Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2023	Mar. 05, 2024	Jun. 30, 2023
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Period End Date	Dec. 31, 2023
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Document Transition Report	false
Entity File Number	001-34079
Entity Registrant Name	Ocuphire Pharma, Inc.
Entity Central Index Key	0001228627
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	11-3516358
Entity Address, Address Line One	37000 Grand River Avenue, Suite 120
Entity Address, City or Town	Farmington Hills
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	48335
City Area Code	248
Local Phone Number	957-9024
Title of 12(b) Security	Common Stock, $0.0001 par value per share
Trading Symbol	OCUP
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
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 89,224,159
Entity Common Stock, Shares Outstanding		24,813,370
Auditor Firm ID	42
Auditor Name	Ernst & Young LLP
Auditor Location	Detroit, Michigan