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Subsequent Events - Additional Information (Details) - Subsequent Event - Azzur | Jan. 21, 2022 USD ($)
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Subsequent Event [Line Items] |
Collaboration agreement description | On January 21, 2022, the Company entered into two Statements of Work with Azzur. Pursuant to the first of the SOWs (the Third SOW), the Company has agreed to pay Azzur $650,000 to renovate and upgrade the Azzur Suite for the Company’s expanded use. The second of the SOWs (the Fourth SOW) replaces the Second SOW that the Company entered into with Azzur on April 29, 2021. Pursuant to the Second SOW, the Company was granted access to, and use of, the Azzur Suite for a period of 20 months, from May 2021 to December 2022. The Fourth SOW extends the Second Term, for the period beginning January 2022 through March 2023 (the Third Term). The total estimated project cost during the Third Term for access to, and use of, the renovated and upgraded Azzur Suite, and the personnel support and other services, is $2.4 million.
First SOW |
Subsequent Event [Line Items] |
Agreed to pay renovation and upgradation fee | $ 650,000
Fourth SOW |
Subsequent Event [Line Items] |
Estimated project cost | $ 2,400,000

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- Definition Agreed to pay renovation and upgradation fee. + References No definition available. + Details
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Namespace Prefix: | sybx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Collaboration agreement description. + References No definition available. + Details
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Namespace Prefix: | sybx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Estimated project cost in access and use of renovated and upgraded under agreement. + References No definition available. + Details
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Namespace Prefix: | sybx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Data Type: | na
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- Details
Name: | srt_CounterpartyNameAxis=sybx_AzzurMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_ProductOrServiceAxis=sybx_FirstSOWMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_ProductOrServiceAxis=sybx_FourthSOWMember
Namespace Prefix: |
Data Type: | na
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