| Cover | Feb. 23, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Feb. 23, 2022 |
| Entity File Number | 001-39082 |
| Entity Registrant Name | RELMADA THERAPEUTICS, INC. |
| Entity Central Index Key | 0001553643 |
| Entity Tax Identification Number | 45-5401931 |
| Entity Incorporation, State or Country Code | NV |
| Entity Address, Address Line One | 2222 Ponce de Leon Blvd. |
| Entity Address, Address Line Two | Floor 3 |
| Entity Address, City or Town | Coral Gables |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 33134 |
| City Area Code | 786 |
| Local Phone Number | 629-1376 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, $0.001 par value per share |
| Trading Symbol | RLMD |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
