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Lease - Additional Information (Details) $ in Thousands	Aug. 17, 2023 USD ($) ft²	Dec. 15, 2020 USD ($) ft²	Sep. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)	Aug. 23, 2023 USD ($) ft²
Lease
Operating lease right-of-use assets			$ 1,419	$ 1,314
Lease liabilities			$ 1,478
Tennieh LLC
Lease
Area of property | ft²		9,800
Term of contract		5 years
Security deposit		$ 400
Expiration date		Jan. 31, 2027
Operating lease right-of-use assets		$ 800
Dropbox, Inc.
Lease
Area of property | ft²	6,713
Term of contract	2 years
Security deposit	$ 100
Expiration date	Dec. 31, 2026
Operating lease right-of-use assets	$ 100
Cambridge Redevelopment Authority
Lease
Area of property | ft²					4,020
Term of contract					3 years
Cambridge Redevelopment Authority | Minimum
Lease
Security deposit					$ 100

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Area of a real estate property.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 808
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479402/808-10-50-1

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- Definition

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

+ References

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-3

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Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479041/842-20-45-1

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479041/842-20-45-1

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- Definition

The amount of an asset, typically cash, provided to a counterparty to provide certain assurance of performance by the entity pursuant to the terms of a written or oral agreement, such as a lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(17))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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