Cover - shares	9 Months Ended
	Sep. 30, 2020	Oct. 30, 2020
DOCUMENT AND ENTITY INFORMATION [Abstract]
Document Type	10-Q
Document Period End Date	Sep. 30, 2020
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-38356
Entity Registrant Name	VYNE THERAPEUTICS INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	45-3757789
Entity Address, Address Line One	520 U.S. Highway 22, Suite 204
Entity Address, City or Town	Bridgewater
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	08807
City Area Code	800
Local Phone Number	755-7936
Entity Information, Former Legal or Registered Name	Menlo Therapeutics Inc.
Title of 12(b) Security	Common Stock, par value $0.0001
Trading Symbol	VYNE
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Shell Company	false
Entity Central Index Key	0001566044
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Ex Transition Period	true
Entity Common Stock, Shares Outstanding		167,878,646