v3.25.4
Borrowings - Narrative (Details)
12 Months Ended
Apr. 06, 2022
USD ($)
Dec. 31, 2025
USD ($)
lender
Dec. 31, 2024
USD ($)
Debt Instrument [Line Items]      
Total commitment   $ 150,000,000 $ 325,000,000
Revolving credit facility   66,000,000 88,000,000
Deferred credit facility costs   1,374,000 2,019,000
Outstanding borrowings   140,881,000 160,277,000
Level 3      
Debt Instrument [Line Items]      
Outstanding borrowings   140,881,000 160,277,000
2027 Notes | Senior Notes      
Debt Instrument [Line Items]      
Total commitment   75,000,000 75,000,000
Face amount $ 75,000,000.0    
Interest rate 5.86%    
Current borrowing capacity $ 25,000,000    
Asset coverage ratio, minimum 1.50    
Interest coverage ratio, minimum 1.25    
Minimum stockholders' equity balance $ 142,800,000    
Upward adjustment, percent of issuance proceeds 65.00%    
Deferred issuance costs   $ 300,000  
Debt term   5 years  
2027 Notes | Senior Notes | Level 3      
Debt Instrument [Line Items]      
Outstanding borrowings   $ 74,900,000 72,300,000
2027 Notes | Senior Notes | Internal Noninvestment Grade      
Debt Instrument [Line Items]      
Interest rate 6.86%    
Revolving Credit Facility | Credit Facility | Line of Credit      
Debt Instrument [Line Items]      
Total commitment   $ 75,000,000.0 250,000,000
Number of lenders | lender   1  
Accordion feature, higher borrowing capacity option   $ 125,000,000.0  
Advance rate   55.00%  
Debt instrument, variable interest rate, type flag   Secured Overnight Financing Rate (SOFR) [Member]  
Basis spread on variable rate   0.50%  
Revolving credit facility   $ 66,000,000.0 88,000,000.0
Deferred credit facility costs   1,400,000 2,000,000.0
Credit facility, average outstanding borrowings   $ 61,600,000 $ 83,300,000
Credit facility, average interest rate   7.30% 8.40%
Assets pledged as collateral   $ 219,200,000 $ 260,800,000
Outstanding borrowings   66,000,000 88,000,000
Revolving Credit Facility | Credit Facility | Line of Credit | Level 3      
Debt Instrument [Line Items]      
Outstanding borrowings   $ 66,000,000 $ 88,000,000
Revolving Credit Facility | Credit Facility | Line of Credit | Revolving Period      
Debt Instrument [Line Items]      
Basis spread on variable rate   3.05%  
Revolving Credit Facility | Credit Facility | Line of Credit | Amortization Period      
Debt Instrument [Line Items]      
Basis spread on variable rate   4.05%