0001017491 2023-01-01 2023-12-31 0001017491 2023-06-30 0001017491 2024-04-26 iso4217:USD shares false --12-31 2023 FY 0001017491 185 10-K/A true 2023-12-31 false 000-22245 SEELOS THERAPEUTICS, INC. NV 87-0449967 300 Park Avenue 2nd Floor New York NY 10022 646 293-2100 Common Stock, par value $0.001 per share SEEL NASDAQ No No Yes Yes Non-accelerated Filer true false false false false 16609128 144900000 KPMG LLP Short Hills, NJ