v3.26.1
Cover - USD ($)
 12 Months Ended
Dec. 31, 2025
Mar. 17, 2026
Jun. 30, 2025
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2025    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2025    
Current Fiscal Year End Date --12-31    
Entity File Number 001-38207    
Entity Registrant Name Celcuity Inc.    
Entity Central Index Key 0001603454    
Entity Tax Identification Number 82-2863566    
Entity Incorporation, State or Country Code DE    
Entity Address, Address Line One 16305 36th    
Entity Address, Address Line Two Avenue North    
Entity Address, Address Line Three Suite 100    
Entity Address, City or Town Minneapolis    
Entity Address, State or Province MN    
Entity Address, Postal Zip Code 55446    
City Area Code (763)    
Local Phone Number 392-0767    
Title of 12(b) Security Common Stock, $0.001 par value per share    
Trading Symbol CELC    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 457,485,677
Entity Common Stock, Shares Outstanding   48,336,675  
Documents Incorporated by Reference [Text Block] Portions of the registrant’s definitive proxy statement relating to its 2026 Annual Meeting of Stockholders are incorporated by reference into Part III of this Annual Report on Form 10-K.    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Auditor Opinion [Text Block] We have audited the accompanying balance sheets of Celcuity Inc. (the Company) as of December 31, 2025 and 2024, and the related statements of operations, changes in stockholders’ equity, and cash flows for each of the years in the two-year period ended December 31, 2025, and the related notes (collectively referred to as the financial statements). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2025 and 2024, and the results of its operations and its cash flows for each of the years in the two-year period ended December 31, 2025, in conformity with accounting principles generally accepted in the United States of America.    
Auditor Name Boulay LLP    
Auditor Location Minneapolis, Minnesota    
Auditor Firm ID 542