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v3.20.4

Leases (Details) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Dec. 17, 2020 USD ($) ft² | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Jan. 01, 2019 USD ($)
Lessee, Lease, Description [Line Items] |  |  |  |  |
Lease renewal term |  | 10 years |  |  |
Operating lease cost |  | $ 5,300 | $ 5,100 |  |
Variable lease cost |  | 1,400 | 1,100 |  |
Operating rental expense |  |  |  | $ 2,600 |
Total commitment under lease |  | $ 41,991 | $ 36,138 | $ 0 | $ 20,056
Richardson, Texas |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Leased area (sq ft) | ft² | 23,833 |  |  |  |
Total commitment under lease | $ 11,600 |  |  |  |
Minimum |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Lease term |  | 1 year |  |  |
Maximum |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Lease term |  | 11 years |  |  |

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