Leases - Additional Information (Detail) $ in Thousands |
1 Months Ended | ||||
|---|---|---|---|---|---|
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Feb. 18, 2025
USD ($)
ft²
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Feb. 28, 2025
USD ($)
|
Mar. 31, 2026
USD ($)
|
Jan. 31, 2026
USD ($)
|
Apr. 30, 2025
USD ($)
|
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| Lessee Lease Description [Line Items] | |||||
| Operating lease, options to extend | Company has an option to extend the Tech Square Lease for an additional term of five years. | ||||
| Undiscounted future operating lease payments | $ | $ 16,349 | ||||
| Winter Street Lease [Member] | |||||
| Lessee Lease Description [Line Items] | |||||
| Operating lease, description | In February 2025, the Company entered into a Second Amendment (the “Winter Street Amendment”) which will terminate the lease entered into by the Company in 2022 for space at 840 Winter Street, Waltham | ||||
| Operating lease, modification payments | $ | $ 78,000 | $ 34,000 | $ 14,000 | $ 30,000 | |
| Tech Square Lease [Member] | |||||
| Lessee Lease Description [Line Items] | |||||
| Area of space leased | ft² | 125,000 | ||||
| Area of space leased expandable | ft² | 23,000 | ||||
| Operating lease rent per square foot | ft² | 108 | ||||
| Operating lease percentage of annual increase | 3.00% | ||||
| Operating lease, option to extend | In addition, the Tech Square Lease will expand to include an additional 23,000 square feet of office and laboratory space at 400 Tech Square representing the 5th floor (the “Additional Tech Square Premises”) when such space becomes available. | ||||
| Tenant improvement allowances per square foot | ft² | 410 | ||||
| Undiscounted future operating lease payments | $ | 189,100 | ||||
| Prepaid Rent | $ | $ 52,500 | ||||
| Tech Square Lease [Member] | Maximum [Member] | |||||
| Lessee Lease Description [Line Items] | |||||
| Operating lease, term of contract | 12 years | ||||
| Tech Square Lease [Member] | Minimum [Member] | |||||
| Lessee Lease Description [Line Items] | |||||
| Operating lease, term of contract | 3 months |