Note 11 - Segment and Geographical Information - Net Sales by Segment (Details) - USD ($)	3 Months Ended
Nov. 30, 2017	Nov. 30, 2016
Net sales by segment	$ 11,543,038	$ 9,702,023
ZERUST [Member]
Net sales by segment	9,527,737	8,084,678
NaturTec [Member]
Net sales by segment	$ 2,015,301	$ 1,617,345

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Name:	us-gaap_SalesRevenueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration