Document and Entity Information - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Mar. 31, 2023	Apr. 28, 2023
Details
Registrant CIK	0000724910
Fiscal Year End	--03-31
Document Type	10-K
Document Annual Report	true
Document Period End Date	Mar. 31, 2023
Document Transition Report	false
Entity File Number	000-12196
Entity Registrant Name	NVE CORP
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
Entity Address, Address Description	Address of principal executive offices
Phone Fax Number Description	Registrant’s telephone number, including area code
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
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction	false
Entity Shell Company	false
Entity Public Float	$ 169
Entity Listing, Par Value Per Share	$ 0.01
Entity Common Stock, Shares Outstanding		4,830,826
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Auditor Name	Boulay PLLP
Auditor Firm ID	542
Auditor Location	Minneapolis, Minnesota