Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2021	May 10, 2021
Cover [Abstract]
Entity Registrant Name	INFINITE GROUP INC
Entity Central Index Key	0000884650
Document Type	10-Q
Document Period End Date	Mar. 31, 2021
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	true
Is Entity's Reporting Status Current?	No
Entity Shell Company	false
Entity Interactive Data Current	Yes
Entity Incorporation State Country Code	DE
Entity File Number	0-21816
Entity Common Stock, Shares Outstanding		29,311,883
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2021