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Commitments and Contingencies - Narrative (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 ft² lease | Dec. 31, 2021 USD ($) ft² | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Operating Leased Assets [Line Items] |  |  |  |
Lessee, operating lease, area of land under lease | 13,500 |  |  |
Lease, cost | $ |  | $ 3.4 | $ 3.4 | $ 3.2
Number of lease agreements entered into | lease | 2 |  |  |
Minimum purchase obligation | $ |  | $ 47.4 |  |
Minimum |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Operating lease, remaining lease term |  | 1 year 10 months 24 days |  |
Maximum |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Operating lease, remaining lease term |  | 8 years |  |
San Diego, California |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Lessee, operating lease, area of land under lease |  | 82,200 |  |
Plymouth Meeting, Pennsylvania |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Lessee, operating lease, area of land under lease |  | 57,360 |  |

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