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Investments - Schedule of Investment Purchases Sales And Principal Payments (Details) - USD ($)	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Investment purchases, at cost (including PIK interest)	$ 16,535,289	$ 22,147,855
Sales and repayments	$ 10,317,357	$ 16,476,699

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- Definition

Investment purchases, at cost including PIK interest.

+ References

No definition available.

+ Details

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Period Type:	duration

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- Definition

Proceeds from sales and repayments of investments.

+ References

No definition available.

+ Details

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Namespace Prefix:	icmb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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