Annual report pursuant to Section 13 and 15(d)

Leases - Additional Information (Detail)

v3.20.1
Leases - Additional Information (Detail)
$ in Thousands
1 Months Ended
Jan. 31, 2019
USD ($)
ft²
Dec. 31, 2019
USD ($)
Jan. 01, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Lessee Lease Description [Line Items]          
Operating lease right-of-use-asset   $ 9,959 $ 4,180 $ 0  
Operating lease, lease liability   13,365      
Asset retirement obligation, lease   1,365   $ 344 $ 261
Texas          
Lessee Lease Description [Line Items]          
Area of land of additional facility lease agreement | ft² 57,000        
Lease expiration period 2028-08        
Operating lease right-of-use-asset $ 7,200        
Operating lease, lease liability 7,200 7,400      
Asset retirement obligation, lease   $ 400      
Texas | Letter of Credit          
Lessee Lease Description [Line Items]          
Letter of credit $ 3,000