Supplemental Disclosure of Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2017

Supplemental Disclosure of Cash Flow Information

Schedule of supplemental disclosure of cash flow information

	Year Ended December 31,
	2017		2016		2015
	(In thousands)
Supplemental disclosure of cash flow information:
Cash paid for interest	$	42	$	72	$	93
Supplemental disclosure of non-cash financing and investing activities:
Non-cash property additions	$	150	$	425	$	123
Accrued financing transaction costs	$	17	$	166	$	—