Note 12 - Segment and Geographic Information - Net Sales by Segment (Details) - USD ($)	3 Months Ended		6 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016
Net sales by segment	$ 8,742,903	$ 7,704,934	$ 18,444,926	$ 14,729,371
ZERUST [Member]
Net sales by segment	7,228,027	6,385,337	15,312,705	12,363,019
NaturTec [Member]
Net sales by segment	$ 1,514,876	$ 1,319,597	$ 3,132,221	$ 2,366,352