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v3.19.3

Convertible Preferred Stock - Non-cash Contribution (Details) $ in Thousands | 9 Months Ended
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Sep. 30, 2018 USD ($)
Temporary Equity Disclosure [Abstract] |
Non-cash contribution | $ 414

X
- Definition The amount of adjustments to additional paid in capital attributable to non-cash distribution during the period. + References No definition available. + Details
Name: | pgny_AdjustmentsToAdditionalPaidInCapitalNonCashDistribution
Namespace Prefix: | pgny_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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