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Note 4 - Long-Term Obligations and Operating Lease (Detail) - Potential Third Party Obligation (USD $) | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |
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Aug. 31, 2012 Acquisitions [Member] Initial Export Water Proceeds To Pure Cycle [Member] | Aug. 31, 2012 Acquisitions [Member] Total Potential Third Party Obligation [Member] | Aug. 31, 2012 Acquisitions [Member] Participating Interests Liability [Member] | Aug. 31, 2012 Acquisitions [Member] Contingency [Member] | Aug. 31, 2012 Option Payments [Member] Export Water Proceeds Received [Member] | Aug. 31, 2012 Option Payments [Member] Initial Export Water Proceeds To Pure Cycle [Member] | Aug. 31, 2012 Option Payments [Member] Total Potential Third Party Obligation [Member] | Aug. 31, 2012 Option Payments [Member] Participating Interests Liability [Member] | Aug. 31, 2012 Option Payments [Member] Contingency [Member] | Aug. 31, 2012 Arapahoe County Tap Fee [Member] Export Water Proceeds Received [Member] | Aug. 31, 2012 Arapahoe County Tap Fee [Member] Initial Export Water Proceeds To Pure Cycle [Member] | Aug. 31, 2012 Arapahoe County Tap Fee [Member] Total Potential Third Party Obligation [Member] | Aug. 31, 2012 Arapahoe County Tap Fee [Member] Participating Interests Liability [Member] | Aug. 31, 2012 Arapahoe County Tap Fee [Member] Contingency [Member] | Feb. 28, 2013 Export Water Sale Payments [Member] Export Water Proceeds Received [Member] | Aug. 31, 2012 Export Water Sale Payments [Member] Export Water Proceeds Received [Member] | Feb. 28, 2013 Export Water Sale Payments [Member] Initial Export Water Proceeds To Pure Cycle [Member] | Aug. 31, 2012 Export Water Sale Payments [Member] Initial Export Water Proceeds To Pure Cycle [Member] | Feb. 28, 2013 Export Water Sale Payments [Member] Total Potential Third Party Obligation [Member] | Aug. 31, 2012 Export Water Sale Payments [Member] Total Potential Third Party Obligation [Member] | Feb. 28, 2013 Export Water Sale Payments [Member] Participating Interests Liability [Member] | Aug. 31, 2012 Export Water Sale Payments [Member] Participating Interests Liability [Member] | Feb. 28, 2013 Export Water Sale Payments [Member] Contingency [Member] | Aug. 31, 2012 Export Water Sale Payments [Member] Contingency [Member] | Feb. 28, 2013 Export Water Proceeds Received [Member] | Aug. 31, 2012 Export Water Proceeds Received [Member] | Feb. 28, 2013 Initial Export Water Proceeds To Pure Cycle [Member] | Aug. 31, 2012 Initial Export Water Proceeds To Pure Cycle [Member] | Aug. 31, 2011 Initial Export Water Proceeds To Pure Cycle [Member] | Feb. 28, 2013 Total Potential Third Party Obligation [Member] | Aug. 31, 2012 Total Potential Third Party Obligation [Member] | Aug. 31, 2011 Total Potential Third Party Obligation [Member] | Feb. 28, 2013 Participating Interests Liability [Member] | Aug. 31, 2012 Participating Interests Liability [Member] | Aug. 31, 2011 Participating Interests Liability [Member] | Feb. 28, 2013 Contingency [Member] | Aug. 31, 2012 Contingency [Member] | Aug. 31, 2011 Contingency [Member]
Balance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 848,600 | $ 754,700 | $ 27,737,000 | $ 27,802,700 | $ 218,500 | $ 3,440,600 | $ 3,468,800 | $ 31,807,700 | $ 1,199,100 | $ 1,208,900 | $ 11,090,600 | $ 2,241,500 | $ 2,259,900 | $ 20,717,100
Activities | $ 28,077,500 | $ (28,077,500) | $ (9,790,000) | $ (18,287,500) | $ 110,400 | $ (42,300) | $ (68,100) | $ (23,800) | $ (44,300) | $ 533,000 | [1] | $ (373,100) | [1] | $ (159,900) | [1] | $ (55,800) | [1] | $ (104,100) | [1] | $ 93,900 | $ 111,300 | $ (65,700) | $ (77,900) | $ (28,200) | $ (33,400) | $ (9,800) | $ (12,100) | $ (18,400) | $ (21,300) |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | The Arapahoe County tap fees are less $34,522 in royalties paid to the Land Board.

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- Definition Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, collateralized financings, and capital lease obligations. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Period Type: | instant

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- Definition The net cash inflow or outflow in aggregate debt due to repayments and proceeds from additional borrowings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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