Document And Entity Information - USD ($)	12 Months Ended
	Mar. 31, 2022	Apr. 29, 2022	Sep. 30, 2021
Document Information [Line Items]
Entity Central Index Key	0000724910
Entity Registrant Name	NVE CORP /NEW/
Amendment Flag	false
Current Fiscal Year End Date	--03-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2022
Document Type	10-K
Document Annual Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity File Number	000-12196
Entity Incorporation, State or Country Code	MN
Entity Tax Identification Number	41-1424202
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
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	NVEC
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 200,000,000
Entity Common Stock, Shares Outstanding		4,830,826
Auditor Name	Boulay PLLP
Auditor Location	Minneapolis, Minnesota
Auditor Firm ID	542