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Note 2 - Fair Value Measurements (Detail) - Changes in the Tap Participation Fee (USD $) |  |  | 6 Months Ended
--- | --- | --- | ---
Feb. 28, 2013 Gross Estimated Tap Participation Fee Liability [Member] | Aug. 31, 2012 Gross Estimated Tap Participation Fee Liability [Member] | Feb. 28, 2013 Tap Participation Fee Report Liability [Member] | Feb. 28, 2013 Discount To Be Imputed As Interest Expense In Future Periods [Member]
Balance at August 31, 2012 | $ 112,958,000 | $ 112,958,000 | $ 68,269,200 | $ 44,688,800
Imputed interest recorded as "Other Expense" |  |  | 1,544,800 | (1,544,800)
Balance at February 28, 2013 | $ 112,958,000 | $ 112,958,000 | $ 69,814,000 | $ 43,144,000

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | pcyo_ImputedInterestExpense
Namespace Prefix: | pcyo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition No authoritative reference available. + References No definition available. + Details
Name: | pcyo_TapParticipationFeeReportedLiability
Namespace Prefix: | pcyo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant