Restricted Cash	3 Months Ended
Mar. 31, 2021
Restricted Cash And Cash Equivalents [Abstract]
Restricted Cash	6. Restricted cash As of March 31, 2021 and December 31, 2020, the Company maintained standby letters of credit of $2.1 million, which are collateralized with a bank account at a financial institution in accordance with the lease agreements.

The entire disclosure for assets that are restricted in their use, generally by contractual agreements or regulatory requirements. This would include, but not limited to, a description of the restricted assets and the terms of the restriction.

No definition available.

Name:	us-gaap_RestrictedAssetsDisclosureTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration