Restricted Cash	12 Months Ended
Dec. 31, 2023
Restricted Cash and Cash Equivalents [Abstract]
Restricted Cash	5. Restricted cash The Company maintains standby letters of credit that are collateralized with a bank account at a financial institution in accordance with certain lease agreements. The aggregate amount of such standby letters of credit was $3.8 million and $10.5 million as of December 31, 2023 and 2022, respectively. The Company terminated the Fremont lease in the third quarter of 2023, and as a result, the Company’s letter of credit of $6.7 million related to the Fremont lease was returned to the Company and included in cash and cash equivalents.

Restricted Cash

12 Months Ended

Dec. 31, 2023

Restricted Cash and Cash Equivalents [Abstract]

5. Restricted cash

The Company maintains standby letters of credit that are collateralized with a bank account at a financial institution in accordance with certain lease agreements. The aggregate amount of such standby letters of credit was $3.8 million and $10.5 million as of December 31, 2023 and 2022, respectively. The Company terminated the Fremont lease in the third quarter of 2023, and as a result, the Company’s letter of credit of $6.7 million related to the Fremont lease was returned to the Company and included in cash and cash equivalents.