Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2017	Mar. 23, 2018	Jun. 30, 2017
Document and Entity Information
Entity Registrant Name	NORTECH SYSTEMS INC
Entity Central Index Key	0000722313
Document Type	10-K
Document Period End Date	Dec. 31, 2017
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Smaller Reporting Company
Entity Public Float			$ 3,862,952
Entity Common Stock, Shares Outstanding		2,704,823
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY