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Note 10 - Segment Information (Detail) - Segment Reporting Information (USD $) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Feb. 28, 2013 | Feb. 29, 2012 | Feb. 28, 2013 | Feb. 29, 2012 | Aug. 31, 2012
Revenues | $ 434,505 | $ 49,972 | $ 872,923 | $ 117,531 |
Gross profit | 309,154 | 10,728 | 675,622 | 31,109 |
Depletion and depreciation | 54,300 |  | 156,070 | 155,210 |
Other significant noncash items: |  |  |  |  |
Stock-based compensation | 12,500 | 21,400 | 23,050 | 40,115 |
TPF interest expense | 650,107 | 862,400 | 1,544,755 | 1,713,800 |
Segment assets | 110,322,155 |  | 110,322,155 |  | 111,582,077
Expenditures for segment assets | 12,100 |  | 120,300 |  |
Wholesale Water and Wasterwater [Member] |  |  |  |  |
Revenues | 114,900 |  | 172,200 |  |
Gross profit | 16,200 |  | 21,000 |  |
Depletion and depreciation | 54,300 |  | 109,800 |  |
Other significant noncash items: |  |  |  |  |
TPF interest expense | 650,100 |  | 1,544,800 |  |
Segment assets | 96,254,200 |  | 96,254,200 |  |
Expenditures for segment assets | 12,100 |  | 120,300 |  |
Agricultural [Member] |  |  |  |  |
Revenues | 305,200 |  | 667,900 |  |
Gross profit | 278,600 |  | 621,800 |  |
Other significant noncash items: |  |  |  |  |
Segment assets | 3,586,900 |  | 3,586,900 |  |
All Other Segments [Member] |  |  |  |  |
Revenues | 14,400 |  | 32,800 |  |
Gross profit | 14,400 |  | 32,800 |  |
Other significant noncash items: |  |  |  |  |
Stock-based compensation | 12,500 |  | 23,100 |  |
Segment assets | $ 10,481,100 |  | $ 10,481,100 |  |

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