Lease Modification Fee Payable

No definition available.

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- Definition

Lessee, Operating Lease, Incremental Borrowing Rate

+ References

No definition available.

+ Details

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- Definition

Lessee, Operating Lease, Initial Rent-Free Period

+ References

No definition available.

+ Details

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- Definition

Lessee, Operating Lease, Lease Amendment, Accelerated Termination Period

+ References

No definition available.

+ Details

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- Definition

Number Of Lease Components

+ References

No definition available.

+ Details

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- Definition

Area of land held.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 970
-SubTopic 360
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-28(Column A)(Footnote 2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478979/970-360-S99-1

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- Definition

Amount of gain (loss) on termination of lease before expiration of lease term.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479092/842-20-40-1

+ Details

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- Definition

The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(4))
-Publisher FASB
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-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

+ Details

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- Definition

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/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
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-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-3

+ Details

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- Definition

Term of lessee's operating lease renewal, 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

+ Details

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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

+ Details

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- Definition

Amount of loss from impairment of right-of-use asset from operating lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 25
-Paragraph 6
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479365/842-20-25-6

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- Definition

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

+ Details

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- Definition

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

+ References

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-Topic 210
-SubTopic 10
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- Definition

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

+ References

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- Definition

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

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-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (a)
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- Definition

Amount of expense for research and development. Includes, but is not limited to, cost for computer software product to be sold, leased, or otherwise marketed and writeoff of research and development assets acquired in transaction other than business combination or joint venture formation or both. Excludes write-down of intangible asset acquired in business combination or from joint venture formation or both, used in research and development activity.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 985
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
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-Paragraph 1
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Commitments and Contingencies - Narrative (Details)	3 Months Ended		9 Months Ended		12 Months Ended
Commitments and Contingencies - Narrative (Details)	Sep. 30, 2026 USD ($) ft²	Sep. 30, 2025 USD ($)	Sep. 30, 2026 USD ($) ft²	Sep. 30, 2025 USD ($)	Dec. 31, 2025 USD ($)	Aug. 05, 2026 USD ($)	Dec. 22, 2025 USD ($) ft² leaseCompenent	Dec. 21, 2025 ft²	Sep. 01, 2023 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	$ 3,846,000		$ 3,846,000		$ 397,000
Lease liability	6,450,000		6,450,000
General and administrative	4,494,000	$ 4,596,000	13,041,000	$ 12,590,000
Research and development	11,434,000	$ 9,850,000	32,411,000	30,339,000
Operating lease liabilities, current portion	1,625,000		1,625,000		286,000
Operating lease liabilities, net of current portion	4,825,000		4,825,000		1,688,000
Impairment of right-of-use asset			89,000	$ 494,000
Office And Laboratory Space In Cambridge
Lessee, Lease, Description [Line Items]
Area of lease (approximately) \| ft²								30,000
Accelerated termination period							30 days
Lease liability						$ 0
Office And Laboratory Space In Watertown, Massachusetts
Lessee, Lease, Description [Line Items]
Area of lease (approximately) \| ft²							44,000
Renewal term							5 years
Number of lease components \| leaseCompenent							2
Operating lease right-of-use assets	3,400,000		3,400,000			3,500,000	$ 0
Lease liability						5,500,000	1,100,000
Gain on termination of lease					300,000
General and administrative					100,000
Research and development					$ 200,000
Lease modification fee							$ 2,100,000
Operating lease liabilities, current portion	1,100,000		1,100,000			800,000
Operating lease liabilities, net of current portion	$ 4,500,000		$ 4,500,000			$ 4,700,000
Initial rent-free period						18 months
Office And Laboratory Space In Boulder
Lessee, Lease, Description [Line Items]
Area of lease (approximately) \| ft²	5,300		5,300
Operating lease right-of-use assets	$ 200,000		$ 200,000						$ 1,400,000
Operating lease liabilities, current portion	300,000		300,000						200,000
Operating lease liabilities, net of current portion	$ 400,000		400,000						$ 1,200,000
Term of lease									5 years
Incremental borrowing rate used for lease									7.12%
Impairment of right-of-use asset			$ 100,000