Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2024	Mar. 04, 2025	Jun. 30, 2024
Document and Entity Information [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2024
Document Transition Report	false
Entity File Number	001-35730
Entity Registrant Name	Stellus Capital Investment Corp
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	46-0937320
Entity Address, Address Line One	4400 Post Oak Parkway
Entity Address, Adress Line Two	Suite 2200,
Entity Address, City or Town	Houston
Entity Address State Or Province	TX
Entity Address, Postal Zip Code	77027
City Area Code	713
Local Phone Number	292-5400
Title of 12(b) Security	Common Stock, par value $0.001 per share
Trading Symbol	SCM
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 333,805,786
Entity Common Stock, Shares Outstanding		27,519,506
Entity Central Index Key	0001551901
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Amendment Flag	false
Auditor Name	Deloitte & Touche LLP
Auditor Location	Houston, Texas
Auditor Firm ID	34