Annual report pursuant to Section 13 and 15(d)

Leases - Additional Information (Details)

v3.20.4
Leases - Additional Information (Details) - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Lessee Lease Description [Line Items]      
Operating lease, option to extend options to extend the leases for up to 5 years.    
Operating lease, existence of option to extend [true false] true    
Rent expense, including short-term lease cost $ 2,864,000 $ 2,288,000 $ 1,638,000
Operating lease cost $ 2,622,000 2,269,000  
Corporate Headquarters in California      
Lessee Lease Description [Line Items]      
Annual percentage increase in rental expense 3.50%    
Lease payments annual increase description Lease payments for its corporate headquarters will increase annually by the lesser of the change, if any, in the Consumer Price Index of the Bureau of Labor Statistics of the U.S. Department of Labor or three and one-half percent (3.5%) at each annual adjustment date thereafter.    
Industrial Space in Texas      
Lessee Lease Description [Line Items]      
Annual percentage increase in rental expense 2.50%    
Lease payments annual increase description Lease payments for the Company’s industrial space in Texas will increase annually by two and one-half percent (2.5%) at each annual adjustment date thereafter.    
Property owned by a related party      
Lessee Lease Description [Line Items]      
Operating lease cost $ 33,000 $ 31,000 $ 33,000
Minimum      
Lessee Lease Description [Line Items]      
Operating leases, lease term 2 years    
Minimum | Corporate Headquarters in California and Industrial Space in Texas      
Lessee Lease Description [Line Items]      
Operating leases, lease term 10 years    
Additional operating lease cost $ 21,446,000    
Maximum      
Lessee Lease Description [Line Items]      
Operating leases, lease term 11 years    
Operating lease option to extend term 5 years