v3.25.2
Cover - shares
 6 Months Ended
Jun. 30, 2025
Aug. 13, 2025
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Entity Interactive Data Current Yes  
Amendment Flag false  
Document Period End Date Jun. 30, 2025  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Entity Information [Line Items]    
Entity Registrant Name WRIGHT INVESTORS’ SERVICE HOLDINGS, INC.  
Entity Central Index Key 0001279715  
Entity File Number 000-50587  
Entity Tax Identification Number 13-4005439  
Entity Incorporation, State or Country Code DE  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Shell Company true  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Contact Personnel [Line Items]    
Entity Address, Address Line One 118 North Bedford Road  
Entity Address, Address Line Two Ste. 100  
Entity Address, City or Town Mount Kisco  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10549  
Entity Phone Fax Numbers [Line Items]    
City Area Code (914)  
Local Phone Number 242-5700  
Entity Listings [Line Items]    
Trading Symbol IWSH  
Security Exchange Name NONE  
Title of 12(g) Security Common Stock, $0.01 par value  
Entity Common Stock, Shares Outstanding   20,620,711