Note 11 - Segment and Geographic Information (Tables)

3 Months Ended

Feb. 29, 2024

Notes Tables

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

	Three Months Ended				Six Months Ended
	February 29, 2024		February 28, 2023		February 29, 2024		February 28, 2023
ZERUST® net sales	$	15,218,095	$	14,458,747	$	30,623,840	$	29,828,748
Natur-Tec® net sales		5,624,443		3,812,078		10,400,373		8,394,843
Total net sales	$	20,842,538	$	18,270,825	$	41,024,213	$	38,223,591

	Three Months Ended
	February 29, 2024		% of Total Fees for Services Provided to Joint Ventures			February 28, 2023		% of Total Fees for Services Provided to Joint Ventures
Poland	$	217,786		16.7	%	$	199,927		16.0	%
Germany		206,740		15.9	%		202,964		16.2	%
France		195,176		15.0	%		118,938		9.5	%
Japan		111,995		8.6	%		153,795		12.3	%
Sweden		102,984		7.9	%		112,615		9.0	%
Finland		95,748		7.3	%		91,620		7.3	%
Thailand		90,264		6.9	%		91,601		7.3	%
Czech Republic		84,789		6.5	%		91,001		7.3	%
South Korea		63,381		4.9	%		65,803		5.3	%
United Kingdom		55,101		4.2	%		65,648		5.2	%
Other		79,095		6.1	%		58,834		4.7	%
	$	1,303,059		100.0	%	$	1,252,746		100.0	%

	Six Months Ended
	February 29, 2024		% of Total Fees for Services Provided to Joint Ventures			February 28, 2023		% of Total Fees for Services Provided to Joint Ventures
Poland	$	415,803		16.3	%	$	386,623		15.9	%
Germany		412,383		16.2	%		396,792		16.3	%
France		317,142		12.4	%		228,295		9.4	%
Japan		248,076		9.7	%		301,715		12.4	%
Sweden		213,520		8.4	%		213,051		8.8	%
Finland		199,492		7.8	%		182,052		7.5	%
Thailand		169,702		6.6	%		174,557		7.2	%
Czech Republic		162,601		6.4	%		171,333		7.0	%
South Korea		138,338		5.4	%		129,197		5.3	%
United Kingdom		118,251		4.6	%		123,339		5.1	%
Other		156,709		6.1	%		127,597		5.2	%
	$	2,552,017		100.0	%	$	2,434,551		100.0	%

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

	Three Months Ended										Six Months Ended
	February 29, 2024		% of Product Sales*			February 28, 2023		% of Product Sales*			February 29, 2024		% of Product Sales*			February 28, 2023		% of Product Sales*
Direct cost of goods sold
ZERUST®	$	8,082,163		53.1	%	$	8,115,451		56.1	%	$	16,826,187		54.9	%	$	17,294,705		58.0	%
Natur-Tec®		3,568,719		63.5	%		2,931,036		76.9	%		6,797,302		65.4	%		6,501,709		77.4	%
Indirect cost of goods sold		852,492		—			921,270		—			1,727,286		—			1,770,985		—
Total net cost of goods sold	$	12,503,374				$	11,967,757				$	25,350,775				$	25,567,399

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

	Three Months Ended				Six Months Ended
	February 29, 2024		February 28, 2023		February 29, 2024		February 28, 2023
Inside the U.S.A. to unaffiliated customers	$	6,840,855	$	6,750,997	$	14,073,236	$	14,229,158
Outside the U.S.A. to:
Joint ventures in which the Company is a shareholder directly and indirectly		611,926		1,529,763		1,463,377		2,163,228
Unaffiliated customers		13,389,757		9,990,065		25,487,600		21,831,205
	$	20,842,538	$	18,270,825	$	41,024,213	$	38,223,591

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

	At February 29, 2024		At August 31, 2023
China	$	5,680,609	$	5,729,080
Other		804,148		745,469
United States		8,478,429		7,590,805
Total property and equipment, net	$	14,963,186	$	14,065,354

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

	Three Months Ended
	February 29, 2024		February 28, 2023
China	$	3,455,846	$	2,871,795
Brazil		1,326,867		1,206,790
India		5,406,404		4,364,358
Other		3,812,566		3,076,885
United States		6,840,855		6,750,997
Total net sales	$	20,842,538	$	18,270,825

	Six Months Ended
	February 29, 2024		February 28, 2023
China	$	7,134,369	$	6,618,435
Brazil		2,856,490		2,574,208
India		10,586,795		9,211,285
Other		6,373,323		5,590,505
United States		14,073,236		14,229,158
Total net sales	$	41,024,213	$	38,223,591