| Cover | Oct. 18, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Oct. 18, 2023 |
| Entity File Number | 000-12196 |
| Entity Registrant Name | NVE Corporation |
| Entity Central Index Key | 0000724910 |
| Entity Tax Identification Number | 41-1424202 |
| Entity Incorporation, State or Country Code | MN |
| Entity Address, Address Line One | 11409 Valley View Road |
| Entity Address, City or Town | Eden Prairie |
| Entity Address, State or Province | MN |
| Entity Address, Postal Zip Code | 55344 |
| City Area Code | 952 |
| Local Phone Number | 829-9217 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.01 par value |
| Trading Symbol | NVEC |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
