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Document And Entity Information
 6 Months Ended
Jun. 30, 2024
Document Information Line Items  
Entity Registrant Name ALPHA COGNITION INC.
Document Type S-1/A
Amendment Flag true
Amendment Description Amendment No. 2
Entity Central Index Key 0001655923
Entity Filer Category Non-accelerated Filer
Entity Small Business true
Entity Emerging Growth Company true
Entity Ex Transition Period false
Entity Incorporation, State or Country Code A1