Note 11 - Segment and Geographic Information (Tables)

12 Months Ended

Aug. 31, 2018

Notes Tables

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

	Fiscal 2018		Fiscal 2017
ZERUST ® net sales	$	41,374,305	$	32,789,283
Natur-Tec ® net sales		10,050,516		6,779,840
Total net sales	$	51,424,821	$	39,569,123

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

	Fiscal 2018		Fiscal 2017
Direct cost of goods sold
ZERUST®	$	24,326,493	$	18,996,264
Natur-Tec®		7,303,439		4,925,061
Indirect cost of goods sold		2,535,508		2,395,186
Total net cost of goods sold	$	34,165,440	$	26,316,511

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

	Fiscal Year Ended August 31,
	2018		2017
Inside the U.S.A. to unaffiliated customers	$	25,301,243	$	21,787,694
Outside the U.S.A. to:
Joint ventures in which the Company is a shareholder directly and indirectly		2,908,072		3,222,478
Unaffiliated customers		23,215,506		14,558,951
	$	51,424,821	$	39,569,123

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

	At August 31, 2018		At August 31, 2017
China	$	205,490	$	228,458
Brazil		71,677		54,646
Germany		7,058		14,171
India		22,220		14,712
United States		6,862,381		7,047,675
Total long-lived assets	$	7,168,826	$	7,359,662

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

	Fiscal Year Ended August 31, 2018		Fiscal Year Ended August 31, 2017
China	$	12,507,039	$	7,225,659
Brazil		3,093,697		2,394,730
India		3,052,741		1,816,929
Other		7,470,101		6,344,111
United States		25,301,243		21,787,694
Total net sales	$	51,424,821	$	39,569,123

Fees for Services Provided to Joint Ventures [Member]

Notes Tables

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

	Fiscal 2018		Fiscal 2017
Germany	$	900,316	$	838,628
Poland		775,319		661,226
Japan		759,418		641,699
Sweden		600,336		472,819
France		532,565		410,842
Thailand		429,319		448,013
Czech		377,844		314,834
South Korea		370,171		376,002
India		365,018		322,677
United Kingdom		352,585		295,761
Finland		320,501		292,225
Other		358,747		377,961
	$	6,142,139	$	5,452,687