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Note 11 - Segment and Geographic Information (Tables)

6 Months Ended

Feb. 29, 2020

Notes Tables

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

		Three Months Ended								Six Months Ended
		February 29, 2020				February 28, 2019				February 29, 2020				February 28, 2019
ZERUST ® net sales		$	9,016,222			$	9,108,395			$	18,965,734			$	19,173,569
Natur-Tec ® net sales			4,217,561				4,207,009				8,899,449				8,235,887
Total net sales		$	13,233,783			$	13,315,404			$	27,865,183			$	27,409,456

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

		Three Months Ended																Six Months Ended
		February 29, 2020				% of Segment Sales*				February 28, 2019				% of Segment Sales*				February 29, 2020				% of Segment Sales*				February 28, 2019				% of Segment Sales*
Direct cost of goods sold
ZERUST ®		$	4,638,514				51.4	%		$	5,249,617				57.6	%		$	10,081,686				53.7	%		$	10,871,316				56.7	%
Natur-Tec ®			3,276,058				77.7	%			3,354,693				79.7	%			6,890,477				77.4	%			6,510,768				79.1	%
Indirect cost of goods sold			772,729				—				679,789				—				1,420,040				—				1,363,152				—
Total net cost of goods sold		$	8,687,301							$	9,284,099							$	18,492,385							$	18,745,236

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

		Three Months Ended								Six Months Ended
		February 29, 2020				February 28, 2019				February 29, 2020				February 28, 2019
Inside the U.S.A. to unaffiliated customers		$	6,628,647			$	6,467,940			$	14,527,345			$	13,391,874
Outside the U.S.A. to:
Joint ventures in which the Company is a shareholder directly and indirectly			245,630				708,955				831,246				1,192,142
Unaffiliated customers			6,359,506				6,138,509				12,506,592				12,825,440
		$	13,233,783			$	13,315,404			$	27,865,183			$	27,409,456

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

		At February 29, 2020				At August 31, 2019
China		$	397,139			$	337,162
Brazil			79,825				101,548
Germany			23,734				14,791
India			72,951				61,748
United States			6,653,875				6,842,910
Total property and equipment		$	7,227,524			$	7,358,159

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

		Three Months Ended
		February 29, 2020				February 28, 2019
China		$	3,024,384			$	3,005,199
Brazil			823,218				726,799
India			2,059,564				2,224,149
Other			967,111				891,317
United States			6,359,506				6,467,940
Total net sales		$	13,233,783			$	13,315,404

		Six Months Ended
		February 29, 2020				February 28, 2019
China		$	6,885,956			$	6,173,259
Brazil			1,715,196				1,551,595
India			4,095,774				3,875,790
Other			2,661,665				2,416,938
United States			12,506,592				13,391,874
Total net sales		$	27,865,183			$	27,409,456

Fees for Services Provided to Joint Ventures [Member]

Notes Tables

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

		Three Months Ended
		February 29, 2020				% of Total Fees for Services Provided to Joint Ventures				February 28, 2019				% of Total Fees for Services Provided to Joint Ventures
Germany		$	208,128				16.6	%		$	215,337				15.0	%
Poland			170,916				13.6	%			188,529				13.1	%
Japan			150,150				12.0	%			167,496				11.7	%
Sweden			98,398				7.8	%			149,750				10.4	%
Thailand			90,878				7.2	%			105,299				7.3	%
France			85,709				6.8	%			106,270				7.4	%
United Kingdom			64,279				5.1	%			96,209				6.7	%
Czech Republic			80,200				6.4	%			93,928				6.6	%
India			80,024				6.4	%			85,401				5.9	%
South Korea			75,289				6.0	%			87,413				6.1	%
Finland			74,001				5.9	%			64,648				4.5	%
Other			78,241				6.2	%			76,494				5.3	%
		$	1,256,213				100.0	%		$	1,436,774				100.0	%

		Six Months Ended
		February 29, 2020				% of Total Fees for Services Provided to Joint Ventures				February 28, 2019				% of Total Fees for Services Provided to Joint Ventures
Germany		$	420,229				16.1	%		$	430,328				15.0	%
Poland			365,894				14.0	%			370,374				12.9	%
Japan			314,079				12.0	%			337,296				11.7	%
Sweden			207,904				8.0	%			279,993				9.8	%
Thailand			193,212				7.4	%			203,647				7.1	%
France			179,340				6.9	%			216,332				7.6	%
United Kingdom			149,758				5.7	%			190,990				6.7	%
Czech Republic			169,214				6.5	%			183,620				6.4	%
India			162,984				6.2	%			180,128				6.3	%
South Korea			151,321				5.8	%			173,880				6.1	%
Finland			141,942				5.4	%			146,464				5.1	%
Other			158,661				6.1	%			152,157				5.3	%
		$	2,614,538				100.0	%		$	2,865,209				100.0	%

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