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Note 3 - Investments in Water, Water Systems, Land and Improvements (Detail) - Costs and Accumulated Depreciation (USD $)
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Feb. 28, 2013
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Aug. 31, 2012
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| Costs | $ 90,628,400 | $ 90,505,700 |
| Accumulated Depreciation and Depletion | (2,143,400) | (1,995,300) |
| Net investments in water and water systems | 88,484,971 | 88,510,359 |
| Sky Ranch land and improvements, net | 3,773,300 | 3,778,500 |
| Total net investments in water, water systems, land and improvements | 92,258,300 | 92,288,900 |
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Arkansas River Valley Assets [Member]
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| Costs | 69,112,300 | 69,112,300 |
| Accumulated Depreciation and Depletion | (1,401,800) | (1,315,900) |
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Rangeview Water Supply [Member]
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| Costs | 14,496,400 | 14,376,100 |
| Accumulated Depreciation and Depletion | (7,400) | (7,100) |
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Sky Ranch Water Rights and Other Costs [Member]
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| Costs | 3,926,500 | 3,924,100 |
| Accumulated Depreciation and Depletion | (65,300) | (50,800) |
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Fairgrounds Water and Water System [Member]
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| Costs | 2,899,900 | 2,899,900 |
| Accumulated Depreciation and Depletion | (578,500) | (534,500) |
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Rangeview Water System [Member]
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| Costs | 167,700 | 167,700 |
| Accumulated Depreciation and Depletion | (70,100) | (67,600) |
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Water Supply - Other [Member]
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| Costs | 25,600 | 25,600 |
| Accumulated Depreciation and Depletion | $ (20,300) | $ (19,400) |