Commitments and Contingencies (Detail)			1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 02, 2017 USD ($)	Aug. 25, 2015 USD ($)	Feb. 28, 2017 shareholder defendant shares	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)
Loss Contingencies [Line Items]
Operating lease agreement expiration date		Sep. 30, 2018				Sep. 30, 2015
Operating lease agreement term		3 years
Total rent expense				$ 64,893	$ 58,905	$ 185,436	$ 176,175
Number of months that require patients to be followed out in clinical trials							60 months
Lake Forest, California
Loss Contingencies [Line Items]
Operating lease agreement expiration date						Sep. 30, 2018
Operating lease, monthly base rent						$ 2,200
Du Litigation
Loss Contingencies [Line Items]
Number of shareholders | shareholder			1
Number of Senior Management members | defendant			4
Number of Shares | shares			1,093,450
Minimum
Loss Contingencies [Line Items]
Operating lease, monthly base rent		$ 18,925
Maximum
Loss Contingencies [Line Items]
Operating lease, monthly base rent		$ 20,345
ReShape Medical, Inc | Office space | Subsequent Event
Loss Contingencies [Line Items]
Operating lease agreement expiration date	Jun. 30, 2022
Operating lease, monthly base rent	$ 24,600
Annual rent escalations, percentage	3.00%
ReShape Medical, Inc | Manufacturing/warehousing space | Subsequent Event
Loss Contingencies [Line Items]
Operating lease, monthly base rent	$ 10,900