{"cik":1049606,"taxonomy":"us-gaap","tag":"OperatingLeaseLiabilityNoncurrent","label":"Operating Lease, Liability, Noncurrent","description":"Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.","entityName":"COMPX INTERNATIONAL INC","units":{"USD":[{"end":"2026-03-31","val":926000,"accn":"0001104659-26-055645","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-05","frame":"CY2026Q1I"}]}}