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Note 13 - Segment and Geographic Information (Tables)

6 Months Ended

Feb. 28, 2022

Notes Tables

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

		Three Months Ended February 28,								Six Months Ended February 28,
		2022				2021				2022				2021
ZERUST® net sales		$	13,117,777			$	10,284,116			$	27,541,562			$	20,504,667
Natur-Tec® net sales			3,630,862				2,498,766				7,400,490				5,057,327
Total net sales		$	16,748,639			$	12,782,882			$	34,942,052			$	25,561,994

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

		Three Months Ended February 28,																Six Months Ended February 28,
		2022				% of Product Sales*				2021				% of Product Sales*				2022				% of Product Sales*				2021				% of Product Sales*
Direct cost of goods sold
ZERUST®		$	8,151,274				62.1	%		$	6,065,963				59.0	%		$	16,857,941				61.2	%		$	11,837,052				57.7	%
Natur-Tec®			2,775,436				76.4	%			1,684,180				67.4	%			5,697,533				77.0	%			3,451,810				68.3	%
Indirect cost of goods sold			837,594				—				781,536				—				1,699,313				—				1,556,138				—
Total net cost of goods sold		$	11,764,304							$	8,531,679							$	24,254,787							$	16,845,000

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

		Three Months Ended February 28,								Six Months Ended February 28,
		2022				2021				2022				2021
Inside the U.S.A. to unaffiliated customers		$	5,115,963			$	4,619,130			$	11,272,285			$	9,480,485
Outside the U.S.A. to:
Joint ventures in which the Company is a shareholder directly and indirectly			883,513				526,942				1,723,952				1,107,246
Unaffiliated customers			10,749,163				7,636,810				21,945,815				14,974,262
		$	16,748,639			$	12,782,882			$	34,942,052			$	25,561,994

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

		As of February 28, 2022				As of August 31, 2021
China		$	5,615,383			$	5,110,071
Other			655,837				453,199
United States			6,783,284				6,967,761
Total property and equipment and intangible assets, net		$	13,054,504			$	12,531,031

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

		Three Months Ended February 28,
		2022				2021
China		$	4,163,741			$	4,443,656
Brazil			936,089				804,569
India			4,068,781				1,295,006
Other			2,464,066				1,620,521
United States			5,115,962				4,619,130
Total net sales		$	16,748,639			$	12,782,882

		Six Months Ended February 28,
		2022				2021
China		$	8,221,593			$	8,987,634
Brazil			2,232,306				1,518,422
India			8,545,765				2,495,474
Other			4,670,103				3,079,978
United States			11,272,285				9,480,486
Total net sales		$	34,942,052			$	25,561,994

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,
		2022				% of Total Fees for Services Provided to Joint Ventures				2021				% of Total Fees for Services Provided to Joint Ventures
Germany		$	216,992				17.4	%		$	231,917				15.9	%
Poland			172,700				13.9	%			210,943				14.4	%
Japan			151,933				12.2	%			181,493				12.4	%
France			115,663				9.3	%			97,638				6.7	%
Sweden			99,178				8.0	%			146,896				10.0	%
United Kingdom			86,736				7.0	%			71,759				4.9	%
Thailand			87,918				7.1	%			107,377				7.3	%
Finland			85,426				6.9	%			71,496				4.9	%
Czech Republic			69,386				5.6	%			89,538				6.1	%
South Korea			64,173				5.1	%			78,220				5.3	%
Other			96,804				7.5	%			175,407				12.0	%
		$	1,246,909				100.0	%		$	1,462,684				100.0	%

		Six Months Ended February 28,
		2022				% of Total Fees for Services Provided to Joint Ventures				2021				% of Total Fees for Services Provided to Joint Ventures
Germany		$	435,422				17.4	%		$	460,744				16.5	%
Poland			349,626				14.0	%			400,353				14.3	%
Japan			318,740				12.7	%			361,455				12.9	%
France			231,958				9.3	%			203,545				7.3	%
Sweden			207,248				8.3	%			237,385				8.5	%
Thailand			181,663				7.2	%			133,674				4.8	%
South Korea			175,472				7.0	%			197,309				7.0	%
Finland			165,599				6.6	%			147,779				5.3	%
Czech Republic			139,483				5.6	%			158,891				5.7	%
United Kingdom			126,800				5.1	%			163,298				5.8	%
Other			173,756				6.8	%			334,811				12.0	%
		$	2,505,767				100.0	%		$	2,799,245				100.0	%

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