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Note 12 - Segment and Geographic Information (Tables)

6 Months Ended

Feb. 28, 2017

Notes Tables

Reconciliation of Revenue from Segments to Consolidated [Table Text Block]

		Three Months Ended								Six Months Ended
		February 28, 2017				February 29, 2016				February 28, 2017				February 29, 2016
ZERUST® net sales		$	7,228,027			$	6,385,337			$	15,312,705			$	12,363,019
Natur-Tec® net sales			1,514,876				1,319,597				3,132,221				2,366,352
Total net sales		$	8,742,903			$	7,704,934			$	18,444,926			$	14,729,371

Reconciliation of Cost of Goods Sold from Segments to Consolidated [Table Text Block]

		Three Months Ended																Six Months Ended
		February 28, 2017				% of Segment Sales*				February 29, 2016				% of Segment Sales*				February 28, 2017				% of Segment Sales*				February 29, 2016				% of Segment Sales*
Direct cost of goods sold
ZERUST®		$	4,254,524				58.9	%		$	3,576,073				56.0	%		$	8,954,061				58.5	%		$	6,940,628				56.1	%
Natur-Tec®			1,068,231				70.5	%			984,938				74.6	%			2,281,399				72.8	%			1,819,197				76.9	%
Indirect cost of goods sold			547,431				—				707,213				—				1,247,492				—				1,383,822				—
Total net cost of goods sold		$	5,870,186							$	5,268,224							$	12,482,952							$	10,143,647

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

		Three Months Ended								Six Months Ended
		February 28, 2017				February 29, 2016				February 28, 2017				February 29, 2016
Inside the U.S.A. to unaffiliated customers		$	5,245,092			$	4,683,208			$	10,395,832			$	9,522,987
Outside the U.S.A to:
Joint ventures in which the Company is shareholder directly and indirectly			433,317				677,320				1,253,375				1,200,347
Unaffiliated customers			3,064,494				2,344,406				6,795,719				4,006,037
		$	8,742,903			$	7,704,934			$	18,444,926			$	14,729,371

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]

		At February 28, 2017				At August 31, 2016
Brazil		$	63,765			$	66,938
India			12,027				13,645
Germany			15,512				—
China			200,452				253,931
United States			7,193,441				6,941,358
Total long-lived assets		$	7,485,197			$	7,275,872

Revenue from External Customers by Geographic Areas [Table Text Block]

		Six Months Ended
		February 28, 2017				February 29, 2016
Brazil		$	1,118,166			$	997,636
India			733,581				549,402
Germany			217,496				—
China			3,296,299				1,439,754
United States			13,079,384				11,742,579
Total net sales		$	18,444,926			$	14,729,371

Fees for Services Provided to Joint Ventures [Member]

Notes Tables

Reconciliation of Revenue from Segments to Consolidated [Table Text Block]

		Three Months Ended
		February 28, 2017				% of Total Fees for Services Provided to Joint Ventures				February 29, 2016				% of Total Fees for Services Provided to Joint Ventures
Germany		$	199,509				16.8	%		$	192,869				19.9	%
Poland			153,453				13.0	%			145,765				15.0	%
Japan			145,722				12.3	%			137,476				14.2	%
Thailand			87,627				7.4	%			39,322				4.0	%
Korea			86,103				7.3	%			2,500				.3	%
France			83,112				7.0	%			73,112				7.5	%
Sweden			77,464				6.5	%			50,356				5.2	%
Czech Republic			73,286				6.2	%			64,381				6.6	%
Finland			66,946				5.7	%			52,896				5.5	%
United Kingdom			53,241				4.5	%			64,735				6.7	%
India			74,196				6.3	%			72,077				7.4	%
Other			83,369				7.0	%			75,553				7.7	%
		$	1,184,028				100.0	%		$	971,042				100.0	%

		Six Months Ended
		February 28, 2017				% of Total Fees for Services Provided to Joint Ventures				February 29, 2016				% of Total Fees for Services Provided to Joint Ventures
Germany		$	402,509				16.1	%		$	422,654				17.2	%
Poland			302,657				12.1	%			285,023				11.6	%
Japan			291,759				11.7	%			268,149				10.9	%
Thailand			235,081				9.4	%			263,063				10.7	%
Korea			191,481				7.6	%			171,902				7.0	%
France			180,785				7.2	%			162,785				6.6	%
Sweden			164,525				6.6	%			123,317				5.0	%
Czech Republic			144,114				5.8	%			121,933				5.0	%
Finland			143,282				5.7	%			121,829				5.0	%
United Kingdom			139,372				5.6	%			173,646				7.1	%
India			138,731				5.6	%			152,527				6.2	%
Other			165,323				6.6	%			189,643				7.7	%
		$	2,499,619				100.0	%		$	2,456,471				100.0	%

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