Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2021	Jul. 31, 2021
Document Information [Line Items]
Entity Central Index Key	0000722313
Entity Registrant Name	NORTECH SYSTEMS INC
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2021
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2021
Document Transition Report	false
Entity File Number	0-13257
Entity Incorporation, State or Country Code	MN
Entity Tax Identification Number	41-1681094
Entity Address, Address Line One	7550 Meridian Circle N., Suite # 150
Entity Address, City or Town	Maple Grove
Entity Address, State or Province	MN
Entity Address, Postal Zip Code	55369
City Area Code	952
Local Phone Number	345-2244
Title of 12(b) Security	Common Stock, par value $.01 per share
Trading Symbol	NSYS
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		2,660,330