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Restricted Cash
6 Months Ended
Jun. 30, 2022
Restricted Cash And Cash Equivalents [Abstract]  
Restricted Cash

5. Restricted cash

As of June 30, 2022 and December 31, 2021, the Company maintained standby letters of credit of $10.5 million and $8.8 million, respectively, which are collateralized with a bank account at a financial institution in accordance with the applicable lease agreements. The Company’s letter of credit related to the lease in Fremont, CA will reduce from $6.7 million to $0.5 million in July 2023.