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Accounts and Other Receivables, Net (Tables)
12 Months Ended
Dec. 31, 2021
Receivables [Abstract]  
Schedule of Accounts Notes Loans and Financing Receivable

December 31, 

    

2020

    

2021

(In thousands)

Trade receivables - CompX

$

10,801

$

15,616

Accrued insurance recoveries

 

18

 

43

Other receivables

 

393

 

20

Allowance for doubtful accounts

 

(70)

 

(70)

Total

$

11,142

$

15,609