Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Future Contractual Rental Payments for Non-Cancelable Operating Leases

At December 31, 2017, the future contractual rental payments for noncancelable operating leases for each of the following five years and thereafter are as follows (in thousands):

Year ending:
2018	$	2,309
2019	1,947
2020	1,963
2021	1,920
2022	1,530
Thereafter	4,533
Total payments due	$	14,202