Document and Entity Information
Oct. 09, 2020
Document and Entity Information [Abstract]  
Document Type 8-K
Document Period End Date Oct. 09, 2020
Entity File Number 001-36485
Entity Registrant Name ARDELYX, INC.
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 26-1303944
Entity Address, Address Line One 34175 Ardenwood Blvd.
Entity Address, City or Town Fremont
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94555
City Area Code 510
Local Phone Number 745-1700
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, par value $0.0001
Trading Symbol ARDX
Security Exchange Name NASDAQ
Entity Emerging Growth Company false
Entity Central Index Key 0001437402
Amendment Flag false