XML 21 R14.htm IDEA: XBRL DOCUMENT v3.24.2.u1
N-2 - $ / shares
 6 Months Ended
Jun. 30, 2024
Dec. 31, 2023
Jun. 30, 2023
Dec. 31, 2022
Cover [Abstract]        
Entity Central Index Key 0001372807      
Amendment Flag false      
Securities Act File Number 814-00735      
Document Type 10-Q      
Entity Registrant Name Portman Ridge Finance Corporation      
Entity Address, Address Line One 650 Madison Avenue      
Entity Address, Address Line Two 3rd Floor      
Entity Address, City or Town New York      
Entity Address, State or Province NY      
Entity Address, Postal Zip Code 10022      
City Area Code 212      
Local Phone Number 891-2880      
Entity Emerging Growth Company false      
General Description of Registrant [Abstract]        
Risk Factors [Table Text Block]

Item 1A. Risk Factors

There have been no material changes during the quarter ended June 30, 2024 to the risk factors that were included in our Annual Report on Form 10-K for the year ended December 31, 2023. 		     
Share Price [1] $ 19.62 $ 18.19 $ 19.99 $ 23
NAV Per Share [1] 21.21 [2] 22.76 22.54 [2] 24.23
Share Price [1] 19.62 18.19 19.99 23
NAV Per Share [1] $ 21.21 [2] $ 22.76 $ 22.54 [2] $ 24.23
[1] Totals may not sum due to rounding.
[2] Refer to Note 9 “Stockholders' Equity” for additional information on changes in components of Stockholders' Equity