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Note 13 - Geographic and Segment Information (Tables) | 12 Months Ended
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Aug. 31, 2015
Fees for Services Provided to Joint Ventures [Member] |
Notes Tables |
Reconciliation of Revenue from Segments to Consolidated [Table Text Block] |
|  | Fiscal 2015 |  | % of Total Fees for Services Provided to Joint Ventures in Fiscal 2015 |  | Fiscal 2014 |  | % of Total Fees for Services Provided to Joint Ventures in Fiscal 2014 |  | Fiscal 2013 |  | % of Total Fees for Services Provided to Joint Ventures in Fiscal 2013
Germany |  | $ | 873,400 |  |  |  | 15.3 | % |  | $ | 1,032,234 |  |  |  | 12.7 | % |  | $ | 1,004,958 |  |  |  | 13.7 | %
Poland |  |  | 600,255 |  |  |  | 10.5 | % |  |  | 652,291 |  |  |  | 8.0 | % |  |  | 525,282 |  |  |  | 7.1 | %
Japan |  |  | 599,108 |  |  |  | 10.5 | % |  |  | 669,522 |  |  |  | 8.2 | % |  |  | 723,977 |  |  |  | 9.8 | %
Thailand |  |  | 554,881 |  |  |  | 9.7 | % |  |  | 604,316 |  |  |  | 7.4 | % |  |  | 621,807 |  |  |  | 8.4 | %
China |  |  | 494,080 |  |  |  | 8.6 | % |  |  | 2,118,018 |  |  |  | 26.0 | % |  |  | 2,063,369 |  |  |  | 28.1 | %
France |  |  | 412,608 |  |  |  | 7.2 | % |  |  | 508,705 |  |  |  | 6.2 | % |  |  | 496,897 |  |  |  | 6.8 | %
United Kingdom |  |  | 396,514 |  |  |  | 6.9 | % |  |  | 385,294 |  |  |  | 4.7 | % |  |  | 236,125 |  |  |  | 3.2 | %
Sweden |  |  | 323,610 |  |  |  | 5.7 | % |  |  | 440,117 |  |  |  | 5.4 | % |  |  | 415,547 |  |  |  | 5.7 | %
India |  |  | 277,548 |  |  |  | 4.9 | % |  |  | 364,918 |  |  |  | 4.5 | % |  |  | — |  |  |  | 0.0 | %
Czech |  |  | 229,185 |  |  |  | 4.0 | % |  |  | 288,367 |  |  |  | 3.6 | % |  |  | 210,827 |  |  |  | 2.9 | %
Korea |  |  | 192,539 |  |  |  | 3.4 | % |  |  | 315,916 |  |  |  | 3.9 | % |  |  | 393,307 |  |  |  | 5.3 | %
Finland |  |  | 281,620 |  |  |  | 4.9 | % |  |  | 355,391 |  |  |  | 4.4 | % |  |  | 321,256 |  |  |  | 4.4 | %
Other |  |  | 480,143 |  |  |  | 8.4 | % |  |  | 407,775 |  |  |  | 5.0 | % |  |  | 339,628 |  |  |  | 4.6 | %
|  | $ | 5,715,491 |  |  |  | 100.0 | % |  | $ | 8,142,863 |  |  |  | 100.0 | % |  | $ | 7,352,980 |  |  |  | 100.0 | %
Reconciliation of Revenue from Segments to Consolidated [Table Text Block] |
|  | Fiscal 2015 |  | Fiscal 2014 |  | Fiscal 2013
ZERUST ® net sales |  | $ | 26,042,909 |  |  | $ | 23,845,288 |  |  | $ | 20,457,198 |
Natur-Tec ® net sales |  |  | 4,279,784 |  |  |  | 2,980,820 |  |  |  | 2,044,666 |
Total net sales |  | $ | 30,322,693 |  |  | $ | 26,826,108 |  |  | $ | 22,501,864 |
Reconciliation of Cost of Goods Sold from Segments to Consolidated [Table Text Block] |
|  | Fiscal 2015 |  | Fiscal 2014 |  | Fiscal 2013
Direct cost of goods sold |  |  |  |  |  |  |  |  |  |  |  |
ZERUST ® |  | $ | 14,399,456 |  |  | $ | 12,941,234 |  |  | $ | 11,408,604 |
Natur-Tec ® |  |  | 3,232,353 |  |  |  | 2,234,736 |  |  |  | 1,731,398 |
Indirect cost of goods sold |  |  | 2,924,124 |  |  |  | 2,627,183 |  |  |  | 2,333,210 |
Total net cost of goods sold |  | $ | 20,555,932 |  |  | $ | 17,803,153 |  |  | $ | 15,473,212 |
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block] |
|  | Fiscal Year Ended August 31,
|  | 2015 |  | 2014 |  | 2013
Inside the U.S.A. to unaffiliated customers |  | $ | 19,329,979 |  |  | $ | 17,908,563 |  |  | $ | 16,027,619 |
Outside the U.S.A. to: |  |  |  |  |  |  |  |  |  |  |  |
Joint ventures in which the Company is a shareholder directly and indirectly |  |  | 3,240,980 |  |  |  | 3,348,158 |  |  |  | 2,952,612 |
Unaffiliated customers |  |  | 7,751,734 |  |  |  | 5,569,387 |  |  |  | 3,521,633 |
|  | $ | 30,322,693 |  |  | $ | 26,826,108 |  |  | $ | 22,501,864 |
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] |
|  | At August 31, 2015 |  | At August 31, 2014
Brazil |  | $ | 46,918 |  |  | $ | 115,726 |
India |  |  | 16,402 |  |  |  | 24,766 |
China |  |  | 45,220 |  |  |  | — |
North America |  |  | 7,184,623 |  |  |  | 6,337,495 |
Total long-lived assets |  | $ | 7,293,163 |  |  | $ | 6,477,987 |
Revenue from External Customers by Geographic Areas [Table Text Block] |
|  | Fiscal Year Ended August 31, 2015 |  | Fiscal Year Ended August 31, 2014 |  | Fiscal Year Ended August 31, 2013
Brazil |  | $ | 2,623,938 |  |  | $ | 3,079,695 |  |  | $ | 2,394,486 |
India |  |  | 967,241 |  |  |  | 581,535 |  |  |  | — |
China |  |  | 1,070,422 |  |  |  | — |  |  |  | — |
North America |  |  | 25,661,092 |  |  |  | 23,164,878 |  |  |  | 20,107,378 |
Total net sales |  | $ | 30,322,693 |  |  | $ | 26,826,108 |  |  | $ | 22,501,864 |

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