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Note 12 - Segment and Geographic Information (Tables)

12 Months Ended

Aug. 31, 2016

Fees for Services Provided to Joint Ventures [Member]

Notes Tables

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

		Fiscal 2016				Fiscal 2015
Germany		$	845,857			$	873,400
Japan			646,015				599,108
Poland			599,391				600,255
Thailand			537,212				554,881
United Kingdom			386,761				396,514
Korea			352,393				192,539
France			329,805				412,608
India			300,506				277,548
Sweden			265,745				323,610
Finland			252,578				281,620
Czech			237,062				229,185
China			0				494,080
Other			384,385				480,143
		$	5,137,710			$	5,715,491

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

		Fiscal 2016				Fiscal 2015
ZERUST ® net sales		$	27,577,566			$	26,042,909
Natur-Tec ® net sales			5,355,999				4,279,784
Total net sales		$	32,933,565			$	30,322,693

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

		Fiscal 2016				Fiscal 2015
Direct cost of goods sold
ZERUST ®		$	15,588,133			$	14,399,456
Natur-Tec ®			4,076,249				3,232,353
Indirect cost of goods sold			2,655,774				2,924,124
Total net cost of goods sold		$	22,320,156			$	20,555,932

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

		Fiscal Year Ended August 31,
		2016				2015
Inside the U.S.A. to unaffiliated customers		$	20,304,480			$	19,329,979
Outside the U.S.A. to:
Joint ventures in which the Company is a shareholder directly and indirectly			2,721,905				2,831,301
Unaffiliated customers			9,907,180				8,161,413
		$	32,933,565			$	30,322,693

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

		At August 31, 2016				At August 31, 2015
China		$	253,931			$	45,220
Brazil			66,938				46,918
India			13,645				16,402
United States			8,219,955				8,446,842
Total long-lived assets		$	8,554,469			$	8,555,382

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

		Fiscal Year Ended August 31, 2016				Fiscal Year Ended August 31, 2015
China		$	4,114,288			$	1,070,422
Brazil			2,172,297				2,623,938
India			1,104,947				967,241
Other			5,237,553				6,331,113
United States			20,304,480				19,329,979
Total net sales		$	32,933,565			$	30,322,693

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