Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2019

Supplemental Cash Flow Elements [Abstract]

Schedule of Supplemental Cash Flow Information

		Years ended December 31,
		2019		2018		2017
	(In thousands)
Supplemental disclosure
Cash payments for:
Income tax paid		$	226	$	176	$	350
		$	226	$	176	$	350
Schedule for noncash operating activities
Adoption of ASC 842 leases - Operating leases		$	17,658	$	—	$	—
		$	17,658	$	—	$	—
Schedule for noncash investing activities
Unpaid property, plant, and equipment received		$	2,571	$	1,288	$	602
		$	2,571	$	1,288	$	602
Schedule for noncash financing activities
Conversion of VGH, LLC membership units to VGH, Inc. common stock		$	114,648	$	—	$	—
Unpaid transaction costs		$	4,875	$	—	$	—
Adoption of ASC 842 leases - Finance leases		430		—		—
		$	119,953	$	—	$	—