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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)
3 Months Ended 12 Months Ended
Jul. 18, 2011
Mar. 31, 2023
USD ($)
investment
Mar. 31, 2022
USD ($)
investment
Mar. 31, 2023
USD ($)
investment
Mar. 31, 2022
USD ($)
investment
Mar. 31, 2021
USD ($)
Accounting Policies [Abstract]            
FDIC Insured amount   $ 8,900,000 $ 6,500,000 $ 8,900,000 $ 6,500,000  
FDIC uninsured amount   $ 20,300,000 $ 10,200,000 $ 20,300,000 $ 10,200,000  
Concentration Risk [Line Items]            
Non-cash interest income percent       3.20% 3.70%  
Number of PIK investments | investment   3 2 3 2  
Non-cash PIK interest income percent       4.60% 3.90%  
Remaining lease term   9 years 6 months   9 years 6 months    
Interest or penalties expense       $ 0 $ 0 $ 0
Right to grant period 10 years          
Percentage of Total Portfolio at Fair Value | Credit risk | Investment Owned, Non-accrual Status            
Concentration Risk [Line Items]            
Percentage of Total Portfolio       0.30% 1.50%  
Percentage of Total Portfolio at Cost | Credit risk | Investment Owned, Non-accrual Status            
Concentration Risk [Line Items]            
Percentage of Total Portfolio       1.30% 2.60%