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Commitments and Contingencies - Narrative (Details) $ in Thousands |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2021 USD ($) building renewalOption ft² | Dec. 31, 2021 USD ($) building ft² | Dec. 31, 2020 USD ($) | Jan. 31, 2022 USD ($) | Jan. 01, 2020 USD ($) | Jul. 31, 2013
Guarantor Obligations |  |  |  |  |  |
Total minimum payments | $ 4,537 | $ 4,537 |  |  |  |
Operating lease right-of-use assets, net | 3,279 | 3,279 | $ 4,641 |  |  |
Operating lease liability | $ 4,096 | $ 4,096 |  |  |  |
Weighted average discount rate | 10.00% | 10.00% |  |  |  |
Weighted average remaining operating lease term (in years) |  |  | 3 years 9 months 18 days |  |  |
Rent expense |  | $ 2,700 | $ 2,900 |  |  |
Total minimum payments | $ 54,537 | 54,537 |  |  |  |
Subsequent Event | Standby Letters of Credit |  |  |  |  |  |
Guarantor Obligations |  |  |  |  |  |
Standby letter of credit amount |  |  |  | $ 3,000 |  |
Restricted Cash Noncurrent | Subsequent Event |  |  |  |  |  |
Guarantor Obligations |  |  |  |  |  |
Deposit with bank related to standby letter of credit, recorded as restricted cash |  |  |  | $ 3,000 |  |
Building |  |  |  |  |  |
Guarantor Obligations |  |  |  |  |  |
Operating lease liability | $ 49,200 | $ 49,200 |  |  |  |
Number of buildings | building | 2 | 2 |  |  |  |
Number of square feet of space | ft² | 158,221 | 158,221 |  |  |  |
Operating lease term (in months) | 122 months | 122 months |  |  |  |
Number of renewal options | renewalOption | 2 |  |  |  |  |
Operating lease renewal term (in years) | 5 years | 5 years |  |  |  |
Annual base rent year one | $ 4,300 | $ 4,300 |  |  |  |
Annual base rent year ten | 5,500 | 5,500 |  |  |  |
Receivable allowance for tenant improvements | 7,900 | 7,900 |  |  |  |
Cumulative Effect, Period of Adoption, Adjusted Balance | Accounting Standards Update 2016-02 |  |  |  |  |  |
Guarantor Obligations |  |  |  |  |  |
Operating lease right-of-use assets, net |  |  |  |  | $ 6,000 |
Operating lease liability |  |  |  |  | 7,400 |
Deferred rent obligation |  |  |  |  | $ 1,400 |
Redwood City, CA |  |  |  |  |  |
Guarantor Obligations |  |  |  |  |  |
Total minimum payments | $ 4,500 | $ 4,500 |  |  |  |
Operating lease term (in months) |  |  |  |  |  | 3 years

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