Annual report pursuant to Section 13 and 15(d)

REGISTRATION STATEMENT AND COMMON EQUITY OFFERINGS (Details)

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REGISTRATION STATEMENT AND COMMON EQUITY OFFERINGS (Details) - USD ($)
 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Feb. 28, 2024
Aug. 31, 2022
Sep. 03, 2021
Dec. 31, 2019
Government Assistance [Line Items]              
Proceeds from issuance of common stock $ 44,508,000 $ 5,492,000 $ 0        
Registration Statement on Form N-2 (File No. 333-277452)              
Government Assistance [Line Items]              
Securities, aggregate value authorized       $ 450,000,000.0      
Securities, remaining capacity of aggregate value authorized 450,000,000.0            
Registration Statement on Form N-2 (File No. 333-259302)              
Government Assistance [Line Items]              
Securities, aggregate value authorized           $ 300,000,000.0  
Securities, remaining capacity of aggregate value authorized 175,300,000            
Common Stock ATM Program              
Government Assistance [Line Items]              
Sale of stock, aggregate offering price authorized         $ 50,000,000   $ 35,000,000
Remaining capacity under the common stock ATM program $ 0            
Sale of stock, number of shares sold (in shares) 3,097,162 386,482 0        
Sale of stock, weighted-average gross price per share (in USD per share) $ 14.37 $ 14.21          
Sale of stock, consideration received $ 44,500,000 $ 5,500,000          
Sale of stock, weighted-average net price per share after deducting commissions and offering costs (in USD per share) $ 14.12 $ 14.01          
Proceeds from issuance of common stock $ 43,700,000 $ 5,400,000