Annual report pursuant to Section 13 and 15(d)

Lease Agreements - Leased facilities (Details)

v3.20.4
Lease Agreements - Leased facilities (Details)
$ in Millions
 12 Months Ended
Dec. 17, 2019
facility
Dec. 31, 2020
facility
Dec. 31, 2019
USD ($)
Dec. 18, 2019
facility
Leased facilities, Berkeley, California        
Leases        
Operating leases, number of leased facilities 2      
Number of operating leases terminated early       2
Early termination fee | $     $ 1.6  
Lease termination loss | $     $ 0.4  
Leased facilities, Emeryville, California        
Leases        
Operating leases, number of leased facilities   1