Accounts and Other Receivables, Net (Tables)

12 Months Ended

Dec. 31, 2018

Receivables [Abstract]

Schedule of Accounts Notes Loans and Financing Receivable

	December 31,
	2017			2018
	(in thousands)
Trade receivables - CompX	$	10,516		$	12,210
Accrued insurance recoveries		145			266
Other receivables		79			34
Allowance for doubtful accounts		(70	)		(70	)
Total	$	10,670		$	12,440