A savings certificate entitling the Entity (that is, bearer) to receive interest at an established maturity date, based upon a fixed interest rate. A certificate of deposit may be issued in any denomination. Certificates of deposit are generally issued by commercial banks and, therefore, insured by the FDIC (up to the prescribed limit). Certificates of deposit generally restrict holders from withdrawing funds on demand without the incurrence of penalties. Generally, only certificates of deposit with original maturities of three months or less qualify as cash equivalents. Original maturity means original maturity to the entity holding the investment. As a related example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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Amount of expense incurred and directly related to generating revenue by lessor from operating lease of rented property and equipment.

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Date which lease or group of leases is set to expire, in YYYY-MM-DD format.

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Remaining lease term of operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

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Amount of lessee's right to use underlying asset under operating lease.

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Amount of cash equivalents restricted as to withdrawal or usage, classified as noncurrent. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of sublease income excluding finance and operating lease expense.

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Leases - Operating Leases - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Mar. 26, 2021	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	Mar. 31, 2023	Jun. 07, 2018
Operating Leases [Abstract]
Lease expiration date				Oct. 31, 2024
Total right-of-use asset		$ 4,551		$ 4,551		$ 3,901
Total lease liabilities		3,565		3,565		2,973	$ 200
Operating lease cost		300	$ 400	672	$ 742
Rent expense under operating leases		800	$ 500	1,400	$ 1,000
Restricted cash		1,362		1,362		1,372
Operating and Finance Leases [Member]
Operating Leases [Abstract]
Restricted cash		800		800		800
Renovacor, Inc. [Member]
Operating Leases [Abstract]
Rental income received under sublease agreements		$ 100		$ 200
Remaining lease term		1 year 3 months 18 days		1 year 3 months 18 days
Total right-of-use asset		$ 3,800		$ 3,800
Total lease liabilities		$ 3,600		$ 3,600
Hopewell, New Jersey and Cambridge [Member] \| Renovacor, Inc. [Member]
Operating Leases [Abstract]
Remaining lease term		10 years 3 months 18 days		10 years 3 months 18 days
ESB Lease Agreement [Member]
Operating Leases [Abstract]
Term of lease agreement								3 years
Letter of credit								$ 800
Lease expiration date				Sep. 30, 2027
Certificate of deposit		$ 800		$ 800		$ 800
ESB Lease Agreement Amendment [Member]
Operating Leases [Abstract]
Letter of credit		$ 800		$ 800
Lease expiration date	Jun. 30, 2024