Cabaletta Bio, Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Commitments and Contingencies - Additional Information (Details)

v3.22.0.1

Commitments and Contingencies - Additional Information (Details) - USD ($)	1 Months Ended		3 Months Ended	12 Months Ended
	Feb. 28, 2022	Jan. 31, 2021	Oct. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Commitments and Contingencies [Line Items]
Research and development expense				$ 32,494,000	$ 21,376,000
Loss related to litigation settlement accrued				$ 0
Operating Lease Agreement
Commitments and Contingencies [Line Items]
Operating lease, description				The lease term commenced in May 2019 and will expire in July 2022.
Lease commencement period				2019-05
Lease expiration period				2022-07
Initial annual base rent				$ 261,000
Percentage of annual increase of base rent				2.00%
Rent expense				$ 272,000	266,000
Operating Lease Agreement \| Subsequent Event
Commitments and Contingencies [Line Items]
Lease expiration period	2025-06
Initial annual base rent	$ 279,000
Percentage of annual increase of base rent	2.50%
Lease Amendment Period	35 months
Wuxi Agreement \| WuXi Advanced Therapies
Commitments and Contingencies [Line Items]
Lease expiration period				2024-01
Rent expense				$ 480,000
Monthly fee included in minimum lease payment		$ 125,000
Early termination fee		$ 1,500,000
Research Service Agreement \| Children's Hospital of Philadelphia
Commitments and Contingencies [Line Items]
Research and development expense				1,071,000	$ 0
Accrued liability related to agreement				646,000
Research Service Agreement \| Children's Hospital of Philadelphia \| Accrued and Other Current Liabilities
Commitments and Contingencies [Line Items]
Accrued liability related to agreement				166,000
Agreement with Contract Manufacturing Organization
Commitments and Contingencies [Line Items]
Total cost			$ 1,620,000
Expense related to agreement				1,310,000
Agreement with Contract Manufacturing Organization \| Accrued and Other Current Liabilities
Commitments and Contingencies [Line Items]
Accrued liability related to agreement				$ 827,000

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