Lease Agreement - Leased facilities (Details)	12 Months Ended
Dec. 31, 2021 facility
Leased facilities, Emeryville, California
Leases
Operating leases, number of leased facilities	1

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_LesseeLeaseDescriptionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration