| Cover | Mar. 02, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Mar. 2, 2022 |
| Entity Registrant Name | INHIBRX, INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-39452 |
| Entity Tax Identification Number | 82-4257312 |
| Entity Address, Address Line One | 11025 N. Torrey Pines Road |
| Entity Address, Address Line Two | Suite 200 |
| Entity Address, City or Town | La Jolla |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92037 |
| City Area Code | 858 |
| Local Phone Number | 795-4220 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.0001 per share |
| Trading Symbol | INBX |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0001739614 |
