Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2023	Mar. 27, 2024	Jun. 30, 2023
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Period End Date	Dec. 31, 2023
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Document Transition Report	false
Entity File Number	001-40564
Entity Registrant Name	SILVER SPIKE INVESTMENT CORP.
Entity Central Index Key	0001843162
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	86-2872887
Entity Address, Address Line One	600 Madison Avenue
Entity Address, Address Line Two	Suite 1800
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10022
City Area Code	212
Local Phone Number	905-4923
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	SSIC
Security Exchange Name	NASDAQ
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	true
Entity Ex Transition Period	false
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 14,022,851
Entity Common Stock, Shares Outstanding		6,214,941
Auditor Firm ID	243
Auditor Name	BDO USA, P.C.
Auditor Location	New York