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Cover - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Mar. 01, 2023
Jun. 30, 2022
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2022    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-15555    
Entity Registrant Name Riley Exploration Permian, Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 87-0267438    
Entity Address, Address Line One 29 E. Reno Avenue    
Entity Address, Address Line Two Suite 500    
Entity Address, City or Town Oklahoma City    
Entity Address, State or Province OK    
City Area Code 405    
Local Phone Number 415-8699    
Title of 12(b) Security Common stock, par value $0.001    
Trading Symbol REPX    
Security Exchange Name NYSEAMER    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
ICFR Auditor Attestation Flag true    
Entity Public Float     $ 102.2
Entity Common Stock, Shares Outstanding   20,158,934  
Documents Incorporated by Reference The information required by Part III of this Annual Report, to the extent not set forth herein, is incorporated herein by reference from the registrant's definitive proxy statement relating to the Annual Meeting of Stockholders to be held in 2023, which definitive proxy statement shall be filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year to which this Annual Report relates.    
Entity Central Index Key 0001001614    
Amendment Flag false    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Entity Address, Postal Zip Code 73104