Document And Entity Information	3 Months Ended
	Sep. 30, 2014	Nov. 07, 2014
Document Information [Line Items]
Entity Registrant Name	NAPCO SECURITY TECHNOLOGIES, INC
Entity Central Index Key	0000069633
Current Fiscal Year End Date	--06-30
Entity Filer Category	Smaller Reporting Company
Trading Symbol	NSSC
Entity Common Stock, Shares Outstanding		19,202,312
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2014
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2015