Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Schedule of Aggregate Future Non-Cancelable Minimum Lease Payments

As of December 31, 2017, the aggregate future non-cancelable minimum lease payments associated with these operating leases are as follows:

Years Ending December 31:	Operating Leases
	(in thousands)
2018	$	424
2019		272
2020		225
2021		229
2022		183
Total(a)	$	1,333

(a) Minimum lease payments have not been reduced by total minimum sublease rentals of $0.2 million due in the future under sublease.