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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Restricted Cash (Details) $ in Millions | 12 Months Ended
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Aug. 31, 2021 USD ($) LetterOfCredit
Restricted Cash [Abstract] |
Number of letters of credit | LetterOfCredit | 4
Letters of credit total | $ | $ 2.3

X
- Definition Total number of letters of credit entered in to by the company. + References No definition available. + Details
Name: | pcyo_NumberOfLettersOfCredit
Namespace Prefix: | pcyo_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_RestrictedCashAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration