Quarterly report pursuant to Section 13 or 15(d)

Related-Party Transactions - Summary of Management Fees, Incentive Fees and Associated Credits and Administration Fees (Details)

v3.23.2
Related-Party Transactions - Summary of Management Fees, Incentive Fees and Associated Credits and Administration Fees (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Adviser        
Related Party Transaction [Line Items]        
Total fees to Gladstone Securities $ 2,148 $ 2,043 $ 4,296 $ 5,210
Base management fee | Adviser        
Related Party Transaction [Line Items]        
Total fees to Gladstone Securities 2,148 2,043 4,296 4,079
Incentive fee | Adviser        
Related Party Transaction [Line Items]        
Total fees to Gladstone Securities 0 0 0 1,131
Administration Fee        
Related Party Transaction [Line Items]        
Total fees to Gladstone Securities 514 463 1,090 926
Financing Fees and Selling Commissions and Dealer Management Fees | Gladstone Securities        
Related Party Transaction [Line Items]        
Total fees to Gladstone Securities 183 2,891 332 6,163
Selling Commissions and Dealer Management Fees | Gladstone Securities        
Related Party Transaction [Line Items]        
Total fees to Gladstone Securities 183 2,891 332 6,069
Financing fees        
Related Party Transaction [Line Items]        
Total fees to Gladstone Securities 0   $ 0  
Financing fees | Gladstone Securities        
Related Party Transaction [Line Items]        
Total fees to Gladstone Securities $ 0 $ 0   $ 94