| Cover | Jul. 31, 2024 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jul. 31, 2024 |
| Entity File Number | 001-39795 |
| Entity Registrant Name | RESERVOIR MEDIA, INC. |
| Entity Central Index Key | 0001824403 |
| Entity Tax Identification Number | 83-3584204 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 200 Varick Street |
| Entity Address, Address Line Two | Suite 801 |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10014 |
| City Area Code | 212 |
| Local Phone Number | 675-0541 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Common Stock [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Common stock, $0.0001 par value per share |
| Trading Symbol | RSVR |
| Security Exchange Name | NASDAQ |
| Warrant [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Warrants, each whole warrant exercisable for one share of common stock at an exercise price of $11.50 per share |
| Trading Symbol | RSVRW |
| Security Exchange Name | NASDAQ |
