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Leases - Leases Details (Details) $ in Millions |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Nov. 14, 2018 USD ($) ft² item | Jul. 31, 2020 ft² item | Dec. 31, 2021 USD ($) ft² item | Dec. 31, 2020 item
Operating Leases |  |  |  |
Proceeds from tenant improvement allowance | $ |  |  | $ 12.7 |
Maximum |  |  |  |
Operating Leases |  |  |  |
Optional lease extension term |  |  | 10 years |
Domestic Office Leases |  |  |  |
Operating Leases |  |  |  |
The number of adjacent facilities rented |  |  | 2 |
Extended lease term |  | 5 years |  |
Number of lease renewal periods |  | 1 |  |
Optional lease extension term |  | 5 years |  |
Area of leased space | ft² |  | 98,000 |  |
Foreign Subsidiaries Office Leases |  |  |  |
Operating Leases |  |  |  |
Area of leased space | ft² |  |  | 14,000 |
Aliso Facility |  |  |  |
Operating Leases |  |  |  |
Number of properties leased | 1 |  |  |
Number of buildings leased | 3 |  |  |
Number of lease renewal periods | 2 |  |  |
Optional lease extension term | 5 years |  |  |
Area of leased space | ft² | 160,000 |  |  |
Tenant improvement allowance and abatement | $ | $ 12.7 |  |  |
Term of lease | 13 years |  |  |
Waltham Massachusetts Facility |  |  |  |
Operating Leases |  |  |  |
Area of leased space | ft² |  |  | 27,000 |
Burlington Massachusetts Facility |  |  |  |
Operating Leases |  |  |  |
Number of lease renewal periods |  |  |  | 1
Optional lease extension term |  |  |  | 5 years
Area of leased space | ft² |  |  | 60,000 |

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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 No definition available. + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918673-209980 + Details
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