Annual report pursuant to Section 13 and 15(d)

Lease Agreements - Sublease Agreements (Details)

v3.20.4
Lease Agreements - Sublease Agreements (Details) - Leased facilities, Berkeley, California
$ in Millions
12 Months Ended
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Nov. 30, 2019
facility
Leases      
Number of facilities for which a portion was subleased | facility     2
Sublease income | $ $ 0.0 $ 3.0