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Note 11 - Segment and Geographic Information (Tables)

6 Months Ended

Feb. 28, 2019

Notes Tables

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

		Three Months Ended								Six Months Ended
		February 28, 2019				February 28, 2018				February 28, 2019				February 28, 2018
ZERUST® net sales		$	9,108,395			$	10,191,459			$	19,173,569			$	19,719,196
Natur-Tec® net sales			4,207,009				2,022,516				8,235,887				4,037,817
Total net sales		$	13,315,404			$	12,213,975			$	27,409,456			$	23,757,013

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

		Three Months Ended																Six Months Ended
		February 28, 2019				% of Segment Sales*				February 28, 2018				% of Segment Sales*				February 28, 2019				% of Segment Sales*				February 28, 2018				% of Segment Sales*
Direct cost of goods sold
ZERUST®		$	5,249,617				57.6	%		$	6,005,262				58.9	%		$	10,871,316				56.7	%		$	11,809,242				59.9	%
Natur-Tec®			3,354,693				79.7	%			1,447,240				71.6	%			6,510,768				79.1	%			2,926,439				72.5	%
Indirect cost of goods sold			679,789				—				560,334				—				1,363,152				—				1,165,625				—
Total net cost of goods sold		$	9,284,099							$	8,012,836							$	18,745,236							$	15,901,306

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

		Three Months Ended								Six Months Ended
		February 28, 2019				February 28, 2018				February 28, 2019				February 28, 2018
Inside the U.S.A. to unaffiliated customers		$	6,467,940			$	6,079,835			$	13,391,874			$	12,336,040
Outside the U.S.A. to:
Joint ventures in which the Company is a shareholder directly and indirectly			708,955				814,122				1,192,142				1,321,753
Unaffiliated customers			6,138,509				5,320,018				12,825,440				10,099,220
		$	13,315,404			$	12,213,975			$	27,409,456			$	23,757,013

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

		At February 28, 2019				At August 31, 2018
China		$	210,031			$	205,490
Brazil			124,008				71,677
India			47,852				22,220
Other			11,502				7,058
United States			6,836,005				6,862,381
Total property and equipment		$	7,229,398			$	7,168,826

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

		Six Months Ended
		February 28, 2019				February 28, 2018
China		$	6,173,259			$	6,106,942
Brazil			1,551,595				1,456,456
India			3,875,790				1,078,294
Other			2,416,938				1,607,953
United States			13,391,874				13,507,368
Total net sales		$	27,409,456			$	23,757,013

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, 2019				% of Total Fees for Services Provided to Joint Ventures				February 28, 2018				% of Total Fees for Services Provided to Joint Ventures
Germany		$	215,337				15.0	%		$	236,700				14.7	%
Poland			188,529				13.1	%			207,038				12.9	%
Japan			167,496				11.7	%			172,032				10.7	%
Sweden			149,750				10.4	%			165,165				10.3	%
France			106,270				7.4	%			130,323				8.1	%
Thailand			105,299				7.3	%			111,779				6.9	%
United Kingdom			96,209				6.7	%			82,432				5.1	%
Czech Republic			93,928				6.6	%			98,726				6.1	%
South Korea			87,413				6.1	%			99,574				6.2	%
India			85,401				5.9	%			138,437				8.6	%
Finland			64,648				4.5	%			76,546				4.8	%
Other			76,494				5.3	%			90,138				5.6	%
		$	1,436,774				100.0	%		$	1,608,890				100.0	%

		Six Months Ended
		February 28, 2019				% of Total Fees for Services Provided to Joint Ventures				February 28, 2018				% of Total Fees for Services Provided to Joint Ventures
Germany		$	430,328				15.0	%		$	456,574				14.7	%
Poland			370,374				12.9	%			413,114				13.3	%
Japan			337,296				11.7	%			346,077				11.1	%
Sweden			279,993				9.8	%			293,119				9.4	%
France			216,332				7.6	%			269,964				8.7	%
Thailand			203,647				7.1	%			214,311				6.9	%
United Kingdom			190,990				6.7	%			194,207				6.2	%
Czech Republic			183,620				6.4	%			182,951				5.8	%
India			180,128				6.3	%			225,200				7.2	%
South Korea			173,880				6.1	%			183,062				5.9	%
Finland			146,464				5.1	%			166,172				5.3	%
Other			152,157				5.3	%			171,281				5.5	%
		$	2,865,209				100.0	%		$	3,116,032				100.0	%

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