XML 13 R5.htm IDEA: XBRL DOCUMENT
v3.26.1

Condensed Consolidated Statements of Operations and Comprehensive (Loss) Income (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
SPN [Member] |  |  |  |
Reimbursement received | $ 0 | $ 3,490 | $ 0 | $ 9,799

X
- Definition Reimbursement received from related party. + References No definition available. + Details
Name: | mcrb_ReimbursementReceivedFromRelatedParty
Namespace Prefix: | mcrb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=mcrb_SpnMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |