XML 15 R1.htm IDEA: XBRL DOCUMENT v3.24.0.1
Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Feb. 21, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Document Transition Report false    
Entity File Number 1-13905    
Entity Registrant Name COMPX INTERNATIONAL INC    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 57-0981653    
Entity Address, Address Line One 5430 LBJ Freeway    
Entity Address, Address Line Two Suite 1700    
Entity Address, City or Town Dallas    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 75240-2620    
City Area Code 972    
Local Phone Number 448-1400    
Title of 12(b) Security Class A common stock    
Trading Symbol CIX    
Security Exchange Name NYSEAMER    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 34.0
Entity Common Stock, Shares Outstanding   12,313,757  
Entity Central Index Key 0001049606    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Amendment Flag false    
Documents Incorporated by Reference

The information required by Part III is incorporated by reference from the Registrant’s definitive proxy statement to be filed with the Commission pursuant to Regulation 14A not later than 120 days after the end of the fiscal year covered by this report.

    
Auditor Name PricewaterhouseCoopers LLP    
Auditor Firm ID 238    
Auditor Location Dallas, Texas