Quarterly report pursuant to Section 13 or 15(d)

Leases - Additional Information (Detail)

v3.21.2
Leases - Additional Information (Detail)
$ in Thousands
 3 Months Ended 9 Months Ended
Feb. 04, 2020
ft²
Jan. 22, 2020
ft²
Sep. 30, 2021
USD ($)
ft²
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
ft²
Sep. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Lessee Lease Description [Line Items]              
Rent expense     $ 200 $ 100 $ 600 $ 500  
Operating lease, options to renew term     1 year   1 year    
Lessee, Operating Lease, Existence of Option to Extend [true false]         true    
Operating lease, right-of-use asset     $ 1,823   $ 1,823   $ 1,976
Operating lease, liability     $ 1,961   $ 1,961    
Corona Lease [Member]              
Lessee Lease Description [Line Items]              
Lease term   5 years          
Lease Expiration Date         Jun. 30, 2025    
Lease Commencement Date   Jul. 01, 2020          
Foothill Ranch [Member]              
Lessee Lease Description [Line Items]              
Lease term 66 months            
Lease Expiration Date         Dec. 31, 2025    
Lease Commencement Date Jul. 01, 2020            
Lease facility area | ft² 11,000            
Foothill Ranch [Member] | Corona Lease [Member]              
Lessee Lease Description [Line Items]              
Lease facility area | ft²   11,000 11,000   11,000    
Minimum              
Lessee Lease Description [Line Items]              
Lease term     1 year   1 year    
Maximum              
Lessee Lease Description [Line Items]              
Lease term     5 years   5 years    
Lease initial term of contract         1 year