Note 11 - Segment and Geographic Information (Tables)

12 Months Ended

Aug. 31, 2019

Notes Tables

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

	Fiscal 2019		Fiscal 2018
ZERUST ® net sales	$	38,174,712	$	41,374,305
Natur-Tec ® net sales		17,575,425		10,050,516
Total net sales	$	55,750,137	$	51,424,821

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

	Fiscal 2019		Fiscal 2018
Direct cost of goods sold
ZERUST®	$	21,505,335	$	24,326,493
Natur-Tec®		13,691,038		7,303,439
Indirect cost of goods sold		2,773,871		2,535,508
Total net cost of goods sold	$	37,970,244	$	34,165,440

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

	Fiscal Year Ended August 31,
	2019		2018
Inside the U.S.A. to unaffiliated customers	$	24,560,459	$	25,301,243
Outside the U.S.A. to:
Joint ventures in which the Company is a shareholder directly and indirectly		2,607,554		2,908,072
Unaffiliated customers		28,582,124		23,215,506
	$	55,750,137	$	51,424,821

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

	At August 31, 2019		At August 31, 2018
China	$	337,162	$	205,490
Other		178,087		100,955
United States		6,842,910		6,862,381
Total long-lived assets	$	7,358,159	$	7,168,826

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

	Fiscal Year Ended August 31, 2019		Fiscal Year Ended August 31, 2018
China	$	13,030,298	$	12,507,039
Brazil		3,151,509		3,093,697
India		8,109,468		3,052,741
Other		6,898,403		7,470,101
United States		24,560,459		25,301,243
Total net sales	$	55,750,137	$	51,424,821

Fees for Services Provided to Joint Ventures [Member]

Notes Tables

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

	Fiscal 2019		Fiscal 2018
Germany	$	852,526	$	900,316
Japan		748,489		759,418
Poland		704,942		775,319
Sweden		589,654		600,336
France		430,537		532,565
Thailand		418,334		429,319
India		350,171		365,018
South Korea		346,244		370,171
Czech		345,798		377,844
United Kingdom		319,671		352,585
Finland		281,296		320,501
Other		339,917		358,747
	$	5,727,579	$	6,142,139