v3.25.1
Cover - shares
 3 Months Ended
Mar. 31, 2025
May 20, 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 Mar. 31, 2025  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q1  
Entity Information [Line Items]    
Entity Registrant Name OSR HOLDINGS, INC.  
Entity Central Index Key 0001840425  
Entity File Number 001-41390  
Entity Tax Identification Number 84-5052822  
Entity Incorporation, State or Country Code DE  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Shell Company false  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Contact Personnel [Line Items]    
Entity Address, Address Line One 10900 NE 4th Street  
Entity Address, Address Line Two Suite 2300  
Entity Address, City or Town Bellevue  
Entity Address, State or Province WA  
Entity Address, Postal Zip Code 98004  
Entity Phone Fax Numbers [Line Items]    
City Area Code (425)  
Local Phone Number 635-7700  
Entity Listings [Line Items]    
Entity Common Stock, Shares Outstanding   19,276,978
Common stock, par value $0.0001 per share    
Entity Listings [Line Items]    
Title of 12(b) Security Common stock, par value $0.0001 per share  
Trading Symbol OSRH  
Security Exchange Name NASDAQ  
Redeemable warrants, exercisable for shares of common stock at an exercise price of $11.50 per share    
Entity Listings [Line Items]    
Title of 12(b) Security Redeemable warrants, exercisable for shares of common stock at an exercise price of $11.50 per share  
Trading Symbol OSRHW  
Security Exchange Name NASDAQ