Quarterly report pursuant to Section 13 or 15(d)

RELATED PARTY TRANSACTIONS - Narrative (Details)

v3.25.0.1
RELATED PARTY TRANSACTIONS - Narrative (Details) - USD ($)
 3 Months Ended 12 Months Ended 36 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Mar. 31, 2023
Mar. 31, 2023
Sep. 30, 2024
Related Party Transaction [Line Items]          
Base management fee 1.75% 1.75%      
Base management fee, percent fee 100.00%        
Management and service fee, net of credit 0.50% 0.50%      
Management and service fees, loans 1.50%        
Ratio of net investment income (loss) to average net assets – annualized 5.61% 7.99%      
Incentive fee base on minimum rate of return required on investment $ 0        
Percentage of pre-incentive fee net investment income is less than the hurdle rate 100.00%        
Investment company, pre-incentive fee net investment income, percent threshold of net assets 2.1875%   2.50%    
Pre-incentive fee net investment income exceeds the hurdle rate 20.00%        
Investment company, capital gains-based incentive fees 20.00%        
Capital gains-based incentive fee $ 0        
Investment company, net investment income to common stockholder distributions ratio, threshold 100.00%        
Incentive fee credit $ 239,000 $ 0      
Investment company, other operating expenses, due to advisor $ 93,000       $ 52,000
Gladstone Securities          
Related Party Transaction [Line Items]          
Selling commissions, percentage 7.00%        
Dealer manager fees percentage 3.00%        
Payments for selling commissions and dealer-manager fees $ 300,000 0      
Related Party          
Related Party Transaction [Line Items]          
Fee income 200,000 $ 55,000      
Fees due to related party 2,915,000       4,458,000
Related Party | Gladstone Investment Corporation          
Related Party Transaction [Line Items]          
Fees due to related party $ 59,000       $ 75,000
Total fees due to Adviser | Related Party | Chief Executive Officer          
Related Party Transaction [Line Items]          
Noncontrolling interest, ownership percentage by parent 100.00%        
Fee due to Administrator | Related Party | Chief Executive Officer          
Related Party Transaction [Line Items]          
Noncontrolling interest, ownership percentage by parent 100.00%        
Gladstone Securities, LLC | Related Party | Chief Executive Officer          
Related Party Transaction [Line Items]          
Noncontrolling interest, ownership percentage by parent 100.00%        
Maximum          
Related Party Transaction [Line Items]          
Base management fee 1.75%        
Minimum          
Related Party Transaction [Line Items]          
Ratio of net investment income (loss) to average net assets – annualized 1.75%     2.00%