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Note 12 - Geographic and Segment Information (Tables) | 6 Months Ended
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Feb. 28, 2015
Note 12 - Geographic and Segment Information (Tables) [Line Items] |
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block] |
|  | Three Months Ended |  |  | Six Months Ended |
|  | February 28, 2015 |  |  | February 28, 2014 |  |  | February 28, 2015 |  |  | February 28, 2014 |
Inside the U.S.A. to unaffiliated customers |  |  | 61.4 | % |  |  | 62.1 | % |  |  | 64.3 | % |  |  | 66.6 | %
Outside the U.S.A to: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Joint ventures in which the Company is a shareholder directly and indirectly |  |  | 16.9 | % |  |  | 12.9 | % |  |  | 14.1 | % |  |  | 11.7 | %
Unaffiliated customers |  |  | 21.7 | % |  |  | 25.0 | % |  |  | 21.6 | % |  |  | 21.7 | %
|  |  | 100.0 | % |  |  | 100.0 | % |  |  | 100.0 | % |  |  | 100.0 | %
Reconciliation of Revenue from Segments to Consolidated [Table Text Block] |
|  | Three Months Ended |  |  | Six Months Ended |
|  | February 28, 2015 |  |  | February 28, 2014 |  |  | February 28, 2015 |  |  | February 28, 2014 |
ZERUST® sales |  | $ | 5,783,985 |  |  | $ | 5,555,051 |  |  | $ | 12,022,056 |  |  | $ | 11,304,064 |
Natur-Tec™ sales |  |  | 944,724 |  |  |  | 663,957 |  |  |  | 1,920,748 |  |  |  | 1,224,044 |
Total net sales |  | $ | 6,728,709 |  |  | $ | 6,219,008 |  |  | $ | 13,942,804 |  |  | $ | 12,528,108 |
Reconciliation of Cost of Good Sold from Segments to Consolidated [Table Text Block] |
|  | Three Months Ended |  |  | Six Months Ended |
|  | February 28, 2015 |  |  | % of Product Sales* |  |  | February 28, 2014 |  |  | % of Product Sales* |  |  | February 28, 2015 |  |  | % of Product Sales* |  |  | February 28, 2014 |  |  | % of Product Sales* |
Direct cost of goods sold |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ZERUST® |  | $ | 3,171,103 |  |  |  | 54.8 | % |  | $ | 2,965,790 |  |  |  | 53.4 | % |  | $ | 6,509,691 |  |  |  | 54.1 | % |  | $ | 6,047,554 |  |  |  | 53.5 | %
Natur-Tec® |  |  | 719,048 |  |  |  | 76.1 | % |  |  | 490,573 |  |  |  | 73.9 | % |  |  | 1,501,623 |  |  |  | 78.2 | % |  |  | 940,037 |  |  |  | 76.8 | %
Indirect cost of goods sold |  |  | 767,589 |  |  |  | — |  |  |  | 595,470 |  |  |  | — |  |  |  | 1,453,037 |  |  |  | — |  |  |  | 1,222,273 |  |  |  | — |
Total net cost of goods sold |  | $ | 4,657,740 |  |  |  |  |  |  | $ | 4,051,833 |  |  |  |  |  |  | $ | 9,464,351 |  |  |  |  |  |  | $ | 8,209,864 |  |  |  |  |
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] |
|  | As of February 28, 2015 |  |  | As of August 31, 2014 |
Brazil |  | $ | 1,065,105 |  |  | $ | 1,429,054 |
China |  |  | 1,268,072 |  |  |  | — |
India |  |  | 359,992 |  |  |  | 363,894 |
United States |  |  | 47,411,333 |  |  |  | 52,264,827 |
Total assets |  | $ | 50,104,502 |  |  | $ | 54,057,775 |
Revenue from External Customers by Geographic Areas [Table Text Block] |
|  | Six Months Ended |
|  | February 28, 2015 |  |  | February 28, 2014 |
Brazil |  | $ | 1,418,236 |  |  | $ | 1,153,012 |
China |  |  | 20,732 |  |  |  | — |
India |  |  | 416,772 |  |  |  | 168,779 |
United States |  |  | 12,087,064 |  |  |  | 11,206,317 |
Total net sales |  | $ | 13,942,804 |  |  | $ | 12,528,108 |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
|  | Six Months Ended |
|  | February 28, 2015 |  |  | February 28, 2014 |
Brazil |  | $ | (41,559 | ) |  | $ | (145,955 | )
China |  |  | (358,168 | ) |  |  | — |
India |  |  | (9,246 | ) |  |  | 5,800 |
United States |  |  | 2,184,424 |  |  |  | 3,307,688 |
Total operating income |  | $ | 1,775,451 |  |  | $ | 3,167,533 |
Fees For Services Provided to Joint Ventures [Member] |
Note 12 - Geographic and Segment Information (Tables) [Line Items] |
Reconciliation of Revenue from Segments to Consolidated [Table Text Block] |
|  | Three Months Ended |
|  | February 28, 2015 |  |  | % of Total Fees for Services Provided to Joint Ventures |  |  | February 28, 2014 |  |  | % of Total Fees for Services Provided to Joint Ventures |
Germany |  | $ | 202,633 |  |  |  | 20.4 | % |  | $ | 263,556 |  |  |  | 12.8 | %
Thailand |  |  | 156,519 |  |  |  | 15.7 | % |  |  | 130,441 |  |  |  | 6.3 | %
Japan |  |  | 124,202 |  |  |  | 12.5 | % |  |  | 167,410 |  |  |  | 8.2 | %
Poland |  |  | 116,612 |  |  |  | 11.7 | % |  |  | 152,518 |  |  |  | 7.4 | %
United Kingdom |  |  | 115,000 |  |  |  | 11.6 | % |  |  | 79,935 |  |  |  | 3.9 | %
France |  |  | 76,518 |  |  |  | 7.7 | % |  |  | 122,972 |  |  |  | 6.0 | %
India |  |  | 73,971 |  |  |  | 7.4 | % |  |  | 166,858 |  |  |  | 8.1 | %
Sweden |  |  | 72,297 |  |  |  | 7.3 | % |  |  | 92,223 |  |  |  | 4.5 | %
Finland |  |  | 52,693 |  |  |  | 5.3 | % |  |  | 76,537 |  |  |  | 3.7 | %
China |  |  | — |  |  |  | 0.0 | % |  |  | 523,451 |  |  |  | 25.4 | %
Other |  |  | 4,415 |  |  |  | 0.4 | % |  |  | 281,770 |  |  |  | 13.7 | %
|  | $ | 994,860 |  |  |  | 100.0 | % |  | $ | 2,057,671 |  |  |  | 100.0 | %
|  | Six Months Ended |
|  | February 28, 2015 |  |  | % of Total Fees for Services Provided to Joint Ventures |  |  | February 28, 2014 |  |  | % of Total Fees for Services Provided to Joint Ventures |
Germany |  |  | 440,954 |  |  |  | 14.1 | % |  |  | 527,111 |  |  |  | 12.6 | %
Thailand |  |  | 297,152 |  |  |  | 9.5 | % |  |  | 282,999 |  |  |  | 6.8 | %
Japan |  |  | 284,544 |  |  |  | 9.1 | % |  |  | 340,691 |  |  |  | 8.2 | %
Poland |  |  | 287,836 |  |  |  | 9.2 | % |  |  | 317,085 |  |  |  | 7.6 | %
United Kingdom |  |  | 211,371 |  |  |  | 6.8 | % |  |  | 154,632 |  |  |  | 3.7 | %
France |  |  | 209,898 |  |  |  | 6.7 | % |  |  | 251,075 |  |  |  | 6.0 | %
India |  |  | 143,262 |  |  |  | 4.6 | % |  |  | 166,858 |  |  |  | 4.0 | %
Sweden |  |  | 159,217 |  |  |  | 5.1 | % |  |  | 202,193 |  |  |  | 4.8 | %
Finland |  |  | 146,215 |  |  |  | 4.7 | % |  |  | 181,740 |  |  |  | 4.4 | %
China |  | $ | 516,139 |  |  |  | 16.5 | % |  | $ | 1,111,633 |  |  |  | 26.7 | %
Other |  |  | 431,942 |  |  |  | 13.7 | % |  |  | 631,302 |  |  |  | 15.2 | %
|  | $ | 3,128,530 |  |  |  | 100.0 | % |  | $ | 4,167,319 |  |  |  | 100.0 | %

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