Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Mar. 18, 2022	Jun. 30, 2021
Cover [Abstract]
Entity Registrant Name	NOBLE ROMAN’S, INC.
Entity Central Index Key	0000709005
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		22,215,512
Entity Public Float			$ 4.4
Document Annual Report	true
Entity File Number	0-11104
Entity Address State Or Province	IN
Entity Tax Identification Number	35-1281154
Entity Interactive Data Current	Yes
Icfr Auditor Attestation Flag	false
Document Transition Report	false
Entity Address Address Line 1	6612 E.
Entity Address Address Line 2	75th Street
Entity Address Address Line 3	Suite 450
City Area Code	317
Local Phone Number	634-3377
Entity Address City Or Town	Indianapolis
Entity Address Postal Zip Code	46250
Entity Incorporation State Country Code	IN
Auditor Name	Somerset CPA’s, P.C.
Auditor Location	Indianapolis, Indiana
Auditor Firm Id	752