v3.26.1
Document And Entity Information - shares
 3 Months Ended
Mar. 31, 2026
May 04, 2026
Document Information [Line Items]    
Entity Central Index Key 0001563665  
Entity Registrant Name Harvard Apparatus Regenerative Technology, Inc.  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2026  
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 001-35853  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 45-5210462  
Entity Address, Address Line One 84 October Hill Road, Suite 11  
Entity Address, City or Town Holliston  
Entity Address, State or Province MA  
Entity Address, Postal Zip Code 01746  
City Area Code 774  
Local Phone Number 233-7300  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   17,580,744