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Cover - shares
9 Months Ended
Sep. 30, 2025
Nov. 19, 2025
Cover [Abstract]    
Entity Registrant Name SENTINEL HOLDINGS LTD  
Entity Central Index Key 0000889353  
Document Type 10-Q  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Small Business true  
Entity Shell Company false  
Entity Emerging Growth Company false  
Entity Current Reporting Status No  
Document Period End Date Sep. 30, 2025  
Entity Filer Category Non-accelerated Filer  
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2025  
Entity Common Stock Shares Outstanding   9,506,429
Document Quarterly Report true  
Document Transition Report false  
Entity File Number 333-282424  
Entity Incorporation State Country Code NV  
Entity Tax Identification Number 95-4363944  
Entity Address Address Line 1 1793 Lafayette Street  
Entity Address Address Line 2 2nd Floor  
Entity Address City Or Town Santa Clara  
Entity Address State Or Province CA  
Entity Address Postal Zip Code 95050  
City Area Code 408  
Local Phone Number 750-0038  
Entity Interactive Data Current Yes