Annual report pursuant to Section 13 and 15(d)

INVESTMENTS - Narrative (Details)

v3.23.1
INVESTMENTS - Narrative (Details)
$ in Thousands
 1 Months Ended 12 Months Ended
Feb. 28, 2023
USD ($)
Dec. 31, 2022
USD ($)
Nov. 30, 2022
USD ($)
Oct. 31, 2022
USD ($)
Aug. 31, 2022
USD ($)
Jul. 31, 2022
USD ($)
Jun. 30, 2022
USD ($)
May 31, 2022
USD ($)
Mar. 31, 2023
USD ($)
portfolioCompany
state
industry
Mar. 31, 2022
USD ($)
Mar. 31, 2021
USD ($)
Aug. 31, 2012
USD ($)
Summary of Investment Holdings [Line Items]                        
Purchase of investments                 $ 133,756 $ 92,738 $ 95,272  
Success fee income:                 10,402 10,308 2,388  
Principal repayments of investments                 52,300 51,398 20,734  
Cost                 720,630 [1] 669,248 [2]    
Dividend income:                 10,865 2,595 7,075  
Total                 $ 2,150 14,500    
Number of investment portfolio company | portfolioCompany                 25      
Net realized loss                 $ (10,753) (12,444) $ (10,592)  
Number of states which have invested in the company location | state                 19      
Number of industries that have made investments | industry                 14      
Investments owned, fair value                 $ 753,543 [1] 714,396 [2]    
Uncollectible receivables allowance, minimum required day for uncollectible adjustment                 90 days      
Gross receivables from portfolio companies                 $ 2,200 1,700    
Allowance for uncollectible receivables                 1,600 1,300    
Investment Portfolio Benchmark | Customer Concentration Risk | Five Largest Portfolio Investments                        
Summary of Investment Holdings [Line Items]                        
Investments owned, fair value                 $ 322,300      
Concentration risk, percentage                 42.80%      
Nocturne Villa Rentals, Inc.                        
Summary of Investment Holdings [Line Items]                        
Purchase of investments       $ 8,400       $ 6,400        
Bassett Creek Services, Inc.                        
Summary of Investment Holdings [Line Items]                        
Success fee income:             $ 3,000          
Realized gain on preferred equity             4,700          
Net proceeds from the sale of investments             57,600          
Principal repayments of investments             48,000          
Dema/Mai Holdings, Inc.                        
Summary of Investment Holdings [Line Items]                        
Purchase of investments           $ 39,100 $ 21,000          
Horizon Facilities Services, Inc.                        
Summary of Investment Holdings [Line Items]                        
Purchase of investments           30,000            
Success fee income:           1,700            
Realized gain on preferred equity           2,200            
Proceeds from equity           12,300            
Cost           10,100            
Dividend income:           $ 3,100            
Ginsey Home Solutions, Inc. - Term Debt 1                        
Summary of Investment Holdings [Line Items]                        
Cost         $ 13,300              
Ginsey Home Solutions, Inc.- Term Debt 2                        
Summary of Investment Holdings [Line Items]                        
Cost         12,200              
Ginsey Home Solutions, Inc.                        
Summary of Investment Holdings [Line Items]                        
Purchase of investments         4,000              
Cost                 $ 12,200     $ 5,000
Payment to extinguish secured borrowing liability         $ 5,100              
Investments owned, fair value                 $ 12,200      
Country Club Enterprises, LLC – Guaranty                        
Summary of Investment Holdings [Line Items]                        
Success fee income:     $ 1,100                  
Principal repayments of investments     1,500                  
Total     $ 1,000             $ 1,000    
Old World Christmas, Inc.                        
Summary of Investment Holdings [Line Items]                        
Purchase of investments   $ 15,500                    
Realized gain on preferred equity   13,400                    
Proceeds from equity   17,900                    
Dividend income:   4,500                    
The Mountain Corporation                        
Summary of Investment Holdings [Line Items]                        
Purchase of investments $ 4,700 3,200                    
Cost $ 4,300 13,200                    
Net realized loss   $ 10,000                    
[1] Cumulative gross unrealized appreciation for federal income tax purposes is $150.4 million; cumulative gross unrealized depreciation for federal income tax purposes is $119.3 million. Cumulative net unrealized appreciation is $31.1 million, based on a tax cost of $722.4 million.
[2] Cumulative gross unrealized appreciation for federal income tax purposes is $140.8 million; cumulative gross unrealized depreciation for federal income tax purposes is $97.1 million. Cumulative net unrealized appreciation is $43.8 million, based on a tax cost of $670.6 million.