XML 29 R15.htm IDEA: XBRL DOCUMENT
v3.24.3

Commitments and Contingencies | 9 Months Ended
--- | ---
Sep. 30, 2024
Commitments and Contingencies. |
Commitments and Contingencies | 9. Commitments and Contingencies Operating Lease In November 2019, the Company entered into a lease of office and laboratory space at 301 Binney Street in Cambridge, Massachusetts to be used as its new corporate headquarters (the “Lease”). The expiration date of the Lease was originally in August 2025 and included an option to extend the term by two years. The base rent under the original Lease was $6.9 million per year, subject to an annual increase of 3.5%, and the Company was subject to a free-rent period through mid-August 2020. Variable lease payments include the Company’s allocated share of costs incurred and expenditures made by the landlord in the operation and management of the building. The Lease included incentives of $14.1 million in the form of an allowance for tenant improvements related to the design and build out of the space. In connection with the Lease, the Company has secured a letter of credit for $2.3 million which renews automatically each year. The Lease commencement date, for accounting purposes, was reached in September 2020. ​ In May 2024, the Company entered into the First Amendment (the “Lease Amendment”) to the Lease to extend the term for approximately two years, commencing on August 19, 2025 (the “First Extension Term”) with the base rent to start at approximately $6.2 million per year, followed by a 3% annual increase. Pursuant to the Lease Amendment, the Company also has an option to extend the term of the Lease by five years, upon the expiration of the First Extension Term. ​ Other information related to the Lease is as follows (in thousands, except lease term and discount rate): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For Three Months Ended | ​ | For Nine Months Ended | ​
​ |  | September 30, |  | September 30, | ​
​ | ​ | 2024 | ​ | 2024 |
Lease Cost: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Operating lease cost | ​ | $ | 1,714 | ​ | $ | 5,290 | ​
Variable lease cost | ​ | ​ | 363 | ​ | ​ | 1,086 | ​
Total lease cost | ​ | $ | 2,077 | ​ | $ | 6,376 | ​
​
​ | ​ | ​ | ​
​ | For Nine Months Ended | ​
​ | September 30, | ​
​ | 2024 |
Other information: | ​ | ​ | ​
Operating cash flows used for operating leases | $ | 6,000 | ​
Weighted average remaining lease term | ​ | 2.9 | ​
Weighted average incremental borrowing rate | ​ | 13.1 | %
​ Legal Proceedings ​ The Company, from time to time, may be party to litigation arising in the ordinary course of its business. The Company was not subject to any material legal proceedings during the nine months ended September 30, 2024 and 2023. ​

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for commitments and contingencies. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 405 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/405-30/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 440 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482648/440-10-50-4 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/450/tableOfContent Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 954 -SubTopic 440 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478522/954-440-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 440 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482648/440-10-50-4 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 440 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/440/tableOfContent + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration