Annual report pursuant to Section 13 and 15(d)

Leases - Additional Information (Detail)

v3.20.4
Leases - Additional Information (Detail)
$ in Thousands
1 Months Ended
Jun. 30, 2020
USD ($)
ft²
Jan. 31, 2019
USD ($)
ft²
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Jan. 01, 2019
USD ($)
Dec. 31, 2018
USD ($)
Lessee Lease Description [Line Items]            
Operating lease right-of-use-asset     $ 11,104 $ 9,959 $ 4,180  
Operating lease, lease liability     14,423      
Asset retirement obligation, lease     1,490 $ 1,365   $ 344
Texas            
Lessee Lease Description [Line Items]            
Area of administrative office and research and development space leased | ft²   57,000        
Lease expiration period   2028-08        
Operating lease right-of-use-asset   $ 7,200        
Operating lease, lease liability   7,200        
Letter of credit   $ 3,000        
Asset retirement obligation, lease     $ 400      
New York            
Lessee Lease Description [Line Items]            
Letter of credit $ 200          
Area of land | ft² 9,289          
Area of land of additional facility lease agreement | ft² 3,000          
Lease expiration date Oct. 30, 2025