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v3.19.3

Subsequent Events - Warrants Exercised (Details) - Subsequent Event - Warrants to purchase common stock | 1 Months Ended
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Oct. 31, 2019 $ / shares shares
Subsequent Event [Line Items] |
Warrants exercised (in shares) | 482,661
Shares issued (in shares) | 441,307
Weighted Average |
Subsequent Event [Line Items] |
Exercise price (in dollars per share) | $ / shares | $ 1.59

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- Definition Class of Warrant or Right, Warrants Exercised + References No definition available. + Details
Name: | pgny_ClassOfWarrantOrRightWarrantsExercised
Namespace Prefix: | pgny_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Stock Issued During Period, Shares, Warrants Exercised + References No definition available. + Details
Name: | pgny_StockIssuedDuringPeriodSharesWarrantsExercised
Namespace Prefix: | pgny_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

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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: |

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- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=pgny_CommonStockWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_WeightedAverageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |