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INVESTMENTS IN WATER, WATER SYSTEMS, LAND AND IMPROVEMENTS (Details) (USD $) | Nov. 30, 2014 | Aug. 31, 2014
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Costs | $ 94,444,700 us-gaap_PropertyPlantAndEquipmentGross | $ 93,293,300 us-gaap_PropertyPlantAndEquipmentGross
Accumulated Depreciation and Depletion | (2,543,700)us-gaap_PropertyPlantAndEquipmentOtherAccumulatedDepreciation | (2,469,400)us-gaap_PropertyPlantAndEquipmentOtherAccumulatedDepreciation
Net investments in water and water systems | 91,901,001 us-gaap_PropertyPlantAndEquipmentNet | 90,823,916 us-gaap_PropertyPlantAndEquipmentNet
Arkansas River Valley Assets |  |
Costs | 67,746,400 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_ArkansasRiverValleyAssetsMember | 67,746,400 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_ArkansasRiverValleyAssetsMember
Accumulated Depreciation and Depletion | (1,488,600)us-gaap_PropertyPlantAndEquipmentOtherAccumulatedDepreciation / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_ArkansasRiverValleyAssetsMember | (1,488,600)us-gaap_PropertyPlantAndEquipmentOtherAccumulatedDepreciation / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_ArkansasRiverValleyAssetsMember
Rangeview Water Supply |  |
Costs | 14,444,600 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_RangeviewWaterSupplyMember | 14,444,600 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_RangeviewWaterSupplyMember
Accumulated Depreciation and Depletion | (8,500)us-gaap_PropertyPlantAndEquipmentOtherAccumulatedDepreciation / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_RangeviewWaterSupplyMember | (8,400)us-gaap_PropertyPlantAndEquipmentOtherAccumulatedDepreciation / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_RangeviewWaterSupplyMember
Sky Ranch Water Rights And Other Costs |  |
Costs | 6,548,000 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_SkyRanchWaterRightsAndOtherCostsMember | 6,004,000 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_SkyRanchWaterRightsAndOtherCostsMember
Accumulated Depreciation and Depletion | (117,800)us-gaap_PropertyPlantAndEquipmentOtherAccumulatedDepreciation / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_SkyRanchWaterRightsAndOtherCostsMember | (93,000)us-gaap_PropertyPlantAndEquipmentOtherAccumulatedDepreciation / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_SkyRanchWaterRightsAndOtherCostsMember
Fairgrounds Water And Water System |  |
Costs | 2,899,900 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_FairgroundsWaterAndWaterSystemMember | 2,899,900 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_FairgroundsWaterAndWaterSystemMember
Accumulated Depreciation and Depletion | (732,700)us-gaap_PropertyPlantAndEquipmentOtherAccumulatedDepreciation / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_FairgroundsWaterAndWaterSystemMember | (710,600)us-gaap_PropertyPlantAndEquipmentOtherAccumulatedDepreciation / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_FairgroundsWaterAndWaterSystemMember
Rangeview Water System |  |
Costs | 1,148,200 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_RangeviewWaterSystemMember | 1,148,200 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_RangeviewWaterSystemMember
Accumulated Depreciation and Depletion | (79,300)us-gaap_PropertyPlantAndEquipmentOtherAccumulatedDepreciation / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_RangeviewWaterSystemMember | (77,900)us-gaap_PropertyPlantAndEquipmentOtherAccumulatedDepreciation / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_RangeviewWaterSystemMember
Water Supply Other |  |
Costs | 1,657,600 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_WaterSupplyOtherMember | 1,050,200 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_WaterSupplyOtherMember
Accumulated Depreciation and Depletion | $ (116,800)us-gaap_PropertyPlantAndEquipmentOtherAccumulatedDepreciation / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_WaterSupplyOtherMember | $ (90,900)us-gaap_PropertyPlantAndEquipmentOtherAccumulatedDepreciation / us-gaap_PropertyPlantAndEquipmentByTypeAxis = pcyo_WaterSupplyOtherMember

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