Cover - USD ($)	12 Months Ended
	Dec. 31, 2024	Feb. 28, 2025	Jun. 30, 2024
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2024
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2024
Current Fiscal Year End Date	--12-31
Entity File Number	0-13257
Entity Registrant Name	NORTECH SYSTEMS INCORPORATED
Entity Central Index Key	0000722313
Entity Tax Identification Number	41-1681094
Entity Incorporation, State or Country Code	MN
Entity Address, Address Line One	7550 Meridian Circle N
Entity Address, Address Line Two	#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 Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
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 Public Float			$ 17,705,142
Entity Common Stock, Shares Outstanding		2,760,793
Documents Incorporated by Reference [Text Block]	Portions of the registrant’s Proxy Statement for Registrant’s Annual Meeting of Shareholders to be held on May 14, 2025 have been incorporated by reference into Part III of this Form 10-K. The Proxy Statement is expected to be filed with the Securities and Exchange Commission (the SEC) within 120 days after December 31, 2024, the end of our fiscal year.
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Auditor Firm ID	23
Auditor Opinion [Text Block]	We have audited the accompanying consolidated balance sheets of Nortech Systems Incorporated and Subsidiaries (the “Company”) as of December 31, 2024 and 2023, the related consolidated statements of operations and comprehensive (loss) income, shareholders’ equity, and cash flows, for the years then ended, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2024 and 2023, and the results of its operations and its cash flows for each of the years then ended, in conformity with accounting principles generally accepted in the United States of America.
Auditor Name	Baker Tilly US, LLP
Auditor Location	Minneapolis, Minnesota