Revenue - Additional Information (Details) $ in Thousands	1 Months Ended	12 Months Ended
Revenue - Additional Information (Details) $ in Thousands	Dec. 31, 2019 Milestone	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Product and Service [Extensible List]		Collaboration Revenue [Member]	Collaboration Revenue [Member]
Collaboration revenue		$ 1,104	$ 975
Deferred revenue		$ 828	$ 498
Expected research term of arrangement completion		second half of 2022
Janssen \| Collaboration Agreement
Disaggregation Of Revenue [Line Items]
Number of collaboration milestones \| Milestone	3
Number of days which decide to next milestone	60 days

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details

Kaleido Biosciences, Inc. 10-K