v3.26.1
Investments - Schedules of Portfolio Composition by Geographic Region at Amortized Cost and Fair Value (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2025
Mar. 31, 2026
Sep. 30, 2025
Schedule of Investments [Line Items]      
Amortized Cost   $ 397,986 $ 385,232
Fair Value   $ 397,083 [1] $ 390,128 [2]
Investments, at Amortized Cost | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   100.00% 100.00%
Investments, at Fair Value | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   100.00% 100.00%
Southeast      
Schedule of Investments [Line Items]      
Amortized Cost   $ 88,667 $ 84,132
Fair Value   $ 88,370 $ 85,114
Southeast | Investments, at Amortized Cost | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   22.30% 21.80%
Southeast | Investments, at Fair Value | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   22.30% 21.80%
Midwest      
Schedule of Investments [Line Items]      
Amortized Cost   $ 86,448 $ 81,814
Fair Value   $ 86,806 $ 83,086
Midwest | Investments, at Amortized Cost | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   21.80% 21.30%
Midwest | Investments, at Fair Value | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   21.80% 21.20%
West      
Schedule of Investments [Line Items]      
Amortized Cost   $ 72,449 $ 74,740
Fair Value   $ 72,081 $ 75,648
West | Investments, at Amortized Cost | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   18.20% 19.50%
West | Investments, at Fair Value | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   18.20% 19.40%
Mid-Atlantic      
Schedule of Investments [Line Items]      
Amortized Cost   $ 58,136 $ 54,273
Fair Value   $ 58,174 $ 54,951
Mid-Atlantic | Investments, at Amortized Cost | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   14.60% 14.10%
Mid-Atlantic | Investments, at Fair Value | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   14.60% 14.10%
Southwest      
Schedule of Investments [Line Items]      
Amortized Cost   $ 46,670 $ 46,747
Fair Value   $ 46,366 $ 47,108
Southwest | Investments, at Amortized Cost | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   11.70% 12.10%
Southwest | Investments, at Fair Value | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   11.70% 12.10%
Northeast      
Schedule of Investments [Line Items]      
Amortized Cost   $ 34,737 $ 32,355
Fair Value   $ 34,393 $ 32,640
Northeast | Investments, at Amortized Cost | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   8.70% 8.40%
Northeast | Investments, at Fair Value | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   8.70% 8.40%
United Kingdom      
Schedule of Investments [Line Items]      
Amortized Cost   $ 3,693 $ 5,170
Fair Value   $ 3,801 $ 5,369
United Kingdom | Investments, at Amortized Cost | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   1.00% 1.30%
United Kingdom | Investments, at Fair Value | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   1.00% 1.40%
Canada      
Schedule of Investments [Line Items]      
Amortized Cost   $ 3,200 $ 2,964
Fair Value   $ 3,036 $ 3,007
Canada | Investments, at Amortized Cost | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   0.80% 0.80%
Canada | Investments, at Fair Value | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   0.80% 0.80%
Sweden      
Schedule of Investments [Line Items]      
Amortized Cost   $ 2,458 $ 2,453
Fair Value   $ 2,538 $ 2,603
Sweden | Investments, at Amortized Cost | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   0.60% 0.60%
Sweden | Investments, at Fair Value | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   0.60% 0.70%
Luxembourg      
Schedule of Investments [Line Items]      
Amortized Cost   $ 943 $ 0
Fair Value   $ 933 $ 0
Luxembourg | Investments, at Amortized Cost | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   0.20% 0.00%
Luxembourg | Investments, at Fair Value | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   0.20% 0.00%
Denmark      
Schedule of Investments [Line Items]      
Amortized Cost   $ 554 $ 553
Fair Value   $ 548 $ 554
Denmark | Investments, at Amortized Cost | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   0.10% 0.10%
Denmark | Investments, at Fair Value | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent)   0.10% 0.10%
Israel      
Schedule of Investments [Line Items]      
Amortized Cost   $ 31 $ 31
Fair Value   $ 37 $ 48
Israel | Investments, at Amortized Cost | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent) 0.00% 0.00%  
Israel | Investments, at Fair Value | Geographic Concentration Risk      
Schedule of Investments [Line Items]      
Concentration risk, percentage (as a percent) 0.00% 0.00%  
[1] The fair values of investments were valued using significant unobservable inputs, unless otherwise noted. See Note 7. The fair value of loan investments may include the impact of the unfunded commitment being valued below par.
[2] The fair values of investments were valued using significant unobservable inputs, unless otherwise noted. See Note 7. The fair value of loan investments may include the impact of the unfunded commitment being valued below par.