Cover - USD ($)	12 Months Ended
	Dec. 31, 2021	Mar. 08, 2022	Jun. 30, 2021
Cover [Abstract]
Entity Registrant Name	INSIGNIA SYSTEMS INC/MN
Entity Central Index Key	0000875355
Document Type	10-K
Amendment Flag	false
Entity Voluntary Filers	No
Current Fiscal Year End Date	--12-31
Entity Well Known Seasoned Issuer	No
Entity Small Business	true
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Current Reporting Status	Yes
Document Period End Date	Dec. 31, 2021
Entity Filer Category	Non-accelerated Filer
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2021
Entity Common Stock Shares Outstanding		1,786,296
Entity Public Float			$ 5,460,000
Document Annual Report	true
Entity File Number	001-13471
Entity Incorporation State Country Code	MN
Entity Tax Identification Number	41-1656308
Entity Address Address Line 1	212 Third Avenue N, Suite 356
Entity Address City Or Town	Minneapolis
Entity Address State Or Province	MN
Entity Address Postal Zip Code	55401
City Area Code	763
Icfr Auditor Attestation Flag	false
Local Phone Number	392-6200
Security 12b Title	Common Stock, $0.01 par value
Trading Symbol	ISIG
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes
Auditor Name	Baker Tilly US, LLP
Auditor Location	Minneapolis, Minnesota
Auditor Firm Id	23