Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments

Future minimum rental payments at December 31, 2018 are as follows:

	(In thousands)
2019	$	736
2020	—
2021	—
2022	—
2023	—
Thereafter	—
Total	$	736

Schedule of Future Minimum Commitments

The estimable future commitments under these volume commitment agreements at December 31, 2018 are as follows:

	(In thousands)
2019	$	2,948
2020	2,481
2021	2,663
2022	402
2023	—
Thereafter	1,654
Total	$	10,148