Commitments and Contingencies - (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Lease Payments Under Non-Cancelable Operating Leases

Future minimum lease payments under non-cancelable operating leases (with initial or remaining lease terms in excess of one year) as of December 31, 2017 are (in thousands):

Years ending December 31:
2018	$	146
2019	25
2020	—
2021	—
2022 and thereafter	—
Total minimum lease payments	$	171