Cover - USD ($)	12 Months Ended
	Dec. 31, 2023	Mar. 07, 2024	Jun. 30, 2023
Cover [Abstract]
Document Type	10-K/A
Amendment Flag	true
Amendment Description	This Amendment No. 1 on Form 10-K/A (this “Amendment”) is being filed by Research Frontiers Incorporated (the “Company”) to amend its Annual Report on Form 10-K for the fiscal year ended December 31, 2023, originally filed with the Securities and Exchange Commission (“SEC”) on March 7, 2024 (the “Original Filing”). This Amendment is being filed solely to include the Company’s Executive Compensation Recovery (Clawback) Policy, adopted in accordance with SEC Rule 10D-1 and NASDAQ Listing Rule 5608, which was inadvertently omitted from the Original Filing. The policy is filed as Exhibit 97 to this Amendment.   No other changes have been made to the Original Filing. The Company is not aware of any event that would trigger the application of the Executive Compensation recovery (Clawback) Policy. This Amendment does not reflect events occurring after the filing of the Original Filing and does not modify or update the disclosures therein in any way, other than as specifically set forth herein.
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2023
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2023
Current Fiscal Year End Date	--12-31
Entity File Number	1-9399
Entity Registrant Name	RESEARCH FRONTIERS INCORPORATED
Entity Central Index Key	0000793524
Entity Tax Identification Number	11-2103466
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	240 CROSSWAYS PARK DRIVE
Entity Address, City or Town	WOODBURY
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	11797-2033
City Area Code	(516)
Local Phone Number	364-1902
Title of 12(b) Security	Common Stock, $0.0001 Par Value
Trading Symbol	REFR
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			$ 51,773,808
Entity Common Stock, Shares Outstanding		33,509,287
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false