| Document and Entity Information | Oct. 31, 2023 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001531048 |
| Document Type | 8-K |
| Document Period End Date | Oct. 31, 2023 |
| Entity Registrant Name | Inari Medical, Inc. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-39293 |
| Entity Tax Identification Number | 45-2902923 |
| Entity Address, Address Line One | 6001 Oak Canyon |
| Entity Address, Address Line Two | Suite 100 |
| Entity Address, City or Town | Irvine |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92618 |
| City Area Code | (877) |
| Local Phone Number | 923-4747 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common stock, $0.001 par value |
| Trading Symbol | NARI |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
