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Description of Business and Summary of Significant Accounting Policies - Fixed Assets (Details) | 12 Months Ended
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Jun. 30, 2018
Computer equipment |
Property Plant And Equipment [Line Items] |
Percentage of annual amortization rate on declining balance (in hundredths) | 30.00%
Equipment |
Property Plant And Equipment [Line Items] |
Percentage of annual amortization rate on declining balance (in hundredths) | 20.00%

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- Definition Percentage of annual amortization rate on declining balance. + References No definition available. + Details
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Namespace Prefix: | pzg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_EquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |