Note 12 - Geographic and Segment Information (Details) - Net Sales by Segment (USD $)	3 Months Ended		6 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2015	Feb. 28, 2014
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales by segment	$ 6,728,709	$ 6,219,008	$ 13,942,804	$ 12,528,108
ZERUST [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales by segment	5,783,985	5,555,051	12,022,056	11,304,064
Natur-Tec [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales by segment	$ 944,724	$ 663,957	$ 1,920,748	$ 1,224,044