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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Cost/Amortized Cost $ 584,586 $ 652,217
Common stock, par value $ 0.01 $ 0.01
Common stock, authorized 20,000,000 20,000,000
Common stock, issued 9,938,935 9,916,856
Common stock, outstanding 9,480,362 [1],[2] 9,581,536
Non-controlled/Non-affiliated Investments    
Cost/Amortized Cost $ 454,095 $ 518,699
Non-controlled Affiliated Investments    
Cost/Amortized Cost 72,449 75,196
Controlled Affiliated Investments    
Cost/Amortized Cost 58,042 58,322
Great Lakes Portman Ridge Funding LLC Revolving Credit Facility    
Deferred financing costs, net 858 1,107
2018-2 Secured Notes    
Debt instruments, net of discount 855 1,226
4.875% Notes Due 2026    
Debt instruments, net of discount 1,346 1,704
Deferred financing costs, net $ 628 $ 818
[1] Refer to Note 9 "Stockholders' Equity" for additional information on changes in components of Stockholders' Equity
[2] Totals may not sum due to rounding.