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Note 5 - Participating Interests in Export Water (Detail) - Potential Third Party Obligations (USD $) | 12 Months Ended
--- | ---
Aug. 31, 2012 | Aug. 31, 2011
Arapahoe County tap fees * | $ 34,522 |
Export Water Proceeds Received [Member] |  |
Original balances |  | 0
Acquisitions |  | 0
Option payments - Sky Ranch and The Hills at Sky Ranch |  | 110,400
Arapahoe County tap fees * |  | 532,968
Export Water sale payments | 26,163 | 85,123
Balance | 754,654 | 728,491
Initial Export Water Proceeds To Pure Cycle [Member] |  |
Original balances |  | 218,500
Acquisitions |  | 28,077,500
Option payments - Sky Ranch and The Hills at Sky Ranch |  | (42,280)
Arapahoe County tap fees * |  | (373,078)
Export Water sale payments | (18,314) | (59,585)
Balance | 27,802,743 | 27,821,057
Total Potential Third Party Obligation [Member] |  |
Original balances |  | 31,807,732
Acquisitions |  | (28,077,500)
Option payments - Sky Ranch and The Hills at Sky Ranch |  | (68,120)
Arapahoe County tap fees * |  | (159,890)
Export Water sale payments | (7,849) | (25,538)
Balance | 3,468,835 | 3,476,684
Participating Interests Liability [Member] |  |
Original balances |  | 11,090,630
Acquisitions |  | (9,789,983)
Option payments - Sky Ranch and The Hills at Sky Ranch |  | (23,754)
Arapahoe County tap fees * |  | (55,754)
Export Water sale payments | (3,304) | (8,907)
Balance | 1,208,928 | 1,212,232
Contingency [Member] |  |
Original balances |  | 20,717,102
Acquisitions |  | (18,287,517)
Option payments - Sky Ranch and The Hills at Sky Ranch |  | (44,366)
Arapahoe County tap fees * |  | (104,136)
Export Water sale payments | (4,545) | (16,631)
Balance | $ 2,259,907 | $ 2,264,452

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- Definition Export Water Sale Payments + References No definition available. + Details
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- Definition Payments made to holder of Tap Participation Fee liability upon the sale of water taps. + References No definition available. + Details
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Namespace Prefix: | pcyo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The cash outflow from the amount invested for projects in hopes of getting a future return or interest from it. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3213-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15, 17 -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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