]
ZERUST®		$ 6,005,262	$ 4,254,524	$ 11,809,242	$ 8,954,061
ZERUST®	[1]	58.90%	58.90%	59.90%	58.50%
Direct Cost of Goods Sold [Member] | NaturTec [Member]
ZERUST®		$ 1,447,240	$ 1,068,231	$ 2,926,439	$ 2,281,399
ZERUST®	[1]	71.60%	70.50%	72.50%	72.80%
Indirect Cost of Goods Sold [Member]
ZERUST®		$ 560,334	$ 547,431	$ 1,165,625	$ 1,247,492
ZERUST®	[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.

X

- Definition

Represents cost of goods sold as percentage of product sales.

+ References

No definition available.

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X

- Definition

Total costs related to goods produced and sold during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(a))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- Details

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