CONSOLIDATED STATEMENTS OF CHANGES IN NET ASSETS (Parentheticals) - $ / shares  | 
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Sep. 30, 2022  | 
Jun. 30, 2022  | 
Sep. 30, 2021  | 
Jun. 30, 2021  | 
Sep. 30, 2022  | 
Sep. 30, 2021  | 
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| Statement of Stockholders' Equity [Abstract] | ||||||
| Net investment income (loss) (in USD per share) | $ 0.14 | $ 0.10 | $ 0.16 | $ 0.20 | $ 0.24 | $ 0.36 | 
| Gain (loss) on investment (in USD per share) | $ 0.08 | $ 0.25 | $ 0.08 | $ 0.07 | $ 0.33 | $ 0.15 | 
| X | ||||||||||
- Definition Investment Company, Distribution to Shareholders from Net Investment Income, Per Share No definition available. 
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| X | ||||||||||
- Definition Investment Company, Distribution To Shareholders From Realized Gains, Per Share No definition available. 
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| X | ||||||||||
- References No definition available. 
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