RELATED PARTY ARRANGEMENTS - Investment Income Incentive Fee (Details) - USD ($)	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
RELATED PARTY ARRANGEMENTS
Incentive fees	$ 8,393,139	$ 10,045,966	$ 10,189,888
Incentive fees payable current	$ 1,539,724	2,351,703
Related party \| Investment Advisory Agreement \| Stellus Capital
RELATED PARTY ARRANGEMENTS
Pre-incentive fee net investment income, quarter hurdle rate	2.00%
Pre-incentive fee net investment income, annual hurdle rate	8.00%
Incentive fee paid to investment advisor	$ 0
Cumulative pre-incentive fee net rate of return	20.00%
Incentive fees	$ 8,393,139	10,045,966	$ 10,189,888
Incentive fees payable	2,317,429	3,109,560
Incentive fees payable current	1,539,724	2,351,703
Income incentive fees written off	3,310,981	1,826,893
Related party \| Investment Advisory Agreement \| Stellus Capital \| Payment in Kind (PIK)
RELATED PARTY ARRANGEMENTS
Incentive fees payable	$ 777,705	$ 757,857
Related party \| Investment Advisory Agreement \| Stellus Capital \| Scenario, Hurdle Rate Less Than 2.5%
RELATED PARTY ARRANGEMENTS
Pre-incentive fee net investment income, quarter hurdle rate	2.50%
Pre-incentive fee net investment income, annual hurdle rate	10.00%
Cumulative pre-incentive fee net rate of return	100.00%
Related party \| Investment Advisory Agreement \| Stellus Capital \| Scenario, Hurdle Rate Greater Than Than 2.5%
RELATED PARTY ARRANGEMENTS
Pre-incentive fee net investment income, quarter hurdle rate	2.50%
Pre-incentive fee net investment income, annual hurdle rate	10.00%
Cumulative pre-incentive fee net rate of return	20.00%

Amount of incentive feed accrued but not paid written off.

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Amount of incentive fee paid to investment advisor.

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Carrying amount of the unpaid portion of the investment income incentive fee payable classified as current.

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Amount of investment income incentive fees incurred to be paid.

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Threshold hurdle rate of pre-incentive fee net income to net assets on annual basis.

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Threshold hurdle rate of pre-incentive fee net income to net assets on quarterly basis.

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Percentage of cumulative pre-incentive fee rate of return.

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Amount of expense for incentive fee based on performance under arrangement to manage operations, including, but not limited to, investment.

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