Cover - $ / shares	6 Months Ended
	Sep. 30, 2023	Oct. 13, 2023
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2023
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2024
Current Fiscal Year End Date	--03-31
Entity File Number	000-12196
Entity Registrant Name	NVE CORP
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
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	NVEC
Security Exchange Name	NASDAQ
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 Common Stock, Shares Outstanding		4,833,401
Entity Address, Address Description	Address of principal executive offices
Phone Fax Number Description	Registrant’s telephone number, including area code
Entity Listing, Par Value Per Share	$ 0.01