Quarterly report pursuant to Section 13 or 15(d)

Leases - Additional Information (Detail)

v3.20.2
Leases - Additional Information (Detail)
$ in Thousands
1 Months Ended 9 Months Ended
Jun. 30, 2020
USD ($)
ft²
Jan. 31, 2019
USD ($)
ft²
Sep. 30, 2020
USD ($)
Dec. 31, 2019
USD ($)
Lessee Lease Description [Line Items]        
Operating lease right-of-use-asset     $ 11,589 $ 9,959
Operating lease, lease liability     14,866  
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    
Asset retirement obligation, lease     $ 400  
Texas | Letter of Credit        
Lessee Lease Description [Line Items]        
Letter of credit   $ 3,000    
New York        
Lessee Lease Description [Line Items]        
Area of land | ft² 9,289      
Area of land of additional facility lease agreement | ft² 3,000      
Lease expiration date Oct. 30, 2025      
New York | Letter of Credit        
Lessee Lease Description [Line Items]        
Letter of credit $ 200      
Minimum        
Lessee Lease Description [Line Items]        
Lessee, operating leases remaining lease term.     2 years  
Lessee, finance leases remaining lease term.     1 year  
Lessee, operating leases renewal lease term     3 years  
Maximum        
Lessee Lease Description [Line Items]        
Lessee, operating leases remaining lease term.     8 years  
Lessee, operating leases renewal lease term     5 years