Quarterly report pursuant to Section 13 or 15(d)

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

v3.24.1.u1
Related-Party Transactions - Schedule of Management Fees, Incentive Fees and Associated Credits and Administration Fees (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Adviser    
Related Party Transaction [Line Items]    
Total fees to Gladstone Securities $ 2,156 $ 2,149
Base management fee | Adviser    
Related Party Transaction [Line Items]    
Total fees to Gladstone Securities 2,156 2,149
Administration Fee    
Related Party Transaction [Line Items]    
Total fees to Gladstone Securities 603 575
Financing Fees and Selling Commissions and Dealer Management Fees | Gladstone Securities    
Related Party Transaction [Line Items]    
Total fees to Gladstone Securities 28 149
Selling Commissions and Dealer Management Fees | Gladstone Securities    
Related Party Transaction [Line Items]    
Total fees to Gladstone Securities $ 28 $ 149