Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Schedule of future minimum lease commitments under non-cancelable leases

Future minimum lease commitments under non-cancelable leases are as follows as of December 31, 2017:

Year Ending December 31,	(in thousands)
2018	$	1,654
2019	38
2020	16
2021	—
Total	$	1,708