Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2024	Mar. 01, 2025	Jun. 30, 2024
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	FY
Document Fiscal Year Focus	2024
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2024
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
Title of 12(g) Security	Common Stock, $0.01 par value
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
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
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 28,300,000
Entity Common Stock, Shares Outstanding		15,918,979
Auditor Name	Marcum LLP
Auditor Location	Boston, MA
Auditor Firm ID	688