Note 12 - Geographic and Segment Information (Tables)

6 Months Ended

Feb. 29, 2016

Fees for Services Provided to Joint Ventures [Member]

Notes Tables

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

	Three Months Ended
	February 29, 2016		% of Total Fees for Services Provided to Joint Ventures			February 28, 2015		% of Total Fees for Services Provided to Joint Ventures
Germany	$	192,869		19.9	%	$	202,633		20.4	%
Poland		145,765		15.0	%		116,612		11.7	%
Japan		137,476		14.2	%		124,202		12.5	%
France		73,112		7.5	%		76,518		7.7	%
India		72,077		7.4	%		73,971		7.4	%
United Kingdom		64,735		6.7	%		115,000		11.6	%
Finland		52,896		5.5	%		52,693		5.3	%
Sweden		50,356		5.2	%		72,297		7.3	%
Thailand		39,322		4.0	%		156,519		15.7	%
Other		142,434		14.6	%		4,415		0.1	%
	$	971,042		100.0	%	$	994,860		100.0	%

	Six Months Ended
	February 29, 2016		% of Total Fees for Services Provided to Joint Ventures			February 28, 2015		% of Total Fees for Services Provided to Joint Ventures
Germany	$	422,654		17.2	%	$	440,954		14.1	%
Poland		285,023		11.6	%		287,836		9.2	%
Japan		268,149		10.9	%		284,544		9.1	%
Thailand		263,063		10.7	%		297,152		9.5	%
United Kingdom		173,646		7.1	%		211,371		6.8	%
France		162,785		6.6	%		209,898		6.7	%
India		152,527		6.2	%		143,262		4.6	%
Sweden		123,317		5.0	%		159,217		5.1	%
Czech Republic		121,933		5.0	%		108,649		3.4	%
Finland		121,829		5.0	%		146,215		4.7	%
China		—		0.0	%		516,139		16.5	%
Other		361,545		14.7	%		323,293		10.3	%
	$	2,456,471		100.0	%	$	3,128,530		100.0	%

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

	Three Months Ended				Six Months Ended
	February 29, 2016		February 28, 2015		February 29, 2016		February 28, 2015
ZERUST® net sales	$	6,385,337	$	5,783,985	$	12,363,019	$	12,022,056
Natur-Tec® net sales		1,319,597		944,724		2,366,352		1,920,748
Total net sales	$	7,704,934	$	6,728,709	$	14,729,371	$	13,942,804

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

	Three Months Ended										Six Months Ended
	February 29, 2016		% of Segment Sales*			February 28, 2015		% of Segment Sales*			February 29, 2016		% of Segment Sales*			February 28, 2015		% of Segment Sales*
Direct cost of goods sold
ZERUST®	$	3,576,073		56.0	%	$	3,171,103		54.8	%	$	6,940,628		56.1	%	$	6,509,691		54.1	%
Natur-Tec®		984,938		74.6	%		719,048		76.1	%		1,819,197		76.9	%		1,501,623		78.2	%
Indirect cost of goods sold		707,213		—			767,589		—			1,383,822		—			1,453,037		—
Total net cost of goods sold	$	5,268,224				$	4,657,740				$	10,143,647				$	9,464,351

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

	Three Months Ended				Six Months Ended
	February 29, 2016		February 28, 2015		February 29, 2016		February 28, 2015
Inside the U.S.A. to unaffiliated customers	$	2,344,406	$	1,544,964	$	4,006,037	$	3,071,894
Outside the U.S.A to:
Joint ventures in which the Company is a shareholder directly and indirectly		971,501		1,198,892		1,521,047		2,007,879
Unaffiliated customers		4,389,027		3,984,853		9,202,287		8,863,031
	$	7,704,934	$	6,728,709	$	14,729,371	$	13,942,804

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

	February 29, 2016		August 31, 2015
Brazil	$	52,764	$	46,918
India		15,114		16,402
China		136,825		45,220
United States		7,106,123		7,184,623
Total long-lived assets	$	7,310,826	$	7,293,163

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

	Six Months Ended
	February 29, 2016		February 28, 2015
Brazil	$	997,636	$	1,418,236
India		549,402		416,772
China		1,439,754		20,732
United States		11,742,579		12,087,064
Total net sales	$	14,729,371	$	13,942,804