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v3.23.1

Subsequent Events - Additional Information (Details) - MASSACHUSETTS - Sublease Agreement $ in Millions | Feb. 02, 2023 USD ($) ft²
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Office and Laboratory Space |
Subsequent Event [Line Items] |
Sublease agreement, square feet space area in building | ft² | 17,729
Subsequent Event |
Subsequent Event [Line Items] |
Base rent payments to receive over sublease term | $ | $ 5.2
Sublease term | 36 months
Sublease expire date | Feb. 01, 2025

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- Definition Sublease expiration date. + References No definition available. + Details
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Namespace Prefix: | pyxs_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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- Definition Sublease term. + References No definition available. + Details
Name: | pyxs_SubleaseTerm
Namespace Prefix: | pyxs_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

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- Definition Area of land held. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | instant

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- Definition Amount of sublease income excluding finance and operating lease expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI https://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 + Details
Name: | us-gaap_SubleaseIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
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Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |