Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2022	Apr. 14, 2023	Jun. 30, 2022
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Document Transition Report	false
Entity File Number	1-37897
Entity Registrant Name	RESHAPE LIFESCIENCES INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-1828101
Entity Address, Address Line One	1001 Calle Amanecer
Entity Address, City or Town	San Clemente
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92673
City Area Code	949
Local Phone Number	429-6680
Title of 12(b) Security	Common stock, $0.001 par value per share
Trading Symbol	RSLS
Security Exchange Name	NASDAQ
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
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		2,649,043
Entity Public Float			$ 10,658,000
Entity Central Index Key	0001427570
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Amendment Flag	false
Auditor Name	RSM US LLP
Auditor Firm ID	49
Auditor Location	Irvine, California