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Note 11 - Segment and Geographical Information (Tables)

6 Months Ended

Feb. 28, 2018

Notes Tables

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

		Three Months Ended								Six Months Ended
		February 28, 2018				February 28, 2017				February 28, 2018				February 28, 2017
ZERUST® net sales		$	10,191,459			$	7,228,027			$	19,719,196			$	15,312,705
Natur-Tec® net sales			2,022,516				1,514,876				4,037,817				3,132,221
Total net sales		$	12,213,975			$	8,742,903			$	23,757,013			$	18,444,926

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

		Three Months Ended																Six Months Ended
		February 28, 2018				% of Segment Sales*				February 28, 2017				% of Segment Sales*				February 28, 2018				% of Segment Sales*				February 28, 2017				% of Segment Sales*
Direct cost of goods sold
ZERUST®		$	6,005,262				58.9	%		$	4,254,524				58.9	%		$	11,809,242				59.9	%		$	8,954,061				58.5	%
Natur-Tec®			1,447,240				71.6	%			1,068,231				70.5	%			2,926,439				72.5	%			2,281,399				72.8	%
Indirect cost of goods sold			560,334				—				547,431				—				1,165,625				—				1,247,492				—
Total net cost of goods sold		$	8,012,836							$	5,870,186							$	15,901,306							$	12,482,952

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

		Three Months Ended								Six Months Ended
		February 28, 2018				February 28, 2017				February 28, 2018				February 28, 2017
Inside the U.S.A. to unaffiliated customers		$	6,079,835			$	5,245,092			$	12,336,040			$	10,395,832
Outside the U.S.A to:
Joint ventures in which the Company is shareholder directly and indirectly			814,122				433,317				1,321,753				1,253,375
Unaffiliated customers			5,320,018				3,064,494				10,099,220				6,795,719
		$	12,213,975			$	8,742,903			$	23,757,013			$	18,444,926

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

		At February 28, 2018				At August 31, 2017
China		$	222,089			$	228,458
Brazil			49,748				54,646
Germany			13,813				14,171
India			13,186				14,712
United States			6,857,110				7,047,675
Total property and equipment		$	7,155,946			$	7,359,662

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

		Six Months Ended
		February 28, 2018				February 28, 2017
China		$	6,106,942			$	3,296,299
Brazil			1,456,456				1,118,166
India			1,078,294				733,581
Germany			244,802				217,496
Other			1,363,151				1,531,759
United States			13,507,368				11,547,625
Total net sales		$	23,757,013			$	18,444,926

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, 2018				% of Total Fees for Services Provided to Joint Ventures				February 28, 2017				% of Total Fees for Services Provided to Joint Ventures
Germany		$	236,700				14.7	%		$	199,509				16.8	%
Poland			207,038				12.9	%			153,453				13.0	%
Japan			172,032				10.7	%			145,722				12.3	%
Sweden			165,165				10.3	%			77,464				6.5	%
India			138,437				8.6	%			74,196				6.3	%
France			130,323				8.1	%			83,112				7.0	%
Thailand			111,779				6.9	%			87,627				7.4	%
Korea			99,574				6.2	%			86,103				7.3	%
Czech Republic			98,726				6.1	%			73,286				6.2	%
United Kingdom			82,432				5.1	%			53,241				4.5	%
Finland			76,546				4.8	%			66,946				5.7	%
Other			90,138				5.6	%			83,369				7.0	%
		$	1,608,890				100.0	%		$	1,184,028				100.0	%

		Six Months Ended
		February 28, 2018				% of Total Fees for Services Provided to Joint Ventures				February 28, 2017				% of Total Fees for Services Provided to Joint Ventures
Germany		$	456,574				14.7	%		$	402,509				16.1	%
Poland			413,114				13.3	%			302,657				12.1	%
Japan			346,077				11.1	%			291,759				11.7	%
Sweden			293,119				9.4	%			164,525				6.6	%
France			269,964				8.7	%			180,785				7.2	%
India			225,200				7.2	%			138,731				5.6	%
Thailand			214,311				6.9	%			235,081				9.4	%
United Kingdom			194,207				6.2	%			139,372				5.6	%
Korea			183,062				5.9	%			191,481				7.6	%
Czech Republic			182,951				5.8	%			144,114				5.8	%
Finland			166,172				5.3	%			143,282				5.7	%
Other			171,281				5.5	%			165,323				6.6	%
		$	3,116,032				100.0	%		$	2,499,619				100.0	%

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