Document and Entity Information	3 Months Ended
	Dec. 31, 2011	Jan. 13, 2012
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Dec. 31, 2011
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2012
Entity Registrant Name	NVE CORP /NEW/
Entity Central Index Key	0000724910
Current Fiscal Year End Date	--03-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		4,824,745