Note 13 - Segment and Geographic Information (Tables)

9 Months Ended

May 31, 2022

Notes Tables

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

	Three Months Ended May 31,				Nine Months Ended May 31,
	2022		2021		2022		2021
ZERUST® net sales	$	14,446,832	$	12,378,215	$	41,988,394	$	32,882,882
Natur-Tec® net sales		4,518,089		3,040,309		11,918,579		8,097,636
Total net sales	$	18,964,921	$	15,418,524	$	53,906,973	$	40,980,518

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

	Three Months Ended May 31,										Nine Months Ended May 31,
	2022		% of Product Sales*			2021		% of Product Sales*			2022		% of Product Sales*			2021		% of Product Sales*
Direct cost of goods sold
ZERUST®	$	8,409,392		58.2	%	$	7,091,220		57.3	%	$	25,267,333		60.2	%	$	18,928,272		57.6	%
Natur-Tec®		3,432,152		76.0	%		2,251,996		74.1	%		9,129,686		76.6	%		5,703,807		70.4	%
Indirect cost of goods sold		881,289		—			809,366		—			2,580,601		—			2,365,503		—
Total net cost of goods sold	$	12,722,833				$	10,152,582				$	36,977,620				$	26,997,582

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

	Three Months Ended May 31,				Nine Months Ended May 31,
	2022		2021		2022		2021
Inside the U.S.A. to unaffiliated customers	$	6,884,726	$	6,717,886	$	18,157,010	$	16,198,372
Outside the U.S.A. to:
Joint ventures in which the Company is a shareholder directly and indirectly		528,665		1,253,919		2,252,618		2,361,165
Unaffiliated customers		11,551,530		7,446,719		33,497,345		22,420,981
	$	18,964,921	$	15,418,524	$	53,906,973	$	40,980,518

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

	As of May 31, 2022		As of August 31, 2021
China	$	5,528,663	$	5,110,071
Other		617,674		453,199
United States		6,642,735		6,967,761
Total property and equipment and patents	$	12,789,072	$	12,531,031

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

	Three Months Ended May 31,				Nine Months Ended May 31,
	2022		2021		2022		2021
China	$	3,624,396	$	4,037,493	$	11,845,989		13,025,127
Brazil		1,554,364		1,237,586		3,786,670		2,756,008
India		4,824,004		1,540,734		13,369,769		4,036,208
Other		2,077,431		1,884,825		6,747,535		4,964,803
United States		6,884,726		6,717,886		18,157,010		16,198,372
Total net sales	$	18,964,921	$	15,418,524	$	53,906,973	$	40,980,518

Fees for Services Provided to Joint Ventures [Member]

Notes Tables

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

	Three Months Ended May 31,
	2022		% of Total Fees for Services Provided to Joint Ventures			2021		% of Total Fees for Services Provided to Joint Ventures
Germany	$	204,316		15.4	%	$	232,026		14.6	%
Poland		171,181		12.9	%		226,174		14.2	%
Japan		168,075		12.6	%		200,270		12.6	%
France		123,869		9.3	%		119,172		7.5	%
Sweden		130,681		9.8	%		127,710		8.0	%
United Kingdom		89,363		6.7	%		113,886		7.2	%
Thailand		95,574		7.2	%		108,842		6.8	%
Finland		92,036		6.9	%		75,577		4.8	%
Czech Republic		84,797		6.4	%		109,680		6.9	%
South Korea		78,542		5.9	%		78,507		4.9	%
Other		91,554		6.9	%		197,777		12.4	%
	$	1,329,988		100.0	%	$	1,589,621		100.0	%

	Nine Months Ended May 31,
	2022		% of Total Fees for Services Provided to Joint Ventures			2021		% of Total Fees for Services Provided to Joint Ventures
Germany	$	639,738		16.7	%	$	692,770		15.8	%
Poland		520,807		13.6	%		626,527		14.3	%
Japan		486,815		12.7	%		561,725		12.8	%
France		355,827		9.3	%		322,717		7.4	%
Sweden		337,929		8.8	%		365,095		8.3	%
United Kingdom		271,027		7.1	%		247,560		5.6	%
Thailand		271,046		7.1	%		306,151		7.0	%
Finland		257,635		6.7	%		223,356		5.1	%
Czech Republic		224,280		5.8	%		268,571		6.1	%
South Korea		205,342		5.4	%		241,805		5.5	%
Other		265,309		6.9	%		532,589		12.1	%
	$	3,835,755		100.0	%	$	4,388,866		100.0	%