Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Minimum Rental Commitments Under Non-Cancelable Operating Leases

Future minimum lease payments under operating and capital lease commitments, with lease terms in excess of one year subsequent to December 31, 2017, were as follows:

(in thousands)
2018	$	759
2019	627
2020	306
Thereafter	—
	$	1,692