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Leases - Corporate Headquarters Lease (Details) $ in Millions | Sep. 30, 2021 USD ($)
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Lessee, Operating Lease, Description [Abstract] |
Operating lease, base rent per annum, through year five | $ 1.3
Operating lease, base rent per annum, after year five | $ 1.4

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- Definition Operating Lease, Base Rent Per Annum, After Year Five + References No definition available. + Details
Name: | pgny_OperatingLeaseBaseRentPerAnnumAfterYearFive
Namespace Prefix: | pgny_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Operating Lease, Base Rent Per Annum, Through Year Five + References No definition available. + Details
Name: | pgny_OperatingLeaseBaseRentPerAnnumThroughYearFive
Namespace Prefix: | pgny_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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