Document And Entity Information - shares	3 Months Ended
	Jun. 30, 2019	Jul. 12, 2019
Document Information [Line Items]
Entity Registrant Name	NVE CORP /NEW/
Entity Central Index Key	0000724910
Trading Symbol	nvec
Current Fiscal Year End Date	--03-31
Entity Filer Category	Accelerated Filer
Entity Current Reporting Status	Yes
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Common Stock, Shares Outstanding (in shares)		4,846,010
Document Type	10-Q
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Shell Company	false