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Note 12 - Segment and Geographic Information (Tables)

9 Months Ended

May 31, 2017

Notes Tables

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

		Three Months Ended																Nine Months Ended
		May 31, 2017				% of Segment Sales*				May 31, 2016				% of Segment Sales*				May 31, 2017				% of Segment Sales*				May 31, 2016				% of Segment Sales*
Direct cost of goods sold
ZERUST®		$	4,834,355				57.8	%		$	4,028,114				56.1	%		$	13,788,416				58.2	%		$	10,968,742				56.1	%
Natur-Tec®			1,327,323				71.6	%			1,119,730				74.6	%			3,608,722				72.4	%			2,938,927				76.0	%
Indirect cost of goods sold			612,323				—				629,405				—				1,859,815				—				2,013,227				—
Total net cost of goods sold		$	6,774,001							$	5,777,249							$	19,256,953							$	15,920,896

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

		Three Months Ended								Nine Months Ended
		May 31, 2017				May 31, 2016				May 31, 2017				May 31, 2016
Inside the U.S.A. to unaffiliated customers		$	5,967,459			$	5,559,885			$	16,363,291			$	14,762,170
Outside the U.S.A. to:
Joint ventures in which the Company is a shareholder directly and indirectly			862,136				446,322				2,115,511				1,967,370
Unaffiliated customers			3,393,424				2,680,368				10,189,143				6,686,406
		$	10,223,019			$	8,686,575			$	28,667,945			$	23,415,946

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

		Three Months Ended								Nine Months Ended
		May 31, 2017				May 31, 2016				May 31, 2017				May 31, 2016
ZERUST® net sales		$	8,368,487			$	7,185,955			$	23,681,192			$	19,548,974
Natur-Tec® net sales			1,854,532				1,500,620				4,986,753				3,866,972
Total net sales		$	10,223,019			$	8,686,575			$	28,667,945			$	23,415,946

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

		At May 31, 2017				At August 31, 2016
Brazil		$	56,246			$	66,938
India			13,634				13,645
Germany			13,687				—
China			231,114				253,931
United States			7,137,218				6,941,358
Total long-lived assets		$	7,451,899			$	7,275,872

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

		Nine Months Ended
		May 31, 2017				May 31, 2016
Brazil		$	1,683,255			$	1,509,659
India			1,057,132				911,227
Germany			378,635				—
China			4,991,807				2,473,733
United States			20,557,116				18,521,327
Total net sales		$	28,667,945			$	23,415,946

Fees for Services Provided to Joint Ventures [Member]

Notes Tables

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

		Three Months Ended
		May 31, 2017				% of Total Fees for Services Provided to Joint Ventures				May 31, 2016				% of Total Fees for Services Provided to Joint Ventures
Germany		$	212,257				14.7	%		$	242,158				17.9	%
Poland			180,969				12.6	%			167,237				12.4	%
Japan			153,903				10.7	%			148,091				11.0	%
Sweden			150,139				10.4	%			66,239				4.9	%
France			112,455				7.8	%			87,588				6.5	%
Thailand			104,771				7.3	%			132,548				9.8	%
Korea			92,954				6.4	%			74,085				5.5	%
India			90,469				6.3	%			70,610				5.2	%
United Kingdom			87,768				6.1	%			135,068				10.0	%
Finland			78,012				5.4	%			55,876				4.1	%
Czech Republic			74,135				5.1	%			54,537				4.0	%
Other			104,216				7.2	%			117,876				8.7	%
		$	1,442,048				100.0	%		$	1,351,913				100.0	%

		Nine Months Ended
		May 31, 2017				% of Total Fees for Services Provided to Joint Ventures				May 31, 2016				% of Total Fees for Services Provided to Joint Ventures
Germany		$	614,766				15.6	%		$	664,812				17.4	%
Poland			483,626				12.3	%			452,260				11.8	%
Japan			445,662				11.3	%			416,241				10.9	%
Thailand			339,852				8.6	%			395,611				10.4	%
Sweden			314,664				8.0	%			189,556				5.0	%
France			293,240				7.4	%			250,373				6.6	%
Korea			284,435				7.2	%			247,730				6.5	%
India			229,200				5.8	%			223,137				5.9	%
United Kingdom			227,140				5.8	%			292,216				7.7	%
Finland			221,294				5.6	%			177,704				4.7	%
Czech Republic			218,249				5.5	%			176,470				4.6	%
Other			269,539				6.9	%			322,274				8.5	%
		$	3,941,667				100.0	%		$	3,808,384				100.0	%

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