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WATER AND LAND ASSETS, Service to Customers Not on the Lowry Range & O&G Leases (Details) | 12 Months Ended |  |  |  |  |
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Aug. 31, 2018 USD ($) a Connection | Aug. 31, 2011 a | Aug. 31, 2010 USD ($) a mi acre ft | Aug. 31, 2017 USD ($) | Jun. 30, 2017 USD ($) | Dec. 15, 2016 USD ($) | Nov. 30, 2015 a | Aug. 31, 2015 a
Service to Customers Not on the Lowry Range [Abstract] |  |  |  |  |  |  |  |
Area of land (in acres) | a | 931 |  |  |  |  |  | 700 | 14,600
Costs | $ 39,735,200 |  |  | $ 36,857,900 |  |  |  |
Sky Ranch Water Rights and Other Costs [Member] |  |  |  |  |  |  |  |
Service to Customers Not on the Lowry Range [Abstract] |  |  |  |  |  |  |  |
Area of land (in acres) | a |  |  | 931 |  |  |  |  |
Volume of water | acre ft |  |  | 830 |  |  |  |  |
Capitalized costs |  |  | $ 9,200,000 |  |  |  |  |
Length of pipeline | mi |  |  | 8 |  |  |  |  |
Costs | 8,514,100 |  | $ 6,725,000 | 6,725,000 |  |  |  |
Direct cost and fees for purchase of land and water |  |  | $ 554,100 |  |  |  |  |
Wild Pointe Service Rights [Member] |  |  |  |  |  |  |  |
Service to Customers Not on the Lowry Range [Abstract] |  |  |  |  |  |  |  |
Costs | $ 1,631,700 |  |  | 1,631,700 |  | $ 1,631,700 |  |
Percentage of wastewater tap fees recognized as income | 100.00% |  |  |  |  |  |  |
Percentage of remaining gross revenue retained | 98.00% |  |  |  |  |  |  |
Number of single family equivalent water connections | Connection | 200 |  |  |  |  |  |  |
Sky Ranch Pipeline [Member] |  |  |  |  |  |  |  |
Service to Customers Not on the Lowry Range [Abstract] |  |  |  |  |  |  |  |
Costs | $ 5,615,900 |  |  | $ 4,700,000 | $ 4,700,000 |  |  |
Anadarko E&P Company, L.P [Member] |  |  |  |  |  |  |  |
Oil and Gas Lease Payments [Abstract] |  |  |  |  |  |  |  |
Mineral estate area owned (in acres) | a |  | 634 |  |  |  |  |  |
Term period of lease |  | 3 years |  |  |  |  |  |
Bison Oil and Gas, LLP [Member] |  |  |  |  |  |  |  |
Oil and Gas Lease Payments [Abstract] |  |  |  |  |  |  |  |
Mineral estate area owned (in acres) | a | 40 |  |  |  |  |  |  |
Term period of lease | 3 years |  |  |  |  |  |  |

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