RELATED PARTY ARRANGEMENTS - Administration Agreement (Details) - USD ($)	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Related Party Transaction [Line Items]
Administrative services expenses	$ 1,810,576	$ 1,798,966	$ 1,781,603
Stellus Capital \| Administration agreement
Related Party Transaction [Line Items]
Administrative services expenses	1,506,344	1,515,630	$ 1,549,627
Administrative services expenses payable	$ 343,817	$ 382,322

The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
-URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration