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Note 12 - Segment and Geographic Information (Tables)

12 Months Ended

Aug. 31, 2017

Notes Tables

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

		Fiscal 2017				Fiscal 2016
ZERUST ® net sales		$	32,789,283			$	27,577,566
Natur-Tec ® net sales			6,779,840				5,355,999
Total net sales		$	39,569,123			$	32,933,565

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

		Fiscal 2017				Fiscal 2016
Direct cost of goods sold
ZERUST®		$	18,996,264			$	15,588,133
Natur-Tec®			4,925,061				4,076,249
Indirect cost of goods sold			2,395,186				2,655,774
Total net cost of goods sold		$	26,316,511			$	22,320,156

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

		Fiscal Year Ended August 31,
		2017				2016
Inside the U.S.A. to unaffiliated customers		$	21,787,694			$	20,304,480
Outside the U.S.A. to:
Joint ventures in which the Company is a shareholder directly and indirectly			3,222,478				2,721,905
Unaffiliated customers			14,558,951				9,907,180
		$	39,569,123			$	32,933,565

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

		At August 31, 2017				At August 31, 2016
China		$	228,458			$	253,931
Brazil			54,646				66,938
Germany			14,171				—
India			14,712				13,645
United States			7,047,675				8,219,955
Total long-lived assets		$	7,359,662			$	8,554,469

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

		Fiscal Year Ended August 31, 2017				Fiscal Year Ended August 31, 2016
China		$	7,225,659			$	4,114,288
Brazil			2,394,730				2,172,297
Germany			711,923				—
India			1,417,955				1,104,947
Other			6,031,162				5,237,553
United States			21,787,694				20,304,480
Total net sales		$	39,569,123			$	32,933,565

Fees for Services Provided to Joint Ventures [Member]

Notes Tables

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

		Fiscal 2017				Fiscal 2016
Germany		$	838,628			$	845,857
Poland			661,226				599,391
Japan			641,699				646,015
Sweden			472,819				265,745
Thailand			448,013				537,212
France			410,842				329,805
South Korea			376,002				352,393
India			322,677				300,506
Czech			314,834				237,062
United Kingdom			295,761				386,761
Finland			292,225				252,578
Other			377,962				384,385
		$	5,452,687			$	5,137,710

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