Annual report pursuant to Section 13 and 15(d)

Restructuring Charges (Details)

v3.20.1
Restructuring Charges (Details)
$ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended 24 Months Ended
Oct. 24, 2018
facility
May 01, 2018
facility
Dec. 26, 2017
facility
Jan. 31, 2019
facility
Dec. 31, 2018
USD ($)
Sep. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Dec. 31, 2019
USD ($)
Dec. 17, 2019
facility
Dec. 31, 2018
USD ($)
Dec. 31, 2016
facility
Dec. 31, 2017
employee
Restructuring Charges                        
Restructuring liability, current         $ 84         $ 84    
Restructuring         543 $ 909 $ 459     1,911    
Leased facilities, Berkeley, California                        
Restructuring Charges                        
Operating leases, number of leased facilities | facility 3 3 3 3         2   2  
Sublease loss             $ 600          
Lease-related Costs                        
Restructuring Charges                        
Restructuring               $ 0        
Lease-related Costs | Accrued and other liabilities                        
Restructuring Charges                        
Restructuring liability, current         1,400         1,400    
Lease-related Costs | Other liabilities, Non-current                        
Restructuring Charges                        
Restructuring liability, noncurrent         $ 300         300    
2017 and 2016 Restructuring                        
Restructuring Charges                        
Number of employees terminated | employee                       62
2017 and 2016 Restructuring | Lease-related Costs                        
Restructuring Charges                        
Restructuring                   $ 1,900