Accounts and Other Receivables, Net (Tables)

3 Months Ended

Mar. 31, 2021

Receivables [Abstract]

Schedule of Accounts Notes Loans and Financing Receivable

	December 31,			March 31,
	2020			2021
	(In thousands)
Trade receivables - CompX	$	10,801		$	16,928
Other receivables		393			340
Accrued insurance recoveries		18			10
Allowance for doubtful accounts		(70	)		(70	)
Total	$	11,142		$	17,208