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Leases - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Lessor and Lessee Lease Description [Line Items]        
Operating lease, option to extend, existence     true  
Operating lease, option to terminate, existence     true  
Short-term lease cost $ 5 $ 100 $ 14,000 $ 300
Variable lease cost 100 $ 300 300 $ 400
Operating lease payments, option to extend $ 500   $ 500  
Minimum [Member]        
Lessor and Lessee Lease Description [Line Items]        
Operating lease, remaining lease terms     1 month  
Operating lease, options to terminate term     3 months  
Maximum [Member]        
Lessor and Lessee Lease Description [Line Items]        
Operating lease, remaining lease terms     5 years  
Operating lease, renewal term 9 years   9 years  
Lessor sales-type lease arrangement terms for network equipment 5 years   5 years