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Leases | 12 Months Ended
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Dec. 31, 2021
Leases [Abstract] |
Leases | Leases The Company has operating leases for real estate. The Company does not have any finance leases. During the year ended December 31, 2021, the Company recorded $3,389 of additional right-of-use assets of which $2,359 related to two new leases that commenced during the period for its Menlo Park, California, U.S. and Sawston, U.K. locations and $1,030 which related to one lease that was extended during the period for its Oxfordshire, U.K location. The carrying value of the right-of-use assets as of December 31, 2021 and 2020 is $2,790 and $554, respectively. The elements of lease expense were as follows:
|  | Year Ended December 31, 2021 |  | Year Ended December 31, 2020 |
Lease Cost: |  |  |  |  |
Fixed lease costs |  | $ | 785 |  |  | $ | 478 |  |
Variable lease costs |  | 164 |  | 171 |
Short-term lease |  | 278 |  | 272 |
Total lease cost |  | $ | 1,227 |  |  | $ | 921 |  |
The weighted average discount rate and the weighted average remaining lease term were 2.5% and 3.9 years, respectively, as of December 31, 2021. The weighted average discount rate and the weighted average remaining lease term were 3.75% and 1.1 years, respectively, as of December 31, 2020. Future lease payments under non-cancelable leases as of December 31, 2021 are detailed as follows:
Year Ending December 31, |  | Amount |
2022 |  | $ | 1,037 |  |
2023 |  | 509 |  |
2024 |  | 508 |  |
2025 |  | 508 |  |
2026 |  | 386 |  |
Total lease payments |  | 2,948 |  |
Less: imputed interest |  | 166 |  |
Total operating lease liabilities |  | $ | 2,782 |  |
Total operating lease liabilities balance sheet presentation: |  |  |
Current lease liabilities |  | $ | 1,091 |  |
Non-current lease liabilities |  | 1,691 |  |
|  | $ | 2,782 |  |
Amounts presented above do not include payments related to the Company's Cambridge, Massachusetts, United States office where the lease term is month to month and therefore was not capitalized on the balance sheet.

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- Definition The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=77888251 + Details
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