SUBSEQUENT EVENTS	9 Months Ended
SUBSEQUENT EVENTS	Sep. 30, 2024
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS On October 3, 2024, we and BMR-Pacific Research Center LP (Landlord) entered into a Lease Agreement (New Fremont Lease) whereby we agreed to lease approximately 15,000 square feet on the first floor of the building located at 7999 Gateway Boulevard, Newark, California (New Fremont Premises). The initial term of the New Fremont Lease will be thirty-nine (39) months and we will have one (1) option to extend the term by sixty (60) months. The Landlord has agreed to conduct certain tenant improvements at Landlord’s expense. The initial term of the New Fremont Lease commences once the tenant improvements are completed, which is estimated to be February 10, 2025. The initial monthly base rent will equal three and 15/100 dollars ($3.15) per square foot of rentable area of the New Fremont Premises and will be subject to an annual upward adjustment of three and a half percent (3.5%) of the then-current base rent. In connection with entering into the New Fremont Lease, we and the Landlord entered into a sixth amendment (the Sixth Amendment) to our existing lease (the Existing Fremont Lease) whereby we lease certain premises at 34175 Ardenwood Boulevard in Fremont, California, which amends the expiration date of the Existing Fremont Lease to be the date that is the later of (a) March 10, 2025, and (b) the date that is the actual “Term Commencement Date” under the New Fremont Lease. On October 25, 2024, we entered into a Commercial Supply Agreement (the CSA) with Hovione Farmaciência, S.A. (Hovione Portugal) and Hovione, LLC (Hovione NJ and, together with Hovione Portugal, Hovione). The CSA contemplates that Hovione will perform spray-drying services for the Company at commercial scale, in the manner developed and validated under the existing Master Services Agreement between the parties. The CSA provides that Hovione will manufacture, and the Company will purchase, certain minimum quantities of tenapanor API beginning in 2024 from its Portugal facility and continuing through the end of the term of the CSA. The parties have agreed that Hovione will purchase, install, validate and qualify equipment at its New Jersey site so that, beginning in 2027, additional product can be supplied by Hovione NJ. The initial term of the CSA is until December 31, 2030, unless terminated earlier by one of the parties by its terms. Thereafter, the CSA will automatically renew for successive terms of two years until terminated by one of the parties. On October 29, 2024, we entered into a Fourth Amendment to Loan and Security Agreement (the Fourth Amendment), by and among Ardelyx, as borrower, SLR, as collateral agent and the lenders party thereto, which amends the SLR Loan Agreement. The Fourth Amendment, among other things, (1) provided for the immediate draw of the Term D loan in a principal amount of $50.0 million on the closing date of the Fourth Amendment and (2) provides us with the option to draw an additional $50.0 million of committed senior secured term loans by June 30, 2025 (the Term E Loan); (3) extends the Maturity Date for all term loans under the SLR Loan Agreement from March 1, 2027 to July 1, 2028; and (4) extends the interest-only period for all term loans under the SLR Agreement until the Maturity Date. The interest rate for the Term D Loan and the Term E Loan is 4.00% plus a rate equal to 0.022% plus the 1-month SOFR reference rate, subject to a SOFR floor of 4.70%. We paid a fee of $0.3 million in connection with the funding of the Term D Loan. We are also obligated to pay an additional $0.3 million on the earliest of (1) the funding date of the Term E Loan, (2) June 30, 2025, and (3) the prepayment, refinancing, substitution, or replacement of any term loan under the SLR Loan Agreement on or prior to the date immediately preceding June 30, 2025. (See Note 8. Borrowing for additional information related to borrowing).