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SHAREHOLDERS' EQUITY, Warrants (Details) - $ / shares | 12 Months Ended
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Aug. 31, 2021 | Aug. 31, 2020
SHAREHOLDERS' EQUITY [Abstract] |  |
Outstanding warrants to purchase common stock (in shares) | 92 |
Warrants exercise price (in dollars per share) | $ 1.80 |
Warrants expiration period | 6 months |
Warrants exercised (in shares) | 0 | 0

X
- Definition Period between issuance and expiration of outstanding warrant and right in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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Namespace Prefix: | pcyo_
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Balance Type: | na
Period Type: | duration

X
- Definition Number of warrants (or share units) exercised during the current period. + References No definition available. + Details
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Namespace Prefix: | pcyo_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | instant

X
- Definition Number of warrants or rights outstanding. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
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