v3.22.2.2
Document and Entity Information
Sep. 19, 2022
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0001369568
Document Type 8-K
Document Period End Date Sep. 19, 2022
Entity Registrant Name CATALYST PHARMACEUTICALS, INC.
Entity Incorporation State Country Code DE
Entity File Number 001-33057
Entity Tax Identification Number 76-0837053
Entity Address, Address Line One 355 Alhambra
Entity Address, Address Line Two Circle
Entity Address, Address Line Three Suite 801
Entity Address, City or Town Coral Gables
Entity Address, State or Province FL
Entity Address, Postal Zip Code 33134
City Area Code (305)
Local Phone Number 420-3200
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title NASDAQ
Security Exchange Name NASDAQ
Trading Symbol CPRX
Entity Emerging Growth Company false