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v3.22.1

Leases - Narrative (Details) $ in Thousands |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 19, 2020 USD ($) room | Mar. 31, 2022 USD ($) ft² item lease | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2021 USD ($)
Leases |  |  |  |  |
Number of operating leases | lease |  | 3 |  |  |
Number of new leases entered into during the period. | lease |  | 1 |  |  |
Operating lease, expense |  | $ 5,300 | $ 5,400 |  |
Finance lease liabilities- current |  | 1,772 |  |  | $ 3,000
Finance lease liabilities- noncurrent |  | 18,675 |  |  | $ 20,053
Aggregate rent, Initial term |  | 128,071 |  |  |
2022 (excludes the three months ended March 31, 2022) |  | 10,154 |  |  |
2023 |  | 13,298 |  |  |
Finance Lease, Right-of-Use Asset |  | 0 |  |  |
Research and development |  | 140,078 | 134,513 |  |
MassBio |  |  |  |  |
Leases |  |  |  |  |
Finance lease cost |  | $ 400 | $ 400 |  |
Written notice required for early lease termination | 24 months |  |  |  |
Number of dedicated rooms provided for gene therapy AADC program | room | 4 |  |  |  |
Guaranteed lease payment due at onset of the lease agreement | $ 15,000 |  |  |  |
Guaranteed lease payments due annually | 3,000 |  |  |  |
Present value of guaranteed lease payments | $ 41,400 |  |  |  |
Finance lease, term of contract | 12 years 6 months |  |  |  |
Research and development |  |  |  | $ 41,400 |
Minimum |  |  |  |  |
Leases |  |  |  |  |
Operating lease, term of contract |  | 1 month 6 days |  |  |
Maximum |  |  |  |  |
Leases |  |  |  |  |
Operating lease, term of contract |  | 13 years 3 months 18 days |  |  |
Renewal Term |  | 10 years |  |  |
New Building | Minimum |  |  |  |  |
Leases |  |  |  |  |
Area of real estate property | ft² |  | 75,000 |  |  |
Hopewell Campus |  |  |  |  |
Leases |  |  |  |  |
Operating lease, term of contract |  | 15 years |  |  |
Area of real estate property | ft² |  | 220,500 |  |  |
Renewal Term |  | 10 years |  |  |
Number of renewable terms | item |  | 2 |  |  |
Aggregate rent, Initial term |  | $ 111,500 |  |  |
Percent of market rate |  | 95.00% |  |  |
Mountain View |  |  |  |  |
Leases |  |  |  |  |
2022 (excludes the three months ended March 31, 2022) |  | $ 900 |  |  |
Thereafter |  | $ 0 |  |  |

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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 912 -SubTopic 730 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6472174&loc=d3e58812-109433 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 + Details
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