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v3.22.4

Subsequent Events (Details) - Subsequent Event | Jan. 13, 2023
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Subsequent Event [Line Items] |
Annual base salary multiplier for severance | 1.25
COBRA continuation coverage period | 15 months

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- Definition Severance Costs, Annual Base Salary Multiplier + References No definition available. + Details
Name: | prm_SeveranceCostsAnnualBaseSalaryMultiplier
Namespace Prefix: | prm_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

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- Definition Severance Costs, COBRA Continuation Coverage, Period + References No definition available. + Details
Name: | prm_SeveranceCostsCOBRAContinuationCoveragePeriod
Namespace Prefix: | prm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |