SEGMENT INFORMATION (Details) $ in Millions	9 Months Ended
May 31, 2018 USD ($) BusinessLine
SEGMENT INFORMATION [Abstract]
Number of business lines \| BusinessLine	2
Real estate inventory and reimbursable costs \| $	$ 3.7

Carrying amount as of the balance sheet date, net of valuation allowances and impairment losses, of costs of land expected to be developed in the near term and reimbursable costs.

No definition available.

Name:	pcyo_RealEstateInventoryAndReimbursableCosts
Namespace Prefix:	pcyo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant