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v3.19.3

Significant Accounting Policies - Revenue Recognition (Details) | 9 Months Ended
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Sep. 30, 2019
Accounting Policies [Abstract] |
Contract term | 3 years
Contract termination, notice period, low end of range | 30 days
Contract termination, notice period, high end of range | 90 days

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- Definition Contract Term + References No definition available. + Details
Name: | pgny_ContractTerm
Namespace Prefix: | pgny_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Contract Termination, Notice Period, High End of Range + References No definition available. + Details
Name: | pgny_ContractTerminationNoticePeriodHighEndOfRange
Namespace Prefix: | pgny_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Contract Termination, Notice Period, Low End of Range + References No definition available. + Details
Name: | pgny_ContractTerminationNoticePeriodLowEndOfRange
Namespace Prefix: | pgny_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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