v3.26.1
Significant Accounting Policies and Recent Accounting Updates (Details)
 3 Months Ended 9 Months Ended
Jun. 30, 2026
USD ($)
security
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
segment
security
Jun. 30, 2025
USD ($)
Sep. 30, 2025
USD ($)
security
Accounting Policies [Abstract]          
Loan origination fees received $ 42,000 $ 171,000 $ 281,000 $ 857,000  
Interest income, operating, accretion of discounts and amortization of premiums 317,000 236,000 932,000 804,000  
Payment-in-kind interest income 586,000 547,000 1,671,000 1,492,000  
Payment-in-kind interest capitalized 583,000 534,000 1,663,000 1,468,000  
Premium prepayment fees 12,000 0 18,000 8,000  
Interest and fee income 7,283,000 8,700,000 25,947,000 24,043,000  
Non-cash dividends 3,000 14,000 32,000 71,000  
Capitalized PIK 3,000 14,000 32,000 71,000  
Cash payments of accrued and capitalized preferred dividends 4,000 0 4,000 84,000  
Dividend income received in cash 1,000 1,000 61,000 29,000  
Return of capital distributions 1,000 1,000 10,000 41,000  
Investments on non-accrual status $ 216,000   $ 216,000   $ 0
Number of preferred equity security on non-accrual status | security 1   1   0
Preferred equity securities aggregate amount in nonaccrual status $ 227,000   $ 227,000    
Excise tax expense 0 0 $ 0 0  
Deferred offering cost, amortization duration (in years)     3 years    
Amortization of deferred offering costs $ 0 $ 0 $ 0 $ 58,000  
Number of operating segments | segment     1    
Number of reportable segments | segment     1