Document And Entity Information (USD $)	12 Months Ended
	Jun. 30, 2014	Sep. 12, 2014	Dec. 31, 2013
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		19,419,076
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jun. 30, 2014
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2014
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 61,846,891