Leases - Summary of Operating Leases (Detail)
$ in Thousands
12 Months Ended
Dec. 31, 2016
USD ($)
Operating Leases Of Lessee [Line Items]  
Monthly Payment $ 100
Residual Value $ 1,454
Lease Inception, December 29, 2015 [Member]  
Operating Leases Of Lessee [Line Items]  
Lease Term 60 months
Monthly Payment $ 15
Residual Value $ 173
Lease Inception, January 19, 2016 [Member]  
Operating Leases Of Lessee [Line Items]  
Lease Term 60 months
Monthly Payment $ 37
Residual Value $ 639
Lease Inception, February 15, 2016 [Member]  
Operating Leases Of Lessee [Line Items]  
Lease Term 60 months
Monthly Payment $ 24
Residual Value $ 320
Lease Inception, March 3, 2016 [Member]  
Operating Leases Of Lessee [Line Items]  
Lease Term 60 months
Monthly Payment $ 24
Residual Value $ 322