0001579428 2020-10-30 0001579428 2020-01-01 2020-09-30 shares 0001579428 --12-31 2020 Q3 false 10-Q/A true 2020-09-30 false 001-37635 AXSOME THERAPEUTICS, INC. DE 45-4241907 22 Cortlandt Street 16th Floor New York NY 10007 212 332-3241 Yes Yes Accelerated Filer true true true false Common Stock, Par Value $0.0001 Per Share AXSM NASDAQ 37344201