Basis of Presentation (Tables)

9 Months Ended

Sep. 30, 2018

Basis of Presentation [Abstract]

Schedule of cash flow, supplemental disclosures

The following table presents certain supplementary cash flows information for the nine months endedSeptember 30, 2018 and 2017:

	Nine Months Ended September 30, 2018
(In thousands)	2018		2017
Supplementary Cash Flows information:
Warrants exercised for common stock	$	3,538	$	—
Interest paid (net of interest capitalized)	1,161		691
Shares converted to common from preferred stock	—		38,389
Additions to equipment in process included in accounts payable	191		486