Investments - Schedule of Investments (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Schedule of Investments [Line Items]
Investment, Interest Rate, Paid in Cash	12.45%
Investment Owned, at Fair Value	$ 1,543,910		$ 1,468,996
Investment, Identifier [Axis]: 300 N. Michigan Mezz, LLC (Delayed Draw), Senior Secured Loans, Due 7/15/2024
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:MichiganMezzLlcMember		mcip:MichiganMezzLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	FIRE Real Estate Sector [Member]		FIRE Real Estate Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	14.57%		14.50%
Investment, Interest Rate, Paid in Kind	19.35%		18.62%
Investment, Acquisition Date	Jul. 15, 2020		Jul. 15, 2020
Investment Maturity Date	Jul. 15, 2024		Jul. 15, 2024
Investment Owned, Balance, Principal Amount	$ 1,000		$ 1,000
Investment Owned, at Fair Value	$ 979		$ 974
Investment, Identifier [Axis]: 95 Percent Buyer, LLC (Revolver), Senior Secured Loans, Due 11/24/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NinetyFivePercentBuyerLlcMember		mcip:NinetyFivePercentBuyerLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.60%		5.50%
Investment Interest Rate	10.27%		9.62%
Investment, Acquisition Date	Nov. 24, 2021		Nov. 24, 2021
Investment Maturity Date	Nov. 24, 2026		Nov. 24, 2026
Investment Owned, Balance, Principal Amount	$ 808		$ 963
Investment, Identifier [Axis]: 95 Percent Buyer, LLC, Equity Securites,Class A units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NinetyFivePercentBuyerLlcMember		mcip:NinetyFivePercentBuyerLlcMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Interest Rate, Paid in Kind	8.00%		8.00%
Investment, Acquisition Date	Nov. 24, 2021		Nov. 24, 2021
Investment Owned, at Fair Value	$ 540		$ 580
Investment, Identifier [Axis]: 95 Percent Buyer, LLC, Senior Secured Loans, Due 11/24/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NinetyFivePercentBuyerLlcMember		mcip:NinetyFivePercentBuyerLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.60%		5.50%
Investment Interest Rate	10.27%		9.62%
Investment, Acquisition Date	Nov. 24, 2021		Nov. 24, 2021
Investment Maturity Date	Nov. 24, 2026		Nov. 24, 2026
Investment Owned, Balance, Principal Amount	$ 17,820		$ 17,865
Investment Owned, at Fair Value	$ 17,669		$ 17,905
Investment, Identifier [Axis]: API Holdings III Corp, Senior Secured Loans, Due 5/8/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ApiHoldingsIiiCorpMember		mcip:ApiHoldingsIiiCorpMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Aerospace & Defense		Aerospace & Defense
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	4.25%		4.25%
Investment Interest Rate	9.41%		8.98%
Investment, Acquisition Date	May 02, 2019		May 02, 2019
Investment Maturity Date	May 08, 2026		May 08, 2026
Investment Owned, Balance, Principal Amount	$ 1,636		$ 1,641
Investment Owned, at Fair Value	$ 1,173		$ 1,308
Investment, Identifier [Axis]: ASG II, LLC, , Unitranche Loans, Due 5/25/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ASGIILLCMember		mcip:ASGIILLCMember
Investment, Type [Extensible Enumeration]	Unitranche Debt [Member]		Unitranche Debt [Member]
Investment, Industry Sector [Extensible Enumeration]			Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	11.08%		10.67%
Investment, Acquisition Date	May 25, 2022		May 25, 2022
Investment Maturity Date	May 25, 2028		May 25, 2028
Investment Owned, Balance, Principal Amount	$ 15,000		$ 15,000
Investment Owned, at Fair Value	$ 15,000		$ 15,000
Investment, Identifier [Axis]: ASG II, LLC, Delayed Draw, Unitranche Loans, Due 5/25/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ASGIILLCMember		mcip:ASGIILLCMember
Investment, Type [Extensible Enumeration]	Unitranche Debt [Member]		Unitranche Debt [Member]
Investment, Industry Sector [Extensible Enumeration]			Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	11.08%		10.67%
Investment, Acquisition Date	May 25, 2022		May 25, 2022
Investment Maturity Date	May 25, 2028		May 25, 2028
Investment Owned, Balance, Principal Amount	$ 2,250		$ 2,250
Investment Owned, at Fair Value	$ 648		$ 405
Investment, Identifier [Axis]: Acquia Inc, Senior Secured Loans, Due 10/31/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:AcquiaIncMember		mcip:AcquiaIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment Interest Rate	11.79%
Investment, Interest Rate, Paid in Cash			10.74%
Investment, Acquisition Date	Nov. 01, 2019		Nov. 01, 2019
Investment Maturity Date	Oct. 31, 2025		Oct. 31, 2025
Investment Owned, Balance, Principal Amount	$ 15,429		$ 15,429
Investment Owned, at Fair Value	$ 15,429		$ 15,429
Investment, Identifier [Axis]: Acquia Inc. (Revolver), Senior Secured Loans, Due 10/31/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:AcquiaIncMember		mcip:AcquiaIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment Interest Rate	12.05%		12.15%
Investment, Interest Rate, Paid in Cash	14.16%
Investment, Acquisition Date	Nov. 01, 2019		Nov. 01, 2019
Investment Maturity Date	Oct. 31, 2025		Oct. 31, 2025
Investment Owned, Balance, Principal Amount	$ 588		$ 588
Investment Owned, at Fair Value	$ 588		$ 346
Investment, Identifier [Axis]: Adept AG Holdings, LLC (Revolver), Senior Secured Loans, One, Due 8/11/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:AdeptAgHoldingsLlcMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Capital Equipment
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			5.75%
Investment Interest Rate			10.46%
Investment, Acquisition Date			Aug. 11, 2022
Investment Maturity Date			Aug. 11, 2027
Investment Owned, Balance, Principal Amount			$ 1,079
Investment, Identifier [Axis]: Adept AG Holdings, LLC (Revolver), Senior Secured Loans, Two, due 8/11/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:AdeptAgHoldingsLlcMember		mcip:AdeptAgHoldingsLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Capital Equipment		Capital Equipment
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.15%		5.50%
Investment Interest Rate	11.05%		10.21%
Investment, Acquisition Date	Aug. 11, 2022		Aug. 11, 2022
Investment Maturity Date	Aug. 11, 2027		Aug. 11, 2027
Investment Owned, Balance, Principal Amount	$ 1,300		$ 1,300
Investment, Identifier [Axis]: Adept AG Holdings, LLC (Revolver), Senior Secured Loans, due 8/11/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:AdeptAgHoldingsLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Capital Equipment
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	6.40%
Investment Interest Rate	11.30%
Investment, Acquisition Date	Aug. 11, 2022
Investment Maturity Date	Aug. 11, 2027
Investment Owned, Balance, Principal Amount	$ 1,082
Investment, Identifier [Axis]: Adept AG Holdings, LLC, Equity Securities, Preferred units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:AdeptAgHoldingsLlcMember		mcip:AdeptAgHoldingsLlcMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Capital Equipment		Capital Equipment
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Aug. 11, 2022		Aug. 11, 2022
Investment Owned, at Fair Value	$ 495		$ 649
Investment, Identifier [Axis]: Adept AG Holdings, LLC, Senior Secured Loans, One, Due 8/11/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:AdeptAgHoldingsLlcMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Capital Equipment
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			5.50%
Investment Interest Rate			10.21%
Investment, Acquisition Date			Aug. 11, 2022
Investment Maturity Date			Aug. 11, 2027
Investment Owned, Balance, Principal Amount			$ 6,484
Investment Owned, at Fair Value			$ 6,445
Investment, Identifier [Axis]: Adept AG Holdings, LLC, Senior Secured Loans, Three, due 8/11/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:AdeptAgHoldingsLlcMember		mcip:AdeptAgHoldingsLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Capital Equipment		Capital Equipment
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.15%		5.50%
Investment Interest Rate	11.05%		9.92%
Investment, Acquisition Date	Aug. 11, 2022		Aug. 11, 2022
Investment Maturity Date	Aug. 11, 2027		Aug. 11, 2027
Investment Owned, Balance, Principal Amount	$ 1,621		$ 1,625
Investment Owned, at Fair Value	$ 1,590		$ 1,615
Investment, Identifier [Axis]: Adept AG Holdings, LLC, Senior Secured Loans, Two, due 8/11/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:AdeptAgHoldingsLlcMember		mcip:AdeptAgHoldingsLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Capital Equipment		Capital Equipment
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.40%		5.75%
Investment Interest Rate	11.30%		10.46%
Investment, Acquisition Date	Aug. 11, 2022		Aug. 11, 2022
Investment Maturity Date	Aug. 11, 2027		Aug. 11, 2027
Investment Owned, Balance, Principal Amount	$ 10,792		$ 10,788
Investment Owned, at Fair Value	$ 10,589		$ 10,724
Investment, Identifier [Axis]: Adept AG Holdings, LLC, Senior Secured Loans, due 8/11/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:AdeptAgHoldingsLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Capital Equipment
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	6.15%
Investment Interest Rate	11.05%
Investment, Acquisition Date	Aug. 11, 2022
Investment Maturity Date	Aug. 11, 2027
Investment Owned, Balance, Principal Amount	$ 6,468
Investment Owned, at Fair Value	$ 6,346
Investment, Identifier [Axis]: Amelia Holding II, LLC (Delayed Draw), Senior Secured Loans, Due 12/21/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:AmeliaHoldingIiLlcMember		mcip:AmeliaHoldingIiLlcDelayedDrawMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	10.26%		10.26%
Investment, Interest Rate, Paid in Cash	14.16%		13.77%
Investment, Interest Rate, Paid in Kind	1.00%		1.00%
Investment, Acquisition Date	Dec. 21, 2022		Dec. 21, 2022
Investment Maturity Date	Dec. 21, 2027		Dec. 21, 2027
Investment Owned, Balance, Principal Amount	$ 3,333		$ 3,333
Investment, Identifier [Axis]: Amelia Holding II, LLC (Revolver), Senior Secured Loans, Due 12/21/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:AmeliaHoldingIiLlcMember		mcip:AmeliaHoldingIiLlcRevolverMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	10.26%		10.26%
Investment, Interest Rate, Paid in Cash	8.66%		13.77%
Investment, Interest Rate, Paid in Kind	1.00%		1.00%
Investment, Acquisition Date	Dec. 21, 2022		Dec. 21, 2022
Investment Maturity Date	Dec. 21, 2027		Dec. 21, 2027
Investment Owned, Balance, Principal Amount	$ 667		$ 667
Investment, Identifier [Axis]: Amelia Holding II, LLC, Equity Securities, Warrants
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:AmeliaHoldingIiLlcMember		mcip:AmeliaHoldingIiLlcMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Dec. 21, 2022		Dec. 21, 2022
Investment Maturity Date	Dec. 21, 2032		Dec. 21, 2032
Investment Owned, at Fair Value	$ 126
Investment, Identifier [Axis]: Amelia Holding II, LLC, Senior Secured Loans, Due 12/21/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:AmeliaHoldingIiLlcMember		mcip:AmeliaHoldingIiLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	10.26%		10.26%
Investment, Interest Rate, Paid in Cash	14.16%		13.77%
Investment, Interest Rate, Paid in Kind	1.00%		1.00%
Investment, Acquisition Date	Dec. 21, 2022		Dec. 21, 2022
Investment Maturity Date	Dec. 21, 2027		Dec. 21, 2027
Investment Owned, Balance, Principal Amount	$ 10,028		$ 10,000
Investment Owned, at Fair Value	$ 9,965		$ 9,700
Investment, Identifier [Axis]: American Broadband and Telecommunications Company LLC, Delayed Draw, Senior Loans, Due 6/10/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:AmericanBroadbandAndTelecommunicationsCompanyLlcMember		mcip:AmericanBroadbandAndTelecommunicationsCompanyLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Telecommunications		Telecommunications
Investment, Variable Interest Rate, Type [Extensible Enumeration]	us-gaap:PrimeRateMember		us-gaap:PrimeRateMember
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	12.00%		12.00%
Investment, Interest Rate, Paid in Cash	18.00%		17.50%
Investment, Interest Rate, Paid in Kind	2.00%		2.00%
Investment, Acquisition Date	Jun. 10, 2022		Jun. 10, 2022
Investment Maturity Date	Jun. 10, 2025		Jun. 10, 2025
Investment Owned, Balance, Principal Amount	$ 3,065		$ 3,377
Investment Owned, at Fair Value	$ 2,849		$ 3,079
Investment, Identifier [Axis]: American Broadband and Telecommunications Company LLC, Equity Securities
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:AmericanBroadbandandTelecommunicationsCompanyLLCMember		mcip:AmericanBroadbandandTelecommunicationsCompanyLLCMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Telecommunications		Telecommunications
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Jun. 10, 2022		Jun. 10, 2022
Investment Maturity Date	Jun. 10, 2032		Jun. 10, 2032
Investment Owned, at Fair Value	$ 130		$ 139
Investment, Identifier [Axis]: American Broadband and Telecommunications Company LLC, Revolver, Senior Loans, Due 6/10/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:AmericanBroadbandAndTelecommunicationsCompanyLlcMember		mcip:AmericanBroadbandAndTelecommunicationsCompanyLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Telecommunications		Telecommunications
Investment, Variable Interest Rate, Type [Extensible Enumeration]	us-gaap:PrimeRateMember		us-gaap:PrimeRateMember
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	12.00%		12.00%
Investment, Interest Rate, Paid in Cash	18.00%		17.50%
Investment, Interest Rate, Paid in Kind	2.00%		2.00%
Investment, Acquisition Date	Jun. 10, 2022		Jun. 10, 2022
Investment Maturity Date	Jun. 10, 2025		Jun. 10, 2025
Investment Owned, Balance, Principal Amount	$ 1,000		$ 1,000
Investment Owned, at Fair Value	$ 242		$ 236
Investment, Identifier [Axis]: American Virtual Cloud Technologies, Inc., Equity Securites, Warrants
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:AmericanVirtualCloudTechnologiesIncMember
Investment, Type [Extensible Enumeration]			Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]			Telecommunications
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Acquisition Date			Dec. 02, 2021
Investment Maturity Date			Jan. 31, 2029
Investment Owned, at Fair Value			$ 206
Investment, Identifier [Axis]: Aperture Companies, LLC (Revolver), Senior Secured Loans, Due 12/31/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ApertureCompaniesLlcMember		mcip:ApertureCompaniesLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	10.91%		10.37%
Investment, Interest Rate, Paid in Cash	8.07%		7.16%
Investment, Acquisition Date	Dec. 31, 2021		Dec. 31, 2021
Investment Maturity Date	Dec. 31, 2026		Dec. 31, 2026
Investment Owned, Balance, Principal Amount	$ 1,347		$ 1,347
Investment, Identifier [Axis]: Aperture Companies, LLC, Senior Secured Loans, One, Due 12/31/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ApertureCompaniesLlcMember		mcip:ApertureCompaniesLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	10.91%		10.37%
Investment, Acquisition Date	Dec. 31, 2021		Dec. 31, 2021
Investment Maturity Date	Dec. 31, 2026		Dec. 31, 2026
Investment Owned, Balance, Principal Amount	$ 14,850		$ 14,888
Investment Owned, at Fair Value	$ 14,281		$ 14,272
Investment, Identifier [Axis]: Aperture Companies, LLC, Senior Secured Loans, Two, Due 12/31/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ApertureCompaniesLlcMember		mcip:ApertureCompaniesLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	10.91%		10.58%
Investment, Acquisition Date	Dec. 31, 2021		Dec. 31, 2021
Investment Maturity Date	Dec. 31, 2026		Dec. 31, 2026
Investment Owned, Balance, Principal Amount	$ 4,315		$ 4,320
Investment Owned, at Fair Value	$ 4,150		$ 4,142
Investment, Identifier [Axis]: Appriss Health, LLC (Revolver), Senior Secured Loans, Due 5/6/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ApprissHealthLlcMember		mcip:ApprissHealthLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.25%		7.25%
Investment Interest Rate	11.93%
Investment, Interest Rate, Paid in Kind			11.54%
Investment, Acquisition Date	May 06, 2021		May 06, 2021
Investment Maturity Date	May 06, 2027		May 06, 2027
Investment Owned, Balance, Principal Amount	$ 433		$ 433
Investment Owned, at Fair Value	$ 217
Investment, Identifier [Axis]: Appriss Health, LLC, Senior Secured Loans, Due 5/6/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ApprissHealthLlcMember		mcip:ApprissHealthLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.25%		7.25%
Investment Interest Rate	11.96%		11.54%
Investment, Acquisition Date	May 06, 2021		May 06, 2021
Investment Maturity Date	May 06, 2027		May 06, 2027
Investment Owned, Balance, Principal Amount	$ 6,476		$ 6,484
Investment Owned, at Fair Value	$ 6,472		$ 6,497
Investment, Identifier [Axis]: Aras Corporation (Revolver), Senior Secured Loans, Due 4/13/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ArasCorporationMember		mcip:ArasCorporationMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.32%		9.50%
Investment, Acquisition Date	Apr. 13, 2021		Apr. 13, 2021
Investment Maturity Date	Apr. 13, 2027		Apr. 13, 2027
Investment Owned, Balance, Principal Amount	$ 325		$ 325
Investment Owned, at Fair Value	$ 216		$ 108
Investment, Identifier [Axis]: Aras Corporation, Senior Secured Loans, Due 4/13/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ArasCorporationMember		mcip:ArasCorporationMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment, Interest Rate, Paid in Kind	3.75%		3.75%
Investment, Acquisition Date	Apr. 13, 2021		Apr. 13, 2021
Investment Maturity Date	Apr. 13, 2027		Apr. 13, 2027
Investment Owned, Balance, Principal Amount	$ 4,714		$ 4,669
Investment Owned, at Fair Value	$ 4,690		$ 4,696
Investment, Identifier [Axis]: Arcstor Midco, LLC, Senior Secured Loans, Due 3/16/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ArcstorMidcoLLCMember		mcip:ArcstorMidcoLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.60%		7.60%
Investment, Interest Rate, Paid in Cash			8.17%
Investment, Interest Rate, Paid in Kind	3.75%		3.75%
Investment, Acquisition Date	Mar. 16, 2021		Mar. 16, 2021
Investment Maturity Date	Mar. 16, 2027		Mar. 16, 2027
Investment Owned, Balance, Principal Amount	$ 12,191		$ 12,075
Investment Owned, at Fair Value	$ 10,750		$ 10,992
Investment, Identifier [Axis]: Argano, LLC (Revolver), Senior Secured Loans, Due 6/10/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ArganoLlcMember		mcip:ArganoLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.50%		5.50%
Investment Interest Rate	10.26%		9.72%
Investment, Acquisition Date	Jun. 10, 2021		Jun. 10, 2021
Investment Maturity Date	Jun. 10, 2026		Jun. 10, 2026
Investment Owned, Balance, Principal Amount	$ 965		$ 965
Investment Owned, at Fair Value	$ 964		$ 496
Investment, Identifier [Axis]: Argano, LLC, Equity Securites, Common units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ArganoLlcMember		mcip:ArganoLlcMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Jun. 10, 2021		Jun. 10, 2021
Investment Owned, at Fair Value	$ 545		$ 418
Investment, Identifier [Axis]: Argano, LLC, Senior Secured Loans, Four, Due 6/10/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ArganoLlcMember		mcip:ArganoLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.50%		5.50%
Investment Interest Rate	10.27%		9.72%
Investment, Acquisition Date	Mar. 16, 2022		Mar. 16, 2022
Investment Maturity Date	Jun. 10, 2026		Jun. 10, 2026
Investment Owned, Balance, Principal Amount	$ 4,745		$ 4,757
Investment Owned, at Fair Value	$ 4,739		$ 4,704
Investment, Identifier [Axis]: Argano, LLC, Senior Secured Loans, One, Due 6/10/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ArganoLlcMember		mcip:ArganoLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.50%		5.50%
Investment Interest Rate	10.27%		9.72%
Investment, Acquisition Date	Jun. 10, 2021		Jun. 10, 2021
Investment Maturity Date	Jun. 10, 2026		Jun. 10, 2026
Investment Owned, Balance, Principal Amount	$ 8,963		$ 8,986
Investment Owned, at Fair Value	$ 8,952		$ 8,885
Investment, Identifier [Axis]: Argano, LLC, Senior Secured Loans, Three, Due 6/10/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ArganoLlcMember		mcip:ArganoLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.50%		5.50%
Investment Interest Rate	10.27%		9.72%
Investment, Acquisition Date	Oct. 07, 2022		Oct. 07, 2022
Investment Maturity Date	Jun. 10, 2026		Jun. 10, 2026
Investment Owned, Balance, Principal Amount	$ 689		$ 689
Investment Owned, at Fair Value	$ 689		$ 682
Investment, Identifier [Axis]: Argano, LLC, Senior Secured Loans, Two, Due 6/10/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ArganoLlcMember		mcip:ArganoLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.50%		5.50%
Investment Interest Rate	10.27%		9.72%
Investment, Acquisition Date	Jun. 10, 2021		Jun. 10, 2021
Investment Maturity Date	Jun. 10, 2026		Jun. 10, 2026
Investment Owned, Balance, Principal Amount	$ 3,969		$ 3,979
Investment Owned, at Fair Value	$ 3,964		$ 3,934
Investment, Identifier [Axis]: Arizona Natural Resources, LLC (Revolver), Senior Secured Loans, Due 5/18/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:ArizonaNaturalResourcesLlcMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Consumer Sector, Non- Durable [ Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Basis Spread, Variable Rate			6.50%
Investment Interest Rate			10.74%
Investment, Acquisition Date			May 18, 2021
Investment Maturity Date			May 18, 2026
Investment Owned, Balance, Principal Amount			$ 2,222
Investment Owned, at Fair Value			$ 1,759
Investment, Identifier [Axis]: Arizona Natural Resources, LLC (Revolver), Senior Secured Notes, due 5/18/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ArizonaNaturalResourcesLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Consumer Sector, Non- Durable [ Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	6.50%
Investment Interest Rate	11.28%
Investment, Acquisition Date	May 18, 2021
Investment Maturity Date	May 18, 2026
Investment Owned, Balance, Principal Amount	$ 2,222
Investment Owned, at Fair Value	$ 1,758
Investment, Identifier [Axis]: Arizona Natural Resources, LLC, Senior Secured Loans, Four, Due 5/18/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:ArizonaNaturalResourcesLlcMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Consumer Sector, Non- Durable [ Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Basis Spread, Variable Rate			6.50%
Investment Interest Rate			10.74%
Investment, Acquisition Date			Aug. 12, 2022
Investment Maturity Date			May 18, 2026
Investment Owned, Balance, Principal Amount			$ 2,958
Investment, Identifier [Axis]: Arizona Natural Resources, LLC, Senior Secured Loans, One, Due 5/18/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:ArizonaNaturalResourcesLlcMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Consumer Sector, Non- Durable [ Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.50%
Investment Interest Rate			10.74%
Investment, Acquisition Date			May 18, 2021
Investment Maturity Date			May 18, 2026
Investment Owned, Balance, Principal Amount			$ 13,825
Investment Owned, at Fair Value			$ 13,680
Investment, Identifier [Axis]: Arizona Natural Resources, LLC, Senior Secured Loans, Three, Due 5/18/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:ArizonaNaturalResourcesLlcMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Consumer Sector, Non- Durable [ Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Basis Spread, Variable Rate			6.50%
Investment Interest Rate			10.74%
Investment, Acquisition Date			Aug. 12, 2022
Investment Maturity Date			May 18, 2026
Investment Owned, Balance, Principal Amount			$ 6,884
Investment Owned, at Fair Value			$ 6,812
Investment, Identifier [Axis]: Arizona Natural Resources, LLC, Senior Secured Loans, Two, Due 5/18/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:ArizonaNaturalResourcesLlcMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Consumer Sector, Non- Durable [ Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.50%
Investment Interest Rate			10.74%
Investment, Acquisition Date			Dec. 15, 2021
Investment Maturity Date			May 18, 2026
Investment Owned, Balance, Principal Amount			$ 2,538
Investment Owned, at Fair Value			$ 2,511
Investment, Identifier [Axis]: Arizona Natural Resources, LLC, Senior Secured Notes, Four, due 5/18/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ArizonaNaturalResourcesLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Consumer Sector, Non- Durable [ Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	6.61%
Investment Interest Rate	11.42%
Investment, Acquisition Date	Aug. 12, 2022
Investment Maturity Date	May 18, 2026
Investment Owned, Balance, Principal Amount	$ 2,958
Investment Owned, at Fair Value	$ 2,958
Investment, Identifier [Axis]: Arizona Natural Resources, LLC, Senior Secured Notes, Three, due 5/18/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ArizonaNaturalResourcesLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Consumer Sector, Non- Durable [ Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	6.50%
Investment Interest Rate	11.28%
Investment, Acquisition Date	Aug. 12, 2022
Investment Maturity Date	May 18, 2026
Investment Owned, Balance, Principal Amount	$ 6,867
Investment Owned, at Fair Value	$ 6,791
Investment, Identifier [Axis]: Arizona Natural Resources, LLC, Senior Secured Notes, Two, due 5/18/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ArizonaNaturalResourcesLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Consumer Sector, Non- Durable [ Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	6.50%
Investment Interest Rate	11.28%
Investment, Acquisition Date	Dec. 15, 2021
Investment Maturity Date	May 18, 2026
Investment Owned, Balance, Principal Amount	$ 2,531
Investment Owned, at Fair Value	$ 2,504
Investment, Identifier [Axis]: Arizona Natural Resources, LLC, Senior Secured Notes, due 5/18/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ArizonaNaturalResourcesLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Consumer Sector, Non- Durable [ Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	6.50%
Investment Interest Rate	11.28%
Investment, Acquisition Date	May 18, 2021
Investment Maturity Date	May 18, 2026
Investment Owned, Balance, Principal Amount	$ 13,790
Investment Owned, at Fair Value	$ 13,638
Investment, Identifier [Axis]: Ascent Midco, LLC (Revolver), Senior Secured Loans, Due 2/5/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:AscentMidcoLLCMember		mcip:AscentMidcoLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	10.59%
Investment, Interest Rate, Paid in Kind			10.14%
Investment, Acquisition Date	Feb. 05, 2020		Feb. 05, 2020
Investment Maturity Date	Feb. 05, 2025		Feb. 05, 2025
Investment Owned, Balance, Principal Amount	$ 403		$ 403
Investment, Identifier [Axis]: Ascent Midco, LLC, Equity Securities, Class A units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:AscentMidcoLLCMember		mcip:AscentMidcoLLCMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]			Healthcare & Pharmaceuticals
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Interest Rate, Paid in Kind	8.00%		8.00%
Investment, Acquisition Date	Feb. 05, 2020		Feb. 05, 2020
Investment Owned, at Fair Value	$ 677		$ 703
Investment, Identifier [Axis]: Ascent Midco, LLC, Senior Secured Loans, Due 2/5/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:AscentMidcoLLCMember		mcip:AscentMidcoLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	10.59%
Investment, Interest Rate, Paid in Cash			10.14%
Investment, Acquisition Date	Feb. 05, 2020		Feb. 05, 2020
Investment Maturity Date	Feb. 05, 2025		Feb. 05, 2025
Investment Owned, Balance, Principal Amount	$ 2,205		$ 2,220
Investment Owned, at Fair Value	$ 2,190		$ 2,220
Investment, Identifier [Axis]: Avalara, Inc, Senior Secured Loans, Due 10/19/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:AvalaraInc.Member		mcip:AvalaraIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:FireFinanceMember		mcip:FireFinanceMember
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.25%		7.25%
Investment Interest Rate	12.15%		11.83%
Investment, Acquisition Date	Oct. 19, 2022		Oct. 19, 2022
Investment Maturity Date	Oct. 19, 2028		Oct. 19, 2028
Investment Owned, Balance, Principal Amount	$ 10,000		$ 10,000
Investment Owned, at Fair Value	$ 10,000		$ 9,750
Investment, Identifier [Axis]: Avalara, Inc. (Revolver), Senior Secured Loans, due 10/19/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:AvalaraInc.Member		mcip:AvalaraIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:FireFinanceMember		mcip:FireFinanceMember
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.25%		7.25%
Investment Interest Rate	12.15%		11.83%
Investment, Interest Rate, Paid in Cash	10.67%
Investment, Acquisition Date	Oct. 19, 2022		Oct. 19, 2022
Investment Maturity Date	Oct. 19, 2028		Oct. 19, 2028
Investment Owned, Balance, Principal Amount	$ 1,000		$ 1,000
Investment, Identifier [Axis]: Avison Young (USA) Inc, Senior Secured Loans, Due 1/30/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:AvisonYoungUSAIncMember		mcip:AvisonYoungUSAIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	FIRE Real Estate Sector [Member]		FIRE Real Estate Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	Non-US [Member]		country:US
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	10.67%		10.19%
Investment, Acquisition Date	Apr. 26, 2019		Apr. 26, 2019
Investment Maturity Date	Jan. 30, 2026		Jan. 30, 2026
Investment Owned, Balance, Principal Amount	$ 1,920		$ 1,925
Investment Owned, at Fair Value	$ 1,436		$ 1,612
Investment, Identifier [Axis]: Avison Young (USA) Inc, Senior Secured Loans, Due 9/1/2022
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:AvisonYoungUSAIncMember		mcip:AvisonYoungUSAIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	FIRE Real Estate Sector [Member]		FIRE Real Estate Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	Non-US [Member]		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment Interest Rate	11.92%		11.44%
Investment, Acquisition Date	Sep. 01, 2022		Sep. 01, 2022
Investment Maturity Date	Jan. 30, 2026		Jan. 30, 2026
Investment Owned, Balance, Principal Amount	$ 4,153		$ 4,163
Investment Owned, at Fair Value	$ 3,634		$ 3,726
Investment, Identifier [Axis]: B2B Industrial Products LLC, Senior Secured Loans, due 10/7/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:B2bIndustrialProductsLlcMember		mcip:B2bIndustrialProductsLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Containers, Packaging & Glass		Containers, Packaging & Glass
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	11.80%		11.41%
Investment, Acquisition Date	Dec. 06, 2022		Dec. 06, 2022
Investment Maturity Date	Oct. 07, 2026		Oct. 07, 2026
Investment Owned, Balance, Principal Amount	$ 9,975		$ 10,000
Investment Owned, at Fair Value	$ 9,965		$ 9,750
Investment, Identifier [Axis]: BTRS Holdings Inc (Delayed Draw), Senior Secured Loans, Due 12/15/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:BtrsHoldingsIncMember		mcip:BtrsHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	8.00%		8.00%
Investment Interest Rate	12.74%		12.50%
Investment, Acquisition Date	Dec. 16, 2022		Dec. 16, 2022
Investment Maturity Date	Dec. 15, 2028		Dec. 15, 2028
Investment Owned, Balance, Principal Amount	$ 845		$ 845
Investment Owned, at Fair Value	$ 100
Investment, Identifier [Axis]: BTRS Holdings Inc (Revolver), Senior Secured Loans, Due 12/15/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:BtrsHoldingsIncMember		mcip:BtrsHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.25%		8.00%
Investment Interest Rate	12.06%		12.50%
Investment, Acquisition Date	Dec. 16, 2022		Dec. 16, 2022
Investment Maturity Date	Dec. 15, 2028		Dec. 15, 2028
Investment Owned, Balance, Principal Amount	$ 1,067		$ 1,067
Investment Owned, at Fair Value	$ 147
Investment, Identifier [Axis]: BTRS Holdings Inc, Senior Secured Loans, Due 12/15/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:BtrsHoldingsIncMember		mcip:BtrsHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	8.00%		8.00%
Investment Interest Rate	12.74%		12.50%
Investment, Acquisition Date	Dec. 16, 2022		Dec. 16, 2022
Investment Maturity Date	Dec. 15, 2028		Dec. 15, 2028
Investment Owned, Balance, Principal Amount	$ 10,000		$ 10,000
Investment Owned, at Fair Value	$ 10,000		$ 9,700
Investment, Identifier [Axis]: Bonterra LLC (Delayed Draw), Senior Secured Loans, Due 9/8/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:BonterraLlcMember		mcip:BonterraLLCfkaCybergrantsHoldingsMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Diversified & Production		Media: Diversified & Production
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.25%
Investment Interest Rate	11.16%		10.98%
Investment, Acquisition Date	Sep. 08, 2021		Sep. 08, 2021
Investment Maturity Date	Sep. 08, 2027		Sep. 08, 2027
Investment Owned, Balance, Principal Amount	$ 1,457		$ 1,759
Investment, Identifier [Axis]: Bonterra LLC (Revolver), Senior Secured Loans, Due 9/8/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:BonterraLlcMember		mcip:BonterraLLCfkaCybergrantsHoldingsMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Diversified & Production		Media: Diversified & Production
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.25%
Investment Interest Rate	11.16%		10.98%
Investment, Acquisition Date	Sep. 08, 2021		Sep. 08, 2021
Investment Maturity Date	Sep. 08, 2027		Sep. 08, 2027
Investment Owned, Balance, Principal Amount	$ 1,814		$ 1,814
Investment Owned, at Fair Value	$ 1,744		$ 659
Investment, Identifier [Axis]: Bonterra LLC, Senior Secured Loans, Due 9/8/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:BonterraLlcMember		mcip:BonterraLLCfkaCybergrantsHoldingsMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Diversified & Production		Media: Diversified & Production
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.25%
Investment Interest Rate	11.16%		10.98%
Investment, Acquisition Date	Sep. 08, 2021		Sep. 08, 2021
Investment Maturity Date	Sep. 08, 2027		Sep. 08, 2027
Investment Owned, Balance, Principal Amount	$ 18,857		$ 18,555
Investment Owned, at Fair Value	$ 18,433		$ 18,432
Investment, Identifier [Axis]: Born To Run, LLC, Equity Securities, Class A units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:BornToRunLLCMember		mcip:BornToRunLLCMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Automotive		Automotive
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Apr. 01, 2021		Apr. 01, 2021
Investment Owned, at Fair Value	$ 285		$ 600
Investment, Identifier [Axis]: Born To Run, LLC, Senior Secured Loans, One, Due 4/1/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:BornToRunLLCMember		mcip:BornToRunLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Automotive		Automotive
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.00%
Investment Interest Rate	11.16%		10.73%
Investment, Acquisition Date	Apr. 01, 2021		Apr. 01, 2021
Investment Maturity Date	Apr. 01, 2027		Apr. 01, 2027
Investment Owned, Balance, Principal Amount	$ 8,843		$ 8,865
Investment Owned, at Fair Value	$ 8,024		$ 8,531
Investment, Identifier [Axis]: Born To Run, LLC, Senior Secured Loans, Two, Due 4/1/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:BornToRunLLCMember		mcip:BornToRunLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Automotive		Automotive
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.00%
Investment Interest Rate	11.16%		10.73%
Investment, Acquisition Date	Apr. 01, 2021		Apr. 01, 2021
Investment Maturity Date	Apr. 01, 2027		Apr. 01, 2027
Investment Owned, Balance, Principal Amount	$ 1,204		$ 1,207
Investment Owned, at Fair Value	$ 1,093		$ 1,162
Investment, Identifier [Axis]: Brickell Bay Acquisition Corp, Senior Secured Loans, Due 2/12/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:BrickellBayAcquisitionCorpMember		mcip:BrickellBayAcquisitionCorpMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.25%		10.24%
Investment, Interest Rate, Paid in Cash	10.60%		8.97%
Investment, Acquisition Date	Feb. 12, 2021		Feb. 12, 2021
Investment Maturity Date	Feb. 12, 2026		Feb. 12, 2026
Investment Owned, Balance, Principal Amount	$ 2,813		$ 2,820
Investment Owned, at Fair Value	$ 2,767		$ 2,771
Investment, Identifier [Axis]: Burgess Point Purchaser Corporation, Senior Secured Loans, Due 7/25/2029
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:BurgessPointPurchaserCorporationMember		mcip:BurgessPointPurchaserCorporationMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Automotive		Automotive
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.35%		5.35%
Investment Interest Rate	10.16%		9.67%
Investment, Acquisition Date	Jun. 30, 2022		Jun. 30, 2022
Investment Maturity Date	Jul. 25, 2029		Jul. 25, 2029
Investment Owned, Balance, Principal Amount	$ 4,988		$ 5,000
Investment Owned, at Fair Value	$ 4,771		$ 4,563
Investment, Identifier [Axis]: CE Intermediate, LLC, Senior Secured Loans, Due 7/1/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CeIntermediateLlcMember		mcip:CeIntermediateLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.50%		5.50%
Investment Interest Rate	10.50%		10.09%
Investment, Acquisition Date	Oct. 11, 2022		Oct. 11, 2022
Investment Maturity Date	Jul. 01, 2027		Jul. 01, 2027
Investment Owned, Balance, Principal Amount	$ 29,625		$ 29,812
Investment Owned, at Fair Value	$ 29,625		$ 29,067
Investment, Identifier [Axis]: CGI Automated Manufacturing, LLC, Senior Secured Loans, One, due 12/17/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CgiAutomatedManufacturingLlcMember		mcip:CgiAutomatedManufacturingLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Capital Equipment		Capital Equipment
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		6.50%
Investment Interest Rate	12.16%		11.34%
Investment, Acquisition Date	Sep. 09, 2022		Sep. 09, 2022
Investment Maturity Date	Dec. 17, 2026		Dec. 17, 2026
Investment Owned, Balance, Principal Amount	$ 8,888		$ 8,944
Investment Owned, at Fair Value	$ 8,788		$ 8,944
Investment, Identifier [Axis]: CGI Automated Manufacturing, LLC, Senior Secured Loans, Three, due 12/17/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CgiAutomatedManufacturingLlcMember		mcip:CgiAutomatedManufacturingLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Capital Equipment		Capital Equipment
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		6.50%
Investment Interest Rate	12.16%		11.34%
Investment, Acquisition Date	Sep. 09, 2022		Sep. 09, 2022
Investment Maturity Date	Dec. 17, 2026		Dec. 17, 2026
Investment Owned, Balance, Principal Amount	$ 10,821		$ 10,890
Investment Owned, at Fair Value	$ 10,700		$ 10,890
Investment, Identifier [Axis]: CGI Automated Manufacturing, LLC, Senior Secured Loans, Two, due 12/17/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CgiAutomatedManufacturingLlcMember		mcip:CgiAutomatedManufacturingLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Capital Equipment		Capital Equipment
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		6.50%
Investment Interest Rate	12.16%		11.34%
Investment, Acquisition Date	Sep. 30, 2022		Sep. 30, 2022
Investment Maturity Date	Dec. 17, 2026		Dec. 17, 2026
Investment Owned, Balance, Principal Amount	$ 5,655		$ 5,691
Investment Owned, at Fair Value	$ 5,592		$ 5,691
Investment, Identifier [Axis]: Calabrio, Inc., Revolver, Senior Loans, Two, Due 4/16/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CalabrioIncMember		mcip:CalabrioIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Telecommunications		Telecommunications
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment Interest Rate	11.95%		11.75%
Investment, Acquisition Date	Apr. 16, 2021		Apr. 16, 2021
Investment Maturity Date	Apr. 16, 2027		Apr. 16, 2027
Investment Owned, Balance, Principal Amount	$ 963		$ 963
Investment Owned, at Fair Value	$ 548		$ 547
Investment, Identifier [Axis]: Calabrio, Inc., Senior Loans, One, Due 4/16/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CalabrioIncMember		mcip:CalabrioIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Telecommunications		Telecommunications
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment Interest Rate	12.16%		11.73%
Investment, Acquisition Date	Apr. 16, 2021		Apr. 16, 2021
Investment Maturity Date	Apr. 16, 2027		Apr. 16, 2027
Investment Owned, Balance, Principal Amount	$ 8,000		$ 8,000
Investment Owned, at Fair Value	$ 7,960		$ 7,950
Investment, Identifier [Axis]: Calienger Holdings, L.L.C, Senior Secured Loans, Due 10/20/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CaliengerHoldingsL.l.cMember		mcip:CaliengerHoldingsL.l.cMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.10%		6.10%
Investment Interest Rate	10.77%		10.22%
Investment, Acquisition Date	Oct. 21, 2022		Oct. 21, 2022
Investment Maturity Date	Oct. 20, 2028		Oct. 20, 2028
Investment Owned, Balance, Principal Amount	$ 5,000		$ 5,000
Investment Owned, at Fair Value	$ 5,000		$ 4,875
Investment, Identifier [Axis]: Calienger Holdings, L.L.C. (Delayed Draw), Senior Secured Loans, Due 10/20/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CaliengerHoldingsL.l.cMember		mcip:CaliengerHoldingsL.l.cMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.10%		6.10%
Investment Interest Rate	10.77%		10.22%
Investment, Acquisition Date	Oct. 21, 2022		Oct. 21, 2022
Investment Maturity Date	Oct. 20, 2028		Oct. 20, 2028
Investment Owned, Balance, Principal Amount	$ 667		$ 667
Investment, Identifier [Axis]: Calienger Holdings, L.L.C. (Revolver), Senior Secured Loans, Due 10/20/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CaliengerHoldingsL.l.cMember		mcip:CaliengerHoldingsL.l.cMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.10%
Investment Interest Rate	10.67%		10.22%
Investment, Acquisition Date	Oct. 21, 2022		Oct. 21, 2022
Investment Maturity Date	Oct. 20, 2028		Oct. 20, 2028
Investment Owned, Balance, Principal Amount	$ 909		$ 909
Investment, Identifier [Axis]: Calienger Holdings, L.L.C., Equity Securites, Class A units)
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CaliengerHoldingsL.l.cMember		mcip:CaliengerHoldingsL.l.cMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Oct. 21, 2022		Oct. 21, 2022
Investment Owned, at Fair Value	$ 614		$ 568
Investment, Identifier [Axis]: Caravel Autism Health, LLC (Delayed Draw), Senior Secured Loans, Due 6/30/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CaravelAutismHealthLLCMember		mcip:CaravelAutismHealthLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.18%		8.75%
Investment, Interest Rate, Paid in Cash	10.60%		8.97%
Investment, Interest Rate, Paid in Kind	1.00%		3.00%
Investment, Acquisition Date	Jun. 30, 2021		Jun. 30, 2021
Investment Maturity Date	Jun. 30, 2027		Jun. 30, 2027
Investment Owned, Balance, Principal Amount	$ 6,002		$ 6,000
Investment Owned, at Fair Value	$ 1,358		$ 277
Investment, Identifier [Axis]: Caravel Autism Health, LLC (Revolver), Senior Secured Loans, Due 6/30/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CaravelAutismHealthLLCMember		mcip:CaravelAutismHealthLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.01%		8.75%
Investment, Interest Rate, Paid in Cash			3.00%
Investment, Interest Rate, Paid in Kind	1.00%
Investment, Acquisition Date	Jun. 30, 2021		Jun. 30, 2021
Investment Maturity Date	Jun. 30, 2027		Jun. 30, 2027
Investment Owned, Balance, Principal Amount	$ 2,027		$ 2,016
Investment Owned, at Fair Value	$ 1,307		$ 1,677
Investment, Identifier [Axis]: Caravel Autism Health, LLC, Senior Secured Loans, Due 6/30/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CaravelAutismHealthLLCMember		mcip:CaravelAutismHealthLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.01%		8.75%
Investment, Interest Rate, Paid in Cash	11.33%		8.97%
Investment, Interest Rate, Paid in Kind	1.00%		3.00%
Investment, Acquisition Date	Jun. 30, 2021		Jun. 30, 2021
Investment Maturity Date	Jun. 30, 2027		Jun. 30, 2027
Investment Owned, Balance, Principal Amount	$ 8,066		$ 8,025
Investment Owned, at Fair Value	$ 7,598		$ 7,409
Investment, Identifier [Axis]: Carrols Restaurant Group Inc, Senior Secured Loans, Due 4/30/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CarrolsRestaurantGroupIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Retail
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	3.35%
Investment Interest Rate	8.16%
Investment, Acquisition Date	Mar. 30, 2023
Investment Maturity Date	Apr. 30, 2026
Investment Owned, Balance, Principal Amount	$ 1,000
Investment Owned, at Fair Value	$ 930
Investment, Identifier [Axis]: Cassavant Holdings, LLC, Unitranche Loans, Due 9/8/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CassavantHoldingsLLCMember		mcip:CassavantHoldingsLLCMember
Investment, Type [Extensible Enumeration]	Unitranche Debt [Member]		Unitranche Debt [Member]
Investment, Industry Sector [Extensible Enumeration]			Aerospace & Defense
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.50%		6.50%
Investment Interest Rate	12.28%		10.62%
Investment, Acquisition Date	Sep. 08, 2021		Sep. 08, 2021
Investment Maturity Date	Sep. 08, 2026		Sep. 08, 2026
Investment Owned, Balance, Principal Amount	$ 13,231		$ 13,265
Investment Owned, at Fair Value	$ 13,033		$ 13,013
Investment, Identifier [Axis]: Centaur (Palm Beach) Owner LLC and Panther National Golf Club LLC (Revolver), Senior Secured Loans, Due 4/30/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CentaurPalmBeachOwnerLLCandPantherNationalGolfClubLLCMember		mcip:CentaurPalmBeachOwnerLLCandPantherNationalGolfClubLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	FIRE Real Estate Sector [Member]		FIRE Real Estate Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	8.25%		8.25%
Investment Interest Rate	12.95%		12.43%
Investment, Acquisition Date	May 03, 2022		May 03, 2022
Investment Maturity Date	Apr. 30, 2025		Apr. 30, 2025
Investment Owned, Balance, Principal Amount	$ 6,763		$ 8,016
Investment Owned, at Fair Value	$ 4,507		$ 3,488
Investment, Identifier [Axis]: Centaur (Palm Beach) Owner LLC and Panther National Golf Club LLC, Senior Secured Loans, One, Due 4/30/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CentaurPalmBeachOwnerLLCandPantherNationalGolfClubLLCMember		mcip:CentaurPalmBeachOwnerLLCandPantherNationalGolfClubLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	FIRE Real Estate Sector [Member]		FIRE Real Estate Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	8.25%		8.25%
Investment Interest Rate	12.95%		12.43%
Investment, Acquisition Date	May 03, 2022		May 03, 2022
Investment Maturity Date	Apr. 30, 2025		Apr. 30, 2025
Investment Owned, Balance, Principal Amount	$ 13,500		$ 16,000
Investment Owned, at Fair Value	$ 13,500		$ 15,980
Investment, Identifier [Axis]: Centaur (Palm Beach) Owner LLC and Panther National Golf Club LLC, Senior Secured Loans, Two, Due 4/30/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CentaurPalmBeachOwnerLLCandPantherNationalGolfClubLLCMember		mcip:CentaurPalmBeachOwnerLLCandPantherNationalGolfClubLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	FIRE Real Estate Sector [Member]		FIRE Real Estate Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	8.25%		8.25%
Investment Interest Rate	12.95%		12.43%
Investment, Acquisition Date	Mar. 05, 2022		May 03, 2022
Investment Maturity Date	Apr. 30, 2025		Apr. 30, 2025
Investment Owned, Balance, Principal Amount	$ 1,380		$ 1,635
Investment Owned, at Fair Value	$ 1,380		$ 1,633
Investment, Identifier [Axis]: Chess.com, LLC (Revolver), Senior Secured Loans, Due 12/31/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:Chess.comLLCMember		mcip:Chess.comLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Diversified & Production		Media: Diversified & Production
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.66%		11.23%
Investment, Acquisition Date	Dec. 31, 2021		Dec. 31, 2021
Investment Maturity Date	Dec. 31, 2027		Dec. 31, 2027
Investment Owned, Balance, Principal Amount	$ 1,413		$ 1,413
Investment, Identifier [Axis]: Chess.com, LLC, Equity Securities, Class A units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:Chess.comLLCMember		mcip:Chess.comLLCMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Diversified & Production		Media: Diversified & Production
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Dec. 31, 2021		Dec. 31, 2021
Investment Owned, at Fair Value	$ 107		$ 107
Investment, Identifier [Axis]: Chess.com, LLC, Senior Secured Loans, Due 12/31/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:Chess.comLLCMember		mcip:Chess.comLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Diversified & Production		Media: Diversified & Production
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.66%		11.23%
Investment, Acquisition Date	Dec. 31, 2021		Dec. 31, 2021
Investment Maturity Date	Dec. 31, 2027		Dec. 31, 2027
Investment Owned, Balance, Principal Amount	$ 12,870		$ 12,902
Investment Owned, at Fair Value	$ 12,693		$ 12,709
Investment, Identifier [Axis]: Clydesdale Holdings, LLC, Delayed Draw, Senior Loans, Due 6/23/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ClydesdaleHoldingsLlcMember		mcip:ClydesdaleHoldingsLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Consumer		Services: Consumer
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.65%		5.50%
Investment Interest Rate	10.55%		9.95%
Investment, Acquisition Date	Jun. 24, 2022		Jun. 24, 2022
Investment Maturity Date	Jun. 23, 2028		Jun. 23, 2028
Investment Owned, Balance, Principal Amount	$ 21,188		$ 21,221
Investment Owned, at Fair Value	$ 16,080		$ 11,650
Investment, Identifier [Axis]: Clydesdale Holdings, LLC, Revolver, Senior Loans, Due 6/23/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ClydesdaleHoldingsLlcMember		mcip:ClydesdaleHoldingsLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Consumer		Services: Consumer
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.65%		5.50%
Investment Interest Rate	10.55%		9.95%
Investment, Acquisition Date	Jun. 24, 2022		Jun. 24, 2022
Investment Maturity Date	Jun. 23, 2028		Jun. 23, 2028
Investment Owned, Balance, Principal Amount	$ 4,523		$ 4,523
Investment, Identifier [Axis]: Clydesdale Holdings, LLC, Senior Loans, Due 6/23/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ClydesdaleHoldingsLlcMember		mcip:ClydesdaleHoldingsLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Consumer		Services: Consumer
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.65%		5.50%
Investment Interest Rate	10.55%		9.01%
Investment, Acquisition Date	Jun. 24, 2022		Jun. 24, 2022
Investment Maturity Date	Jun. 23, 2028		Jun. 23, 2028
Investment Owned, Balance, Principal Amount	$ 14,925		$ 14,962
Investment Owned, at Fair Value	$ 14,895		$ 14,873
Investment, Identifier [Axis]: Complete Innovations Inc., Senior Loans, One, Due 12/16/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CompleteInnovationsInc.Member		mcip:CompleteInnovationsInc.Member
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Transportation Sector [Member]		Transportation Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	mcip:CanadianDollarOfferedRateMember		mcip:CanadianDollarOfferedRateMember
Investment, Issuer Geographic Region [Extensible Enumeration]	Non-US [Member]		country:US
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	11.67%		11.36%
Investment, Acquisition Date	Dec. 16, 2020		Dec. 16, 2020
Investment Maturity Date	Dec. 16, 2025		Dec. 16, 2025
Investment Owned, Balance, Principal Amount	$ 8,139		$ 8,116
Investment Owned, at Fair Value	$ 8,148		$ 8,080
Investment, Identifier [Axis]: Complete Innovations Inc., Senior Loans, Two, Due 12/16/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CompleteInnovationsInc.Member		mcip:CompleteInnovationsInc.Member
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Transportation Sector [Member]		Transportation Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	mcip:CanadianDollarOfferedRateMember		mcip:CanadianDollarOfferedRateMember
Investment, Issuer Geographic Region [Extensible Enumeration]	Non-US [Member]		country:US
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	11.67%		11.36%
Investment, Acquisition Date	Dec. 16, 2020		Dec. 16, 2020
Investment Maturity Date	Dec. 16, 2025		Dec. 16, 2025
Investment Owned, Balance, Principal Amount	$ 1,032		$ 1,029
Investment Owned, at Fair Value	$ 1,033		$ 1,025
Investment, Identifier [Axis]: Crownpeak Technology Inc. (Revolver) Senior Secured Loans, Due 2/28/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CrownpeakTechnologyIncMember		mcip:CrownpeakTechnologyIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Diversified & Production		Media: Diversified & Production
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.25%		7.25%
Investment Interest Rate	12.02%		11.47%
Investment, Acquisition Date	Feb. 28, 2019		Feb. 28, 2019
Investment Maturity Date	Feb. 28, 2025		Feb. 28, 2025
Investment Owned, Balance, Principal Amount	$ 125		$ 125
Investment, Identifier [Axis]: Crownpeak Technology, Inc, Senior Secured Loans, Four, Due 2/28/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CrownpeakTechnologyIncMember		mcip:CrownpeakTechnologyIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Diversified & Production		Media: Diversified & Production
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.25%		7.25%
Investment Interest Rate	12.02%		11.41%
Investment, Acquisition Date	Sep. 27, 2022		Sep. 27, 2022
Investment Maturity Date	Feb. 28, 2025		Feb. 28, 2025
Investment Owned, Balance, Principal Amount	$ 833		$ 833
Investment Owned, at Fair Value	$ 833		$ 833
Investment, Identifier [Axis]: Crownpeak Technology, Inc, Senior Secured Loans, One, Due 2/28/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CrownpeakTechnologyIncMember		mcip:CrownpeakTechnologyIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Diversified & Production		Media: Diversified & Production
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.25%		7.25%
Investment Interest Rate	12.02%		11.47%
Investment, Acquisition Date	Feb. 28, 2019		Feb. 28, 2019
Investment Maturity Date	Feb. 28, 2025		Feb. 28, 2025
Investment Owned, Balance, Principal Amount	$ 1,000		$ 1,000
Investment Owned, at Fair Value	$ 1,000		$ 1,000
Investment, Identifier [Axis]: Crownpeak Technology, Inc, Senior Secured Loans, Three, Due 2/28/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CrownpeakTechnologyIncMember		mcip:CrownpeakTechnologyIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Diversified & Production		Media: Diversified & Production
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.25%		7.25%
Investment Interest Rate	11.47%		11.47%
Investment, Acquisition Date	Sep. 27, 2022		Sep. 27, 2022
Investment Maturity Date	Feb. 28, 2025		Feb. 28, 2025
Investment Owned, Balance, Principal Amount	$ 318		$ 318
Investment Owned, at Fair Value	$ 318		$ 318
Investment, Identifier [Axis]: Crownpeak Technology, Inc, Senior Secured Loans, Two, Due 2/28/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:CrownpeakTechnologyIncMember		mcip:CrownpeakTechnologyIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Diversified & Production		Media: Diversified & Production
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.25%		7.25%
Investment Interest Rate	12.02%		11.47%
Investment, Acquisition Date	Feb. 28, 2019		Feb. 28, 2019
Investment Maturity Date	Feb. 28, 2025		Feb. 28, 2025
Investment Owned, Balance, Principal Amount	$ 15		$ 15
Investment Owned, at Fair Value	$ 15		$ 15
Investment, Identifier [Axis]: DataOnline Corp., Revolver, Senior Loans, Two, Due 11/13/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:DataonlineCorp.Member		mcip:DataonlineCorp.Member
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Telecommunications		Telecommunications
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	11.41%		10.98%
Investment, Acquisition Date	Nov. 13, 2019		Nov. 13, 2019
Investment Maturity Date	Nov. 13, 2025		Nov. 13, 2025
Investment Owned, Balance, Principal Amount	$ 844		$ 844
Investment Owned, at Fair Value	$ 824		$ 815
Investment, Identifier [Axis]: DataOnline Corp., Senior Loans, One, Due 11/13/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:DataonlineCorp.Member		mcip:DataonlineCorp.Member
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Telecommunications		Telecommunications
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	10.88%		10.98%
Investment, Acquisition Date	Nov. 13, 2019		Nov. 13, 2019
Investment Maturity Date	Nov. 13, 2025		Nov. 13, 2025
Investment Owned, Balance, Principal Amount	$ 6,289		$ 6,305
Investment Owned, at Fair Value	$ 6,138		$ 6,084
Investment, Identifier [Axis]: Denali Midco 2, LLC, Delayed Draw, Senior Loans, Due 12/22/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:DenaliMidco2LlcMember		mcip:DenaliMidco2LlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Consumer		Services: Consumer
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.41%		10.92%
Investment, Acquisition Date	Sep. 13, 2022		Sep. 13, 2022
Investment Maturity Date	Dec. 22, 2027		Dec. 22, 2027
Investment Owned, Balance, Principal Amount	$ 12,494		$ 12,500
Investment Owned, at Fair Value	$ 5,340		$ 2,496
Investment, Identifier [Axis]: Denali Midco 2, LLC, Senior Loans, Due 12/22/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:DenaliMidco2LlcMember		mcip:DenaliMidco2LlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Consumer		Services: Consumer
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.41%		10.92%
Investment, Acquisition Date	Sep. 13, 2022		Sep. 13, 2022
Investment Maturity Date	Dec. 22, 2027		Dec. 22, 2027
Investment Owned, Balance, Principal Amount	$ 12,438		$ 12,469
Investment Owned, at Fair Value	$ 12,469		$ 12,450
Investment, Identifier [Axis]: Dorado Acquisition, Inc, Equity Securities, Class A-2 units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:DoradoAcquisitionIncMember		mcip:DoradoAcquisitionInc.Member
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Jun. 30, 2021		Jun. 30, 2021
Investment Owned, at Fair Value	$ 843		$ 629
Investment, Identifier [Axis]: Dorado Acquisition, Inc, Senior Secured Loans, One, Due 6/30/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:DoradoAcquisitionInc.Member		mcip:DoradoAcquisitionIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.60%		6.50%
Investment Interest Rate	11.27%
Investment, Interest Rate, Paid in Kind			10.72%
Investment, Acquisition Date	Jun. 30, 2021		Jun. 30, 2021
Investment Maturity Date	Jun. 30, 2026		Jun. 30, 2026
Investment Owned, Balance, Principal Amount	$ 13,790		$ 13,825
Investment Owned, at Fair Value	$ 13,500		$ 13,797
Investment, Identifier [Axis]: Dorado Acquisition, Inc, Senior Secured Loans, Two, Due 6/30/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:DoradoAcquisitionInc.Member		mcip:DoradoAcquisitionIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.76%		6.76%
Investment Interest Rate	11.34%		11.34%
Investment, Acquisition Date	Nov. 27, 2022		Nov. 27, 2022
Investment Maturity Date	Jun. 30, 2026		Jun. 30, 2026
Investment Owned, Balance, Principal Amount	$ 11,429		$ 11,429
Investment Owned, at Fair Value	$ 11,189		$ 11,406
Investment, Identifier [Axis]: Dorado Acquisition, Inc. (Delayed Draw), Senior Secured Loans, Due 6/30/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:DoradoAcquisitionInc.Member		mcip:DoradoAcquisitionIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.60%		6.50%
Investment Interest Rate	11.27%		10.72%
Investment, Acquisition Date	Jun. 30, 2021		Jun. 30, 2021
Investment Maturity Date	Jun. 30, 2026		Jun. 30, 2026
Investment Owned, Balance, Principal Amount	$ 606		$ 606
Investment, Identifier [Axis]: Dorado Acquisition, Inc. (Revolver), Senior Secured Loans, Due 6/30/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:DoradoAcquisitionInc.Member		mcip:DoradoAcquisitionIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.60%		6.50%
Investment Interest Rate	11.27%		10.92%
Investment, Acquisition Date	Jun. 30, 2021		Jun. 30, 2021
Investment Maturity Date	Jun. 30, 2026		Jun. 30, 2026
Investment Owned, Balance, Principal Amount	$ 1,670		$ 1,670
Investment Owned, at Fair Value			$ 1,670
Investment, Identifier [Axis]: Dorado Acquisition, Inc., Equity Securities, Class A-1 units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:DoradoAcquisitionIncMember		mcip:DoradoAcquisitionInc.Member
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]			Healthcare & Pharmaceuticals
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Jun. 30, 2021		Jun. 30, 2021
Investment Owned, at Fair Value	$ 601		$ 601
Investment, Identifier [Axis]: Drawbridge Partners, LLC (Delayed Draw), Senior Secured Loans, due 9/1/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:DrawbridgePartnersLlcMember		mcip:DrawbridgePartnersLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment, Interest Rate, Paid in Kind	11.90%		11.56%
Investment, Acquisition Date	Sep. 01, 2022		Sep. 01, 2022
Investment Maturity Date	Sep. 01, 2028		Sep. 01, 2028
Investment Owned, Balance, Principal Amount	$ 1,649		$ 1,649
Investment Owned, at Fair Value	$ 965		$ 509
Investment, Identifier [Axis]: Drawbridge Partners, LLC (Revolver), Senior Secured Loans, due 9/1/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:DrawbridgePartnersLlcMember		mcip:DrawbridgePartnersLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment Interest Rate	11.90%		11.56%
Investment, Acquisition Date	Sep. 01, 2022		Sep. 01, 2022
Investment Maturity Date	Sep. 01, 2028		Sep. 01, 2028
Investment Owned, Balance, Principal Amount	$ 2,609		$ 2,609
Investment, Identifier [Axis]: Drawbridge Partners, LLC, Equity Securities, Class A-1 units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:DrawbridgePartnersLlcMember		mcip:DrawbridgePartnersLlcMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Sep. 01, 2022		Sep. 01, 2022
Investment Owned, at Fair Value	$ 649		$ 629
Investment, Identifier [Axis]: Drawbridge Partners, LLC, Senior Secured Loans, due 9/1/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:DrawbridgePartnersLlcMember		mcip:DrawbridgePartnersLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment Interest Rate	11.90%
Investment, Interest Rate, Paid in Kind			11.56%
Investment, Acquisition Date	Sep. 01, 2022		Sep. 01, 2022
Investment Maturity Date	Sep. 01, 2028		Sep. 01, 2028
Investment Owned, Balance, Principal Amount	$ 15,000		$ 15,000
Investment Owned, at Fair Value	$ 14,897		$ 14,854
Investment, Identifier [Axis]: EOS Finco S.A.R.L., Senior Loans, Due 8/20/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:EosFincoS.a.r.l.Member		mcip:EosFincoS.a.r.l.Member
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Telecommunications		Telecommunications
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	Non-US [Member]		Non-US [Member]
Investment, Basis Spread, Variable Rate	6.00%		6.00%
Investment Interest Rate	10.60%		9.61%
Investment, Acquisition Date	Aug. 03, 2022		Aug. 03, 2022
Investment Maturity Date	Aug. 20, 2027		Aug. 20, 2027
Investment Owned, Balance, Principal Amount	$ 1,250		$ 1,250
Investment Owned, at Fair Value	$ 1,236		$ 1,220
Investment, Identifier [Axis]: Edustaff, LLC (Revolver), Senior Secured Loans, Due 12/8/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:EdustaffLlcMember		mcip:EdustaffLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.10%
Investment Interest Rate	10.91%		10.42%
Investment, Acquisition Date	Dec. 08, 2022		Dec. 08, 2022
Investment Maturity Date	Dec. 08, 2027		Dec. 08, 2027
Investment Owned, Balance, Principal Amount	$ 2,364		$ 2,364
Investment, Identifier [Axis]: Edustaff, LLC, Equity Securites, Common stock
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:EdustaffLlcMember		mcip:EdustaffLlcMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Dec. 08, 2022		Dec. 08, 2022
Investment Owned, at Fair Value	$ 596		$ 591
Investment, Identifier [Axis]: Edustaff, LLC, Senior Secured Loans, Due 12/8/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:EdustaffLlcMember		mcip:EdustaffLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.10%
Investment Interest Rate	10.91%		10.42%
Investment, Acquisition Date	Dec. 08, 2022		Dec. 08, 2022
Investment Maturity Date	Dec. 08, 2027		Dec. 08, 2027
Investment Owned, Balance, Principal Amount	$ 12,968		$ 13,000
Investment Owned, at Fair Value	$ 13,032		$ 12,643
Investment, Identifier [Axis]: Equine Network, LLC (Revolver), Senior Secured Loans, Due 12/31/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:EquineNetworkLLCMember		mcip:EquineNetworkLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Hotels, Gaming & Leisure		Hotels, Gaming & Leisure
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.00%
Investment Interest Rate	10.78%		10.30%
Investment, Acquisition Date	Dec. 31, 2020		Dec. 31, 2020
Investment Maturity Date	Dec. 31, 2025		Dec. 31, 2025
Investment Owned, Balance, Principal Amount	$ 146		$ 146
Investment Owned, at Fair Value	$ 108		$ 109
Investment, Identifier [Axis]: Equine Network, LLC, Equity Securities, Class A units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:EquineNetworkLLCMember		mcip:EquineNetworkLLCMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Hotels, Gaming & Leisure		Hotels, Gaming & Leisure
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Dec. 31, 2020		Dec. 31, 2020
Investment Owned, at Fair Value	$ 85		$ 93
Investment, Identifier [Axis]: Equine Network, LLC, Senior Secured Loans, One, Due 12/31/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:EquineNetworkLLCMember		mcip:EquineNetworkLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Hotels, Gaming & Leisure		Hotels, Gaming & Leisure
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.00%
Investment Interest Rate	10.78%		10.24%
Investment, Acquisition Date	Dec. 31, 2020		Dec. 31, 2020
Investment Maturity Date	Dec. 31, 2025		Dec. 31, 2025
Investment Owned, Balance, Principal Amount	$ 1,470		$ 1,474
Investment Owned, at Fair Value	$ 1,452		$ 1,465
Investment, Identifier [Axis]: Equine Network, LLC, Senior Secured Loans, Three, Due 12/31/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:EquineNetworkLLCMember		mcip:EquineNetworkLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Hotels, Gaming & Leisure		Hotels, Gaming & Leisure
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.00%
Investment Interest Rate	10.78%		10.24%
Investment, Acquisition Date	Jan. 29, 2021		Dec. 31, 2020
Investment Maturity Date	Dec. 31, 2025		Dec. 31, 2025
Investment Owned, Balance, Principal Amount	$ 667		$ 366
Investment Owned, at Fair Value	$ 658
Investment, Identifier [Axis]: Equine Network, LLC, Senior Secured Loans, Two, Due 12/31/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:EquineNetworkLLCMember		mcip:EquineNetworkLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Hotels, Gaming & Leisure		Hotels, Gaming & Leisure
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.00%
Investment Interest Rate	10.81%		10.24%
Investment, Acquisition Date	Mar. 31, 2023		Jan. 29, 2021
Investment Maturity Date	Dec. 31, 2025		Dec. 31, 2025
Investment Owned, Balance, Principal Amount	$ 183		$ 668
Investment Owned, at Fair Value	$ 181		$ 664
Investment, Identifier [Axis]: Evolve Biologics Inc., Delayed Draw, Unitranche Loans, Due 12/18/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:EvolveBiologicsInc.Member		mcip:EvolveBiologicsInc.Member
Investment, Type [Extensible Enumeration]	Unitranche Debt [Member]		Unitranche Debt [Member]
Investment, Industry Sector [Extensible Enumeration]			Healthcare & Pharmaceuticals
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	Non-US [Member]		country:US
Investment, Basis Spread, Variable Rate	16.00%		8.00%
Investment Interest Rate			12.32%
Investment, Interest Rate, Paid in Cash	10.33%
Investment, Interest Rate, Paid in Kind	10.33%
Investment, Acquisition Date	Dec. 20, 2022		Dec. 20, 2022
Investment Maturity Date	Dec. 18, 2026		Dec. 18, 2026
Investment Owned, Balance, Principal Amount	$ 19,411		$ 19,411
Investment, Identifier [Axis]: Evolve Biologics Inc., Equity Securities, Equity commitments
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:EvolveBiologicsInc.Member		mcip:EvolveBiologicsInc.Member
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals
Investment, Issuer Geographic Region [Extensible Enumeration]	Non-US [Member]		Non-US [Member]
Investment, Acquisition Date	Dec. 20, 2022		Dec. 20, 2022
Investment, Identifier [Axis]: Evolve Biologics Inc., Equity Securities, Warrants
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:EvolveBiologicsInc.Member		mcip:EvolveBiologicsInc.Member
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals
Investment, Issuer Geographic Region [Extensible Enumeration]	Non-US [Member]		Non-US [Member]
Investment, Acquisition Date	Dec. 20, 2022		Dec. 20, 2022
Investment Maturity Date	Dec. 20, 2032
Investment Owned, at Fair Value	$ 191
Investment, Identifier [Axis]: Evolve Biologics Inc., Unitranche Loans, Due 12/18/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:EvolveBiologicsInc.Member		mcip:EvolveBiologicsInc.Member
Investment, Type [Extensible Enumeration]	Unitranche Debt [Member]		Unitranche Debt [Member]
Investment, Industry Sector [Extensible Enumeration]			Healthcare & Pharmaceuticals
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	Non-US [Member]		country:US
Investment, Basis Spread, Variable Rate	16.00%		8.00%
Investment Interest Rate			12.32%
Investment, Interest Rate, Paid in Cash	10.33%
Investment, Interest Rate, Paid in Kind	10.33%
Investment, Acquisition Date	Dec. 20, 2022		Dec. 20, 2022
Investment Maturity Date	Dec. 18, 2026		Dec. 18, 2026
Investment Owned, Balance, Principal Amount	$ 17,620		$ 17,271
Investment Owned, at Fair Value	$ 17,532		$ 16,925
Investment, Identifier [Axis]: Exiger LLC (Delayed Draw), Senior Secured Loans, Due 9/30/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ExigerLlcMember		mcip:ExigerLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:FireFinanceMember		mcip:FireFinanceMember
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	8.00%		8.00%
Investment, Interest Rate, Paid in Cash	10.67%		10.22%
Investment, Interest Rate, Paid in Kind	2.00%		2.00%
Investment, Acquisition Date	Aug. 26, 2022		Aug. 26, 2022
Investment Maturity Date	Sep. 30, 2027		Sep. 30, 2027
Investment Owned, Balance, Principal Amount	$ 7,000		$ 7,000
Investment, Identifier [Axis]: Exiger LLC (Revolver), Senior Secured Loans, Due 9/30/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ExigerLlcMember		mcip:ExigerLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:FireFinanceMember		mcip:FireFinanceMember
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	8.00%		8.00%
Investment, Interest Rate, Paid in Cash			10.22%
Investment, Interest Rate, Paid in Kind	2.00%		2.00%
Investment, Acquisition Date	Sep. 30, 2021		Sep. 30, 2021
Investment Maturity Date	Sep. 30, 2027		Sep. 30, 2027
Investment Owned, Balance, Principal Amount	$ 1,400		$ 1,400
Investment, Identifier [Axis]: Exiger LLC, Senior Secured Loans, One, Due 9/30/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ExigerLlcMember		mcip:ExigerLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:FireFinanceMember		mcip:FireFinanceMember
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	8.00%		8.00%
Investment Interest Rate			2.00%
Investment, Interest Rate, Paid in Cash	10.67%		10.22%
Investment, Interest Rate, Paid in Kind	2.00%
Investment, Acquisition Date	Sep. 30, 2021		Sep. 30, 2021
Investment Maturity Date	Sep. 30, 2027		Sep. 30, 2027
Investment Owned, Balance, Principal Amount	$ 14,190		$ 14,119
Investment Owned, at Fair Value	$ 14,169		$ 14,162
Investment, Identifier [Axis]: Exiger LLC, Senior Secured Loans, Three, Due 9/30/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ExigerLlcMember		mcip:ExigerLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:FireFinanceMember		mcip:FireFinanceMember
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	8.00%		8.00%
Investment, Interest Rate, Paid in Cash	10.67%		10.22%
Investment, Interest Rate, Paid in Kind	2.00%		2.00%
Investment, Acquisition Date	Sep. 30, 2021		Sep. 30, 2021
Investment Maturity Date	Sep. 30, 2027		Sep. 30, 2027
Investment Owned, Balance, Principal Amount	$ 4,244		$ 4,223
Investment Owned, at Fair Value	$ 4,237		$ 4,235
Investment, Identifier [Axis]: Exiger LLC, Senior Secured Loans, Two, Due 9/30/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ExigerLlcMember		mcip:ExigerLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:FireFinanceMember		mcip:FireFinanceMember
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	8.00%		8.00%
Investment, Interest Rate, Paid in Cash	10.67%		10.22%
Investment, Interest Rate, Paid in Kind	2.00%		2.00%
Investment, Acquisition Date	Aug. 26, 2022		Aug. 26, 2022
Investment Maturity Date	Sep. 30, 2027		Sep. 30, 2027
Investment Owned, Balance, Principal Amount	$ 1,980		$ 1,971
Investment Owned, at Fair Value	$ 1,978		$ 1,977
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Equity Securites, Class A units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ExpressWashAcquisitionCompanyLLCMember		mcip:ExpressWashAcquisitionCompanyLLCMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Consumer		Services: Consumer
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Interest Rate, Paid in Kind	8.00%		8.00%
Investment, Acquisition Date	Dec. 28, 2020		Dec. 28, 2020
Investment Owned, at Fair Value	$ 117		$ 132
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Revolver, Senior Loans, Due 7/14/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ExpressWashAcquisitionCompanyLlcMember		mcip:ExpressWashAcquisitionCompanyLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Consumer		Services: Consumer
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.35%		10.83%
Investment, Acquisition Date	Jul. 14, 2022		Jul. 14, 2022
Investment Maturity Date	Jul. 14, 2028		Jul. 14, 2028
Investment Owned, Balance, Principal Amount	$ 536		$ 536
Investment Owned, at Fair Value	$ 289		$ 293
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Senior Loans, One, Due 7/14/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ExpressWashAcquisitionCompanyLlcMember		mcip:ExpressWashAcquisitionCompanyLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Consumer		Services: Consumer
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.35%		10.32%
Investment, Acquisition Date	Jul. 14, 2022		Jul. 14, 2022
Investment Maturity Date	Jul. 14, 2028		Jul. 14, 2028
Investment Owned, Balance, Principal Amount	$ 11,500		$ 11,529
Investment Owned, at Fair Value	$ 11,284		$ 11,471
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Senior Loans, Two, Due 7/14/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ExpressWashAcquisitionCompanyLlcMember		mcip:ExpressWashAcquisitionCompanyLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Consumer		Services: Consumer
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.35%		10.43%
Investment, Acquisition Date	Jul. 14, 2022		Jul. 14, 2022
Investment Maturity Date	Jul. 14, 2028		Jul. 14, 2028
Investment Owned, Balance, Principal Amount	$ 2,154		$ 2,160
Investment Owned, at Fair Value	$ 2,114		$ 2,149
Investment, Identifier [Axis]: Fiasco Enterprises, LLC, Revolver, Senior Loans, Due 5/6/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:FiascoEnterprisesLlcMember		mcip:FiascoEnterprisesLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Transportation Sector [Member]		Transportation Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.61%		5.61%
Investment Interest Rate	10.28%		9.74%
Investment, Acquisition Date	May 06, 2022		May 06, 2022
Investment Maturity Date	May 06, 2027		May 06, 2027
Investment Owned, Balance, Principal Amount	$ 1,750		$ 1,750
Investment, Identifier [Axis]: Fiasco Enterprises, LLC, Senior Loans, One, Due 5/6/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:FiascoEnterprisesLlcMember		mcip:FiascoEnterprisesLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Transportation Sector [Member]		Transportation Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.61%		5.61%
Investment Interest Rate	10.28%		9.74%
Investment, Acquisition Date	May 06, 2022		May 06, 2022
Investment Maturity Date	May 06, 2027		May 06, 2027
Investment Owned, Balance, Principal Amount	$ 6,965		$ 6,983
Investment Owned, at Fair Value	$ 6,941		$ 6,965
Investment, Identifier [Axis]: Fiasco Enterprises, LLC, Senior Loans, Two, Due 5/6/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:FiascoEnterprisesLlcMember		mcip:FiascoEnterprisesLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Transportation Sector [Member]		Transportation Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.61%		6.61%
Investment Interest Rate	11.28%		10.95%
Investment, Acquisition Date	Dec. 15, 2022		Dec. 15, 2022
Investment Maturity Date	May 06, 2027		May 06, 2027
Investment Owned, Balance, Principal Amount	$ 8,400		$ 8,400
Investment Owned, at Fair Value	$ 8,400		$ 8,404
Investment, Identifier [Axis]: Florida East Coast Industries, L L C, Junior Secured Loans, due 6/28/2024
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:FloridaEastCoastIndustriesLLCMember
Investment, Type [Extensible Enumeration]			Junior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			FIRE: Real Estate
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Interest Rate, Paid in Cash			8.00%
Investment, Interest Rate, Paid in Kind			16.00%
Investment, Acquisition Date			Aug. 09, 2021
Investment Maturity Date			Jun. 28, 2024
Investment Owned, Balance, Principal Amount			$ 3,910
Investment Owned, at Fair Value			$ 3,925
Investment, Identifier [Axis]: Florida East Coast Industries, L L C, Senior Secured Loans, due 6/28/2024
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:FloridaEastCoastIndustriesLLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			FIRE Real Estate Sector [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment Interest Rate			10.50%
Investment, Acquisition Date			Aug. 09, 2021
Investment Maturity Date			Jun. 28, 2024
Investment Owned, Balance, Principal Amount			$ 1,356
Investment Owned, at Fair Value			$ 1,362
Investment, Identifier [Axis]: Florida East Coast Industries, LLC, Junior Secured Loans, Due 6/28/2024
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:FloridaEastCoastIndustriesLLCMember
Investment, Type [Extensible Enumeration]	Junior Loans [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	Non-US [Member]
Investment, Interest Rate, Paid in Kind	16.00%
Investment, Acquisition Date	Aug. 09, 2021
Investment Maturity Date	Jun. 28, 2024
Investment Owned, Balance, Principal Amount	$ 1,983
Investment Owned, at Fair Value	$ 1,983
Investment, Identifier [Axis]: Fueled Digital Media, LLC (Delayed Draw), Senior Secured Loans, Due 11/1/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:FueledDigitalMediaLlcMember		mcip:FueledDigitalMediaLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.11%		6.11%
Investment Interest Rate	10.78%		10.24%
Investment, Acquisition Date	Nov. 01, 2022		Nov. 01, 2022
Investment Maturity Date	Nov. 01, 2027		Nov. 01, 2027
Investment Owned, Balance, Principal Amount	$ 504		$ 504
Investment, Identifier [Axis]: Fueled Digital Media, LLC (Revolver), Senior Secured Loans, Due 11/1/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		us-gaap-supplement:InvestmentAffiliatedIssuerControlledMember
Investment, Issuer Name [Extensible Enumeration]	mcip:FueledDigitalMediaLlcMember		mcip:FueledDigitalMediaLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.11%		6.11%
Investment Interest Rate	10.78%		10.24%
Investment, Acquisition Date	Nov. 01, 2022		Nov. 01, 2022
Investment Maturity Date	Nov. 01, 2027		Nov. 01, 2027
Investment Owned, Balance, Principal Amount	$ 807		$ 807
Investment, Identifier [Axis]: Fueled Digital Media, LLC, Senior Secured Loans, Due 11/1/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:FueledDigitalMediaLlcMember		mcip:FueledDigitalMediaLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.11%		6.11%
Investment Interest Rate	10.78%		10.24%
Investment, Acquisition Date	Nov. 01, 2022		Nov. 01, 2022
Investment Maturity Date	Nov. 01, 2027		Nov. 01, 2027
Investment Owned, Balance, Principal Amount	$ 5,753		$ 5,753
Investment Owned, at Fair Value	$ 5,782		$ 5,609
Investment, Identifier [Axis]: FusionSite MidCo LLC (Delayed Draw), Senior Secured Loans, Due 10/4/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:FusionsiteMidcoLlcMember		mcip:FusionsiteMidcoLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.50%		5.50%
Investment Interest Rate	10.09%		9.91%
Investment, Acquisition Date	Oct. 04, 2022		Oct. 04, 2022
Investment Maturity Date	Oct. 04, 2027		Oct. 04, 2027
Investment Owned, Balance, Principal Amount	$ 7,569		$ 7,576
Investment Owned, at Fair Value	$ 2,571		$ 2,524
Investment, Identifier [Axis]: FusionSite MidCo LLC (Revolver), Senior Secured Loans, Due 10/4/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:FusionsiteMidcoLlcMember		mcip:FusionsiteMidcoLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.50%		5.50%
Investment Interest Rate	10.09%		9.06%
Investment, Acquisition Date	Oct. 04, 2022		Oct. 04, 2022
Investment Maturity Date	Oct. 04, 2027		Oct. 04, 2027
Investment Owned, Balance, Principal Amount	$ 1,326		$ 1,326
Investment, Identifier [Axis]: FusionSite MidCo LLC, Senior Secured Loans, Due 10/4/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:FusionsiteMidcoLlcMember		mcip:FusionsiteMidcoLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.50%		5.50%
Investment Interest Rate	10.09%		9.06%
Investment, Acquisition Date	Oct. 04, 2022		Oct. 04, 2022
Investment Maturity Date	Oct. 04, 2027		Oct. 04, 2027
Investment Owned, Balance, Principal Amount	$ 16,058		$ 16,098
Investment Owned, at Fair Value	$ 16,066		$ 15,777
Investment, Identifier [Axis]: GC Champion Acquisition LLC, Senior Secured Loans, One, Due 8/18/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:GCChampionAcquisitionLLCMember		mcip:GCChampionAcquisitionLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:FireFinanceMember		mcip:FireFinanceMember
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	11.15%		11.15%
Investment, Acquisition Date	Aug. 19, 2022		Aug. 19, 2022
Investment Maturity Date	Aug. 18, 2028		Aug. 18, 2028
Investment Owned, Balance, Principal Amount	$ 12,935		$ 12,967
Investment Owned, at Fair Value	$ 12,870		$ 12,838
Investment, Identifier [Axis]: GC Champion Acquisition LLC, Senior Secured Loans, Two, Due 8/18/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:GCChampionAcquisitionLLCMember		mcip:GCChampionAcquisitionLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:FireFinanceMember		mcip:FireFinanceMember
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	11.56%		11.15%
Investment, Acquisition Date	Aug. 19, 2022		Aug. 19, 2022
Investment Maturity Date	Aug. 18, 2028		Aug. 18, 2028
Investment Owned, Balance, Principal Amount	$ 3,611		$ 3,611
Investment Owned, at Fair Value	$ 3,593
Investment, Identifier [Axis]: Golden State Buyer, Inc, Senior Secured Loans, Due 6/21/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:GoldenStateBuyerIncMember		mcip:GoldenStateBuyerIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	4.75%		4.75%
Investment Interest Rate	9.66%		8.92%
Investment, Interest Rate, Paid in Cash	8.50%		8.08%
Investment, Acquisition Date	Aug. 25, 2022		Aug. 25, 2022
Investment Maturity Date	Jun. 19, 2026		Jun. 21, 2026
Investment Owned, Balance, Principal Amount	$ 9,921		$ 9,974
Investment Owned, at Fair Value	$ 9,648		$ 9,525
Investment, Identifier [Axis]: HS4 Acquisitionco, Inc, Senior Secured Loans, One, Due 7/9/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:HS4AcquisitioncoIncMember		mcip:HS4AcquisitioncoIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	11.59%		11.14%
Investment, Acquisition Date	Jul. 09, 2019		Jul. 09, 2019
Investment Maturity Date	Jul. 09, 2025		Jul. 09, 2025
Investment Owned, Balance, Principal Amount	$ 3,930		$ 3,940
Investment Owned, at Fair Value	$ 3,910		$ 3,922
Investment, Identifier [Axis]: HS4 Acquisitionco, Inc, Senior Secured Loans, Two, Due 7/9/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:HS4AcquisitioncoIncMember		mcip:HS4AcquisitioncoIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	11.59%		11.14%
Investment, Acquisition Date	Oct. 06, 2021		Oct. 06, 2021
Investment Maturity Date	Jul. 09, 2025		Jul. 09, 2025
Investment Owned, Balance, Principal Amount	$ 4,269		$ 4,280
Investment Owned, at Fair Value	$ 4,248		$ 4,261
Investment, Identifier [Axis]: HS4 Acquisitionco, Inc. (Revolver), Senior Secured Loans, Due 7/9/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:HS4AcquisitioncoIncMember		mcip:HS4AcquisitioncoIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	11.59%		11.14%
Investment, Acquisition Date	Jul. 09, 2019		Jul. 09, 2019
Investment Maturity Date	Jul. 09, 2025		Jul. 09, 2025
Investment Owned, Balance, Principal Amount	$ 325		$ 325
Investment Owned, at Fair Value	$ 185		$ 162
Investment, Identifier [Axis]: IDIG Parent, LLC, Equity Securites, Common stock
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:IDIGParentLLCMember		mcip:IDIGParentLLCMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Consumer		Services: Consumer
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Jan. 04, 2021		Jan. 04, 2021
Investment Owned, at Fair Value	$ 235		$ 254
Investment, Identifier [Axis]: IF & P Holdings Company, LLC, Equity Securities, Class A preferred units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:IfAndPHoldingsCompanyLlcMember		mcip:IfPHoldingsCompanyLlcMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Wholesale		Wholesale
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Oct. 03, 2022		Oct. 03, 2022
Investment Owned, at Fair Value	$ 1,572		$ 1,500
Investment, Identifier [Axis]: IF & P Holdings Company, LLC, Revolver, Senior Loans, Due 10/3/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:IfAndPHoldingsCompanyLlcMember		mcip:IfAndPHoldingsCompanyLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Wholesale
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.25%		5.25%
Investment Interest Rate	10.23%		10.09%
Investment, Acquisition Date	Oct. 06, 2022		Oct. 06, 2022
Investment Maturity Date	Oct. 03, 2028		Oct. 03, 2028
Investment Owned, Balance, Principal Amount	$ 2,800		$ 2,800
Investment Owned, at Fair Value	$ 1,456		$ 1,092
Investment, Identifier [Axis]: IF & P Holdings Company, LLC, Senior Loans, Due 10/3/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:IfAndPHoldingsCompanyLlcMember		mcip:IfAndPHoldingsCompanyLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Wholesale
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.25%		5.25%
Investment Interest Rate	10.14%		8.91%
Investment, Acquisition Date	Oct. 06, 2022		Oct. 06, 2022
Investment Maturity Date	Oct. 03, 2028		Oct. 03, 2028
Investment Owned, Balance, Principal Amount	$ 23,867		$ 23,867
Investment Owned, at Fair Value	$ 23,867		$ 23,270
Investment, Identifier [Axis]: IF & P Holdings Company, LLC, equity Securities, Class B common units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:IfAndPHoldingsCompanyLlcMember		mcip:IfPHoldingsCompanyLlcMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Wholesale		Wholesale
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Oct. 03, 2022		Oct. 03, 2022
Investment Owned, at Fair Value	$ 116
Investment, Identifier [Axis]: INH Buyer, Inc, Senior Secured Loans, Due 6/28/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:INHBuyerInc.Member		mcip:INHBuyerInc.Member
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment, Interest Rate, Paid in Cash			3.50%
Investment, Interest Rate, Paid in Kind	3.50%
Investment, Acquisition Date	Jun. 30, 2021		Jun. 30, 2021
Investment Maturity Date	Jun. 28, 2028		Jun. 28, 2028
Investment Owned, Balance, Principal Amount	$ 4,947		$ 4,916
Investment Owned, at Fair Value	$ 4,742		$ 4,720
Investment, Identifier [Axis]: Independence Buyer, Inc, Senior Secured Loans, Due 8/3/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:IndependenceBuyerInc.Member
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Consumer Goods: Durable
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			5.50%
Investment Interest Rate			9.74%
Investment, Acquisition Date			Aug. 03, 2021
Investment Maturity Date			Aug. 03, 2026
Investment Owned, Balance, Principal Amount			$ 12,375
Investment Owned, at Fair Value			$ 12,220
Investment, Identifier [Axis]: Independence Buyer, Inc, Senior Secured Loans, due 8/3/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:IndependenceBuyerInc.Member
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Consumer Goods: Durable
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	5.50%
Investment Interest Rate	10.33%
Investment, Acquisition Date	Aug. 03, 2021
Investment Maturity Date	Aug. 03, 2026
Investment Owned, Balance, Principal Amount	$ 11,544
Investment Owned, at Fair Value	$ 11,429
Investment, Identifier [Axis]: Independence Buyer, Inc. ( Revolver), Senior Secured Loans, due 8/3/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:IndependenceBuyerInc.Member
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Consumer Goods: Durable
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	5.50%
Investment Interest Rate	10.33%
Investment, Acquisition Date	Aug. 03, 2021
Investment Maturity Date	Aug. 03, 2026
Investment Owned, Balance, Principal Amount	$ 2,964
Investment, Identifier [Axis]: Independence Buyer, Inc. (Revolver), Senior Secured Loans, Due 8/3/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:IndependenceBuyerInc.Member
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Consumer Goods: Durable
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			5.50%
Investment Interest Rate			9.74%
Investment, Acquisition Date			Aug. 03, 2021
Investment Maturity Date			Aug. 03, 2026
Investment Owned, Balance, Principal Amount			$ 2,964
Investment, Identifier [Axis]: Independence Buyer, Inc., Equity Securities, Class A units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:IndependenceBuyerInc.Member		mcip:IndependenceBuyerInc.Member
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Consumer Goods: Durable		Consumer Goods: Durable
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Aug. 03, 2021		Aug. 03, 2021
Investment Owned, at Fair Value	$ 195		$ 212
Investment, Identifier [Axis]: InsideRE, LLC (Revolver), Senior Secured Loans, Due 12/22/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:InsidereLlcMember		mcip:InsidereLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	FIRE Real Estate Sector [Member]		FIRE Real Estate Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	10.70%		10.48%
Investment, Acquisition Date	Dec. 22, 2021		Dec. 22, 2021
Investment Maturity Date	Dec. 22, 2027		Dec. 22, 2027
Investment Owned, Balance, Principal Amount	$ 965		$ 965
Investment Owned, at Fair Value	$ 64		$ 64
Investment, Identifier [Axis]: InsideRE, LLC, Equity Securities, Class A common units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:InsidereLlcMember		mcip:InsidereLlcMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	FIRE Real Estate Sector [Member]		FIRE: Real Estate
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Sep. 09, 2019		Sep. 09, 2019
Investment Owned, at Fair Value	$ 658		$ 346
Investment, Identifier [Axis]: InsideRE, LLC, Senior Secured Loans, One, Due 12/22/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:InsidereLlcMember		mcip:InsidereLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	FIRE Real Estate Sector [Member]		FIRE Real Estate Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	10.91%		10.48%
Investment, Acquisition Date	Dec. 22, 2021		Dec. 22, 2021
Investment Maturity Date	Dec. 22, 2027		Dec. 22, 2027
Investment Owned, Balance, Principal Amount	$ 7,409		$ 7,427
Investment Owned, at Fair Value	$ 7,483		$ 7,305
Investment, Identifier [Axis]: InsideRE, LLC, Senior Secured Loans, Two, Due 12/22/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:InsidereLlcMember		mcip:InsidereLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	FIRE Real Estate Sector [Member]		FIRE Real Estate Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	10.91%		10.48%
Investment, Acquisition Date	Dec. 22, 2021		Dec. 22, 2021
Investment Maturity Date	Dec. 22, 2027		Dec. 22, 2027
Investment Owned, Balance, Principal Amount	$ 2,878		$ 2,886
Investment Owned, at Fair Value	$ 2,907
Investment, Identifier [Axis]: Inversiones DP6 (BVI) Numero Dos, Ltd., Delayed Draw, Unitranche Loans, Due 10/14/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:InversionesDp6BviNumeroDosLtd.Member		mcip:InversionesDp6BviNumeroDosLtd.Member
Investment, Type [Extensible Enumeration]	Unitranche Debt [Member]		Unitranche Debt [Member]
Investment, Industry Sector [Extensible Enumeration]			Construction & Building
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		Non-US [Member]
Investment, Interest Rate, Paid in Cash	9.00%		9.00%
Investment, Interest Rate, Paid in Kind	4.75%		4.75%
Investment, Acquisition Date	Oct. 14, 2022		Oct. 14, 2022
Investment Maturity Date	Oct. 14, 2026		Oct. 14, 2026
Investment Owned, Balance, Principal Amount	$ 25,291		$ 25,101
Investment Owned, at Fair Value	$ 16,107		$ 15,817
Investment, Identifier [Axis]: J2 BWA Funding III, LLC (Delayed Draw), Senior Secured Loans, Due 4/28/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	J2 BWA Funding III, LLC [Member]		mcip:J2BWAFundingLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:FireFinanceMember		mcip:FireFinanceMember
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment Interest Rate	9.00%		9.00%
Investment, Acquisition Date	Apr. 29, 2022		Dec. 24, 2020
Investment Maturity Date	Apr. 28, 2028		Dec. 24, 2026
Investment Owned, Balance, Principal Amount	$ 7,600		$ 2,850
Investment Owned, at Fair Value			$ 1,345
Investment, Identifier [Axis]: J2 BWA Funding III, LLC, Equity Securities, Equity Commitment, One
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:J2BWAFundingLLCMember		J2 BWA Funding III, LLC [Member]
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:FireFinanceMember		FIRE: Finance
Investment, Issuer Geographic Region [Extensible Enumeration]	Non-US [Member]		country:US
Investment, Acquisition Date	Apr. 29, 2022		Apr. 29, 2022
Investment Owned, at Fair Value			$ 76
Investment, Identifier [Axis]: J2 BWA Funding III, LLC, Equity Securities, Equity Commitment, Two
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:J2BWAFundingLLCMember		J2 BWA Funding III, LLC [Member]
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:FireFinanceMember		FIRE: Finance
Investment, Issuer Geographic Region [Extensible Enumeration]	Non-US [Member]		Non-US [Member]
Investment, Acquisition Date	Apr. 29, 2022		Apr. 29, 2022
Investment Owned, at Fair Value	$ 181
Investment, Identifier [Axis]: J2 BWA Funding LLC (Revolver), Senior Secured Loans, Due 12/24/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:J2BWAFundingLLCMember		mcip:J2BWAFundingLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:FireFinanceMember		mcip:FireFinanceMember
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment Interest Rate	9.00%		9.00%
Investment, Acquisition Date	Dec. 14, 2020		Apr. 29, 2022
Investment Maturity Date	Dec. 24, 2026		Apr. 28, 2028
Investment Owned, Balance, Principal Amount	$ 2,850		$ 7,600
Investment Owned, at Fair Value	$ 1,439
Investment, Identifier [Axis]: J2 BWA Funding LLC, Equity Securities, Profit Sharing
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:J2BWAFundingLLCMember		mcip:J2BWAFundingLLCMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:FireFinanceMember		FIRE: Finance
Investment, Issuer Geographic Region [Extensible Enumeration]	Non-US [Member]		country:US
Investment, Acquisition Date	Dec. 24, 2020		Dec. 24, 2020
Investment Owned, at Fair Value	$ 23
Investment, Identifier [Axis]: Jumpstart Holdco, Inc., Equity Securities, Class A units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:JumpstartHoldcoInc.Member		mcip:JumpstartHoldcoInc.Member
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Consumer Goods: Durable		Consumer Goods: Durable
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Apr. 19, 2022		Apr. 19, 2022
Investment Owned, at Fair Value	$ 775		$ 773
Investment, Identifier [Axis]: Jumpstart Holdco, Inc., Unitranche Loans, Due 4/19/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:JumpstartHoldcoInc.Member		mcip:JumpstartHoldcoInc.Member
Investment, Type [Extensible Enumeration]	Unitranche Debt [Member]		Unitranche Debt [Member]
Investment, Industry Sector [Extensible Enumeration]			Consumer Goods: Durable
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.65%		5.65%
Investment Interest Rate	10.28%		9.61%
Investment, Acquisition Date	Apr. 19, 2022		Apr. 19, 2022
Investment Maturity Date	Apr. 19, 2028		Apr. 19, 2028
Investment Owned, Balance, Principal Amount	$ 23,383		$ 23,441
Investment Owned, at Fair Value	$ 21,610		$ 21,857
Investment, Identifier [Axis]: KL Moon Acquisition, LLC (fka Spectrum Science Communications, LLC) (Delayed Draw), Senior Secured Loans, Due 2/1/2029
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:KlMoonAcquisitionLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	7.00%
Investment Interest Rate	12.04%
Investment, Acquisition Date	Feb. 01, 2023
Investment Maturity Date	Feb. 01, 2029
Investment Owned, Balance, Principal Amount	$ 3,404
Investment, Identifier [Axis]: KL Moon Acquisition, LLC (fka Spectrum Science Communications, LLC) (Revolver), Senior Secured Loans, Due 2/1/2029
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:KlMoonAcquisitionLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	7.00%
Investment Interest Rate	12.04%
Investment, Acquisition Date	Feb. 01, 2023
Investment Maturity Date	Feb. 01, 2029
Investment Owned, Balance, Principal Amount	$ 1,626
Investment Owned, at Fair Value	$ 263
Investment, Identifier [Axis]: KL Moon Acquisition, LLC (fka Spectrum Science Communications, LLC) Senior Secured Loans, Due 2/1/2029
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:KlMoonAcquisitionLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	7.00%
Investment Interest Rate	11.68%
Investment, Acquisition Date	Feb. 01, 2023
Investment Maturity Date	Feb. 01, 2029
Investment Owned, Balance, Principal Amount	$ 10,000
Investment Owned, at Fair Value	$ 9,700
Investment, Identifier [Axis]: KL Moon Acquisition, LLC, Equity Securities
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:KlMoonAcquisitionLlcMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Acquisition Date	Jan. 31, 2023
Investment Owned, at Fair Value	$ 981
Investment, Identifier [Axis]: Kenco PPC Buyer LLC, Delayed Draw, Senior Loans, Due 11/15/2029
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:KencoPpcBuyerLlcMember		mcip:KencoPpcBuyerLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Transportation Sector [Member]		Transportation Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.50%		5.50%
Investment Interest Rate	10.39%		9.77%
Investment, Acquisition Date	Nov. 17, 2022		Nov. 17, 2022
Investment Maturity Date	Nov. 15, 2029		Nov. 15, 2029
Investment Owned, Balance, Principal Amount	$ 3,870		$ 3,870
Investment, Identifier [Axis]: Kenco PPC Buyer LLC, Revolver, Senior Loans, Due 11/15/2029
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:KencoPpcBuyerLlcMember		mcip:KencoPpcBuyerLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Transportation Sector [Member]		Transportation Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.50%		5.50%
Investment Interest Rate	10.39%		9.77%
Investment, Acquisition Date	Nov. 17, 2022		Nov. 17, 2022
Investment Maturity Date	Nov. 15, 2029		Nov. 15, 2029
Investment Owned, Balance, Principal Amount	$ 4,787		$ 4,787
Investment, Identifier [Axis]: Kenco PPC Buyer LLC, Senior Loans, Due 11/15/2029
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:KencoPpcBuyerLlcMember		mcip:KencoPpcBuyerLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Transportation Sector [Member]		Transportation Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.50%		5.50%
Investment Interest Rate	10.39%		9.77%
Investment, Acquisition Date	Nov. 17, 2022		Nov. 17, 2022
Investment Maturity Date	Nov. 15, 2029		Nov. 15, 2029
Investment Owned, Balance, Principal Amount	$ 21,886		$ 21,941
Investment Owned, at Fair Value	$ 21,821		$ 21,393
Investment, Identifier [Axis]: Kingsley Gate Partners, LLC (Delayed Draw), Senior Secure Loans, One, Due 12/11/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:KingsleyGatePartnersLlcMember		mcip:KingsleyGatePartnersLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.65%		6.65%
Investment Interest Rate	11.12%		11.12%
Investment, Acquisition Date	Dec. 09, 2022		Dec. 09, 2022
Investment Maturity Date	Dec. 11, 2028		Dec. 11, 2028
Investment Owned, Balance, Principal Amount	$ 3,600		$ 3,600
Investment, Identifier [Axis]: Kingsley Gate Partners, LLC (Delayed Draw), Senior Secure Loans, Two, Due 12/11/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:KingsleyGatePartnersLlcMember		mcip:KingsleyGatePartnersLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.65%		6.65%
Investment Interest Rate	11.12%		11.12%
Investment, Acquisition Date	Dec. 09, 2022		Dec. 09, 2022
Investment Maturity Date	Dec. 11, 2028		Dec. 11, 2028
Investment Owned, Balance, Principal Amount	$ 3,000		$ 3,000
Investment, Identifier [Axis]: Kingsley Gate Partners, LLC (Revolver), Senior Secure Loans, Due 12/11/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:KingsleyGatePartnersLlcMember		mcip:KingsleyGatePartnersLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.65%		6.65%
Investment Interest Rate	11.12%		11.12%
Investment, Acquisition Date	Dec. 09, 2022		Dec. 09, 2022
Investment Maturity Date	Dec. 11, 2028		Dec. 11, 2028
Investment Owned, Balance, Principal Amount	$ 1,200		$ 1,200
Investment, Identifier [Axis]: Kingsley Gate Partners, LLC, Senior Secure Loans, Due 12/11/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:KingsleyGatePartnersLlcMember		mcip:KingsleyGatePartnersLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.65%		6.65%
Investment Interest Rate	11.12%		11.12%
Investment, Acquisition Date	Dec. 09, 2022		Dec. 09, 2022
Investment Maturity Date	Dec. 11, 2028		Dec. 11, 2028
Investment Owned, Balance, Principal Amount	$ 3,000		$ 3,000
Investment Owned, at Fair Value	$ 3,003		$ 2,940
Investment, Identifier [Axis]: L V F Holdings, Inc. ( Revolver), Senior Secured Loans, due 6/10/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:LVFHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:BeverageFoodAndTobaccoSectorMember
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	6.40%
Investment Interest Rate	11.30%
Investment, Acquisition Date	Jun. 10, 2021
Investment Maturity Date	Jun. 10, 2027
Investment Owned, Balance, Principal Amount	$ 554
Investment Owned, at Fair Value	$ 312
Investment, Identifier [Axis]: L V F Holdings, Inc., Senior Secured Loans, ( Delayed Draw) due 6/10/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:LVFHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:BeverageFoodAndTobaccoSectorMember
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	6.40%
Investment Interest Rate	11.30%
Investment, Acquisition Date	Jun. 10, 2021
Investment Maturity Date	Jun. 10, 2027
Investment Owned, Balance, Principal Amount	$ 802
Investment, Identifier [Axis]: L V F Holdings, Inc., Senior Secured Loans, One, due 6/10/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:LVFHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:BeverageFoodAndTobaccoSectorMember
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	6.40%
Investment Interest Rate	11.30%
Investment, Acquisition Date	Jun. 10, 2021
Investment Maturity Date	Jun. 10, 2027
Investment Owned, Balance, Principal Amount	$ 3,448
Investment Owned, at Fair Value	$ 3,348
Investment, Identifier [Axis]: L V F Holdings, Inc., Senior Secured Loans, Two, due 6/10/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:LVFHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:BeverageFoodAndTobaccoSectorMember
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	6.40%
Investment Interest Rate	11.30%
Investment, Acquisition Date	Jun. 10, 2021
Investment Maturity Date	Jun. 10, 2027
Investment Owned, Balance, Principal Amount	$ 3,299
Investment Owned, at Fair Value	$ 3,205
Investment, Identifier [Axis]: L X/ J T Intermediate Holdings, Inc. ( Revolver), Senior Secured Loans, due 3/11/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:LXJTIntermediateHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:BeverageFoodAndTobaccoSectorMember
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	6.00%
Investment Interest Rate	10.91%
Investment, Acquisition Date	Mar. 11, 2020
Investment Maturity Date	Mar. 11, 2025
Investment Owned, Balance, Principal Amount	$ 500
Investment, Identifier [Axis]: L X/ J T Intermediate Holdings, Inc., Senior Secured Loans, due 3/11/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:LXJTIntermediateHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:BeverageFoodAndTobaccoSectorMember
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	6.00%
Investment Interest Rate	10.91%
Investment, Acquisition Date	Mar. 11, 2020
Investment Maturity Date	Mar. 11, 2025
Investment Owned, Balance, Principal Amount	$ 3,266
Investment Owned, at Fair Value	$ 3,231
Investment, Identifier [Axis]: LVF Holdings, Inc, Senior Secured Loans, One, Due 6/10/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:LVFHoldingsIncMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Beverage, Food & Tobacco
Investment, Variable Interest Rate, Type [Extensible Enumeration]			LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.25%
Investment Interest Rate			8.45%
Investment, Acquisition Date			Oct. 06, 2021
Investment Maturity Date			Jun. 10, 2027
Investment Owned, Balance, Principal Amount			$ 3,456
Investment Owned, at Fair Value			$ 3,353
Investment, Identifier [Axis]: LVF Holdings, Inc, Senior Secured Loans, Two, Due 6/10/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:LVFHoldingsIncMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Beverage, Food & Tobacco
Investment, Variable Interest Rate, Type [Extensible Enumeration]			LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.25%
Investment Interest Rate			8.45%
Investment, Acquisition Date			Oct. 06, 2021
Investment Maturity Date			Jun. 10, 2027
Investment Owned, Balance, Principal Amount			$ 3,308
Investment Owned, at Fair Value			$ 3,208
Investment, Identifier [Axis]: LVF Holdings, Inc. (Delayed Draw), Senior Secured Loans, Due 6/10/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:LVFHoldingsIncMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Beverage, Food & Tobacco
Investment, Variable Interest Rate, Type [Extensible Enumeration]			LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.25%
Investment Interest Rate			8.45%
Investment, Acquisition Date			Jun. 10, 2021
Investment Maturity Date			Jun. 10, 2027
Investment Owned, Balance, Principal Amount			$ 802
Investment, Identifier [Axis]: LVF Holdings, Inc. (Revolver), Senior Secured Loans, Due 6/10/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:LVFHoldingsIncMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Beverage, Food & Tobacco
Investment, Variable Interest Rate, Type [Extensible Enumeration]			LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.25%
Investment Interest Rate			10.98%
Investment, Acquisition Date			Jun. 10, 2021
Investment Maturity Date			Jun. 10, 2027
Investment Owned, Balance, Principal Amount			$ 554
Investment Owned, at Fair Value			$ 355
Investment, Identifier [Axis]: LX/JT Intermediate Holdings, Inc, Senior Secured Loans, Due 3/11/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:LXJTIntermediateHoldingsIncMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Beverage, Food & Tobacco
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.00%
Investment Interest Rate			10.42%
Investment, Acquisition Date			Mar. 11, 2020
Investment Maturity Date			Mar. 11, 2025
Investment Owned, Balance, Principal Amount			$ 3,281
Investment Owned, at Fair Value			$ 3,237
Investment, Identifier [Axis]: LX/JT Intermediate Holdings, Inc. (Revolver), Senior Secured Loans, Due 3/11/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:LXJTIntermediateHoldingsIncMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Beverage, Food & Tobacco
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.00%
Investment Interest Rate			10.42%
Investment, Acquisition Date			Mar. 11, 2020
Investment Maturity Date			Mar. 11, 2025
Investment Owned, Balance, Principal Amount			$ 500
Investment, Identifier [Axis]: Lessen Inc, Senior Secured Loans, Due 1/5/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:LessenIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	FIRE Real Estate Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	8.50%
Investment Interest Rate	13.31%
Investment, Acquisition Date	Jan. 05, 2023
Investment Maturity Date	Jan. 05, 2028
Investment Owned, Balance, Principal Amount	$ 8,000
Investment Owned, at Fair Value	$ 7,680
Investment, Identifier [Axis]: Lessen Inc., Equity Securities
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:LessenIncMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	FIRE Real Estate Sector [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Acquisition Date	Jan. 05, 2023
Investment Owned, at Fair Value	$ 1,667
Investment, Identifier [Axis]: Lifted Trucks Holdings LLL, (Delayed Draw), Senior Secured Loans, Due 8/2/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:LiftedTrucksHoldingsLLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Automotive
Investment, Variable Interest Rate, Type [Extensible Enumeration]			LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			5.75%
Investment Interest Rate			9.49%
Investment, Acquisition Date			Aug. 02, 2021
Investment Maturity Date			Aug. 02, 2027
Investment Owned, Balance, Principal Amount			$ 2,000
Investment, Identifier [Axis]: Lifted Trucks Holdings, LLC (Revolver), Senior Secured Loans, Due 8/2/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:LiftedTrucksHoldingsLLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Automotive
Investment, Variable Interest Rate, Type [Extensible Enumeration]			LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			5.75%
Investment Interest Rate			9.49%
Investment, Acquisition Date			Aug. 02, 2021
Investment Maturity Date			Aug. 02, 2027
Investment Owned, Balance, Principal Amount			$ 2,381
Investment, Identifier [Axis]: Lifted Trucks Holdings, LLC, Equity Securities, Class A shares
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:LiftedTrucksHoldingsLLCMember		mcip:LiftedTrucksHoldingsLLCMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Automotive		Automotive
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Aug. 02, 2021		Aug. 02, 2021
Investment Owned, at Fair Value	$ 127		$ 111
Investment, Identifier [Axis]: Lifted Trucks Holdings, LLC, Senior Secured Loans, Due 8/2/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:LiftedTrucksHoldingsLLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Automotive
Investment, Variable Interest Rate, Type [Extensible Enumeration]			LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			5.75%
Investment Interest Rate			9.49%
Investment, Acquisition Date			Aug. 02, 2021
Investment Maturity Date			Aug. 02, 2027
Investment Owned, Balance, Principal Amount			$ 9,900
Investment Owned, at Fair Value			$ 9,771
Investment, Identifier [Axis]: Lifted Trucks Holdings, LLC. Senior Secured Loans, One, Due 8/2/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:LiftedTrucksHoldingsLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Automotive
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	5.75%
Investment Interest Rate	10.50%
Investment, Acquisition Date	Aug. 02, 2021
Investment Maturity Date	Aug. 02, 2027
Investment Owned, Balance, Principal Amount	$ 9,900
Investment Owned, at Fair Value	$ 9,806
Investment, Identifier [Axis]: Lifted Trucks Holdings, LLC. Senior Secured Loans, Two, Due 8/2/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:LiftedTrucksHoldingsLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Automotive
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	5.75%
Investment Interest Rate	10.54%
Investment, Acquisition Date	Aug. 02, 2021
Investment Maturity Date	Aug. 02, 2027
Investment Owned, Balance, Principal Amount	$ 2,381
Investment Owned, at Fair Value	$ 314
Investment, Identifier [Axis]: Light Wave Dental Management, LLC, , Junior Secured Loans, Due 9/30/2023
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Light Wave Dental Management, LLC [Member]		Light Wave Dental Management, LLC [Member]
Investment, Type [Extensible Enumeration]	Junior Loans [Member]		Junior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Services: Consumer
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Dec. 06, 2022		Dec. 06, 2022
Investment Maturity Date	Sep. 30, 2023		Sep. 30, 2023
Investment Owned, Balance, Principal Amount	$ 2,479		$ 2,479
Investment Owned, at Fair Value	$ 2,954		$ 3,032
Investment, Identifier [Axis]: Light Wave Dental Management, LLC, Delayed Draw, Senior Loans, Due 1/2/2024
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Light Wave Dental Management, LLC [Member]		Light Wave Dental Management, LLC [Member]
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Consumer		Services: Consumer
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.66%		11.32%
Investment, Acquisition Date	Jun. 24, 2022		Jun. 24, 2022
Investment Maturity Date	Jan. 02, 2024		Jan. 02, 2024
Investment Owned, Balance, Principal Amount	$ 11,455		$ 11,464
Investment Owned, at Fair Value	$ 3,283		$ 3,295
Investment, Identifier [Axis]: Light Wave Dental Management, LLC, Revolver, Senior Loans, Due 1/2/2024
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Light Wave Dental Management, LLC [Member]		Light Wave Dental Management, LLC [Member]
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Consumer		Services: Consumer
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.66%		11.32%
Investment, Acquisition Date	May 03, 2021		May 03, 2021
Investment Maturity Date	Jan. 02, 2024		Jan. 02, 2024
Investment Owned, Balance, Principal Amount	$ 187		$ 187
Investment Owned, at Fair Value	$ 186		$ 187
Investment, Identifier [Axis]: Light Wave Dental Management, LLC, Senior Loans, Four, Due 1/2/2024
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Light Wave Dental Management, LLC [Member]		Light Wave Dental Management, LLC [Member]
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Consumer		Services: Consumer
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.66%		11.32%
Investment, Acquisition Date	Aug. 03, 2021		Aug. 03, 2021
Investment Maturity Date	Jan. 02, 2024		Jan. 02, 2024
Investment Owned, Balance, Principal Amount	$ 3,373		$ 3,382
Investment Owned, at Fair Value	$ 3,367		$ 3,379
Investment, Identifier [Axis]: Light Wave Dental Management, LLC, Senior Loans, One, Due 1/2/2024
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Light Wave Dental Management, LLC [Member]		Light Wave Dental Management, LLC [Member]
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Consumer		Services: Consumer
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.66%		11.32%
Investment, Acquisition Date	Aug. 01, 2019		Aug. 01, 2019
Investment Maturity Date	Jan. 02, 2024		Jan. 02, 2024
Investment Owned, Balance, Principal Amount	$ 2,024		$ 2,029
Investment Owned, at Fair Value	$ 2,020		$ 2,027
Investment, Identifier [Axis]: Light Wave Dental Management, LLC, Senior Loans, Three, Due 1/2/2024
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Light Wave Dental Management, LLC [Member]		Light Wave Dental Management, LLC [Member]
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Consumer		Services: Consumer
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.66%		11.32%
Investment, Acquisition Date	Aug. 03, 2021		Aug. 03, 2021
Investment Maturity Date	Jan. 02, 2024		Jan. 02, 2024
Investment Owned, Balance, Principal Amount	$ 1,352		$ 1,356
Investment Owned, at Fair Value	$ 1,350		$ 1,354
Investment, Identifier [Axis]: Light Wave Dental Management, LLC, Senior Loans, Two, Due 1/2/2024
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Light Wave Dental Management, LLC [Member]		Light Wave Dental Management, LLC [Member]
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Consumer		Services: Consumer
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.66%		11.32%
Investment, Acquisition Date	May 03, 2021		May 03, 2021
Investment Maturity Date	Jan. 02, 2024		Jan. 02, 2024
Investment Owned, Balance, Principal Amount	$ 1,466		$ 1,469
Investment Owned, at Fair Value	$ 1,463		$ 1,468
Investment, Identifier [Axis]: Liquid Tech Solutions Holdings, LLC, Senior Secured Loans, due 3/17/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:LiquidTechSolutionsHoldingsLlcMember		mcip:LiquidTechSolutionsHoldingsLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Energy, Oil and Gas Sector [Member]		Energy, Oil and Gas Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	4.75%		4.75%
Investment Interest Rate	9.71%		8.92%
Investment, Acquisition Date	Mar. 18, 2021		Mar. 18, 2021
Investment Maturity Date	Mar. 17, 2028		Mar. 17, 2028
Investment Owned, Balance, Principal Amount	$ 2,243		$ 2,248
Investment Owned, at Fair Value	$ 2,170		$ 2,147
Investment, Identifier [Axis]: M C P Shaw Acquisitionco, L L C ( Revolver), Senior Secured Loans, due 11/28/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:MCPShawAcquisitioncoLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Capital Equipment
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	6.00%
Investment Interest Rate	11.16%
Investment, Acquisition Date	Feb. 28, 2020
Investment Maturity Date	Nov. 28, 2025
Investment Owned, Balance, Principal Amount	$ 1,427
Investment, Identifier [Axis]: M C P Shaw Acquisitionco, L L C, Senior Secured Loans, One, due 11/28/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:MCPShawAcquisitioncoLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Capital Equipment
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	6.00%
Investment Interest Rate	11.16%
Investment, Acquisition Date	Feb. 28, 2020
Investment Maturity Date	Nov. 28, 2025
Investment Owned, Balance, Principal Amount	$ 7,757
Investment Owned, at Fair Value	$ 7,753
Investment, Identifier [Axis]: M C P Shaw Acquisitionco, L L C, Senior Secured Loans, Two, due 11/28/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:MCPShawAcquisitioncoLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Capital Equipment
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	6.00%
Investment Interest Rate	10.90%
Investment, Acquisition Date	Dec. 29, 2021
Investment Maturity Date	Nov. 28, 2025
Investment Owned, Balance, Principal Amount	$ 2,372
Investment Owned, at Fair Value	$ 2,371
Investment, Identifier [Axis]: M V Receivables I I, L L C ( Delayed Draw), Senior Secured Loans, due 7/29/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:MVReceivablesIILLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Banking
Investment, Variable Interest Rate, Type [Extensible Enumeration]			LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			9.75%
Investment Interest Rate			13.87%
Investment, Acquisition Date			Jul. 29, 2021
Investment Maturity Date			Jul. 29, 2026
Investment Owned, Balance, Principal Amount			$ 10,144
Investment Owned, at Fair Value			$ 9,960
Investment, Identifier [Axis]: MCP Shaw Acquisitionco, LLC (Revolver), Senior Secured Loans, Due 11/28/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:MCPShawAcquisitioncoLLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Capital Equipment
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.50%
Investment Interest Rate			11.06%
Investment, Acquisition Date			Feb. 28, 2020
Investment Maturity Date			Nov. 28, 2025
Investment Owned, Balance, Principal Amount			$ 1,427
Investment, Identifier [Axis]: MCP Shaw Acquisitionco, LLC, Equity Securities, Class A-2 units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:MCPShawAcquisitioncoLLCMember		mcip:MCPShawAcquisitioncoLLCMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Capital Equipment		Capital Equipment
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Feb. 28, 2020		Feb. 28, 2020
Investment Owned, at Fair Value	$ 268		$ 163
Investment, Identifier [Axis]: MCP Shaw Acquisitionco, LLC, Senior Secured Loans, One, Due 11/28/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:MCPShawAcquisitioncoLLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Capital Equipment
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.50%
Investment Interest Rate			11.06%
Investment, Acquisition Date			Feb. 28, 2020
Investment Maturity Date			Nov. 28, 2025
Investment Owned, Balance, Principal Amount			$ 7,777
Investment Owned, at Fair Value			$ 7,789
Investment, Identifier [Axis]: MCP Shaw Acquisitionco, LLC, Senior Secured Loans, Three, due 11/28/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:MCPShawAcquisitioncoLLCMember		mcip:MCPShawAcquisitioncoLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Capital Equipment		Capital Equipment
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.50%
Investment Interest Rate	10.90%		11.06%
Investment, Acquisition Date	Dec. 29, 2021		Dec. 29, 2021
Investment Maturity Date	Nov. 28, 2025		Nov. 28, 2025
Investment Owned, Balance, Principal Amount	$ 780		$ 782
Investment Owned, at Fair Value	$ 780		$ 783
Investment, Identifier [Axis]: MCP Shaw Acquisitionco, LLC, Senior Secured Loans, Two, Due 11/28/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:MCPShawAcquisitioncoLLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Capital Equipment
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.50%
Investment Interest Rate			11.06%
Investment, Acquisition Date			Dec. 29, 2021
Investment Maturity Date			Nov. 28, 2025
Investment Owned, Balance, Principal Amount			$ 2,378
Investment Owned, at Fair Value			$ 2,381
Investment, Identifier [Axis]: MPH Acquisition Holdings LLC, Senior Secured Loans, Due 9/1/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:MphAcquisitionHoldingsLlcMember		mcip:MphAcquisitionHoldingsLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	4.25%		4.25%
Investment Interest Rate	9.20%
Investment, Interest Rate, Paid in Kind			8.98%
Investment, Acquisition Date	Sep. 20, 2022		Sep. 20, 2022
Investment Maturity Date	Sep. 01, 2028		Sep. 01, 2028
Investment Owned, Balance, Principal Amount	$ 3,544		$ 3,553
Investment Owned, at Fair Value	$ 3,046		$ 3,052
Investment, Identifier [Axis]: MV Receivables II, LLC, Equity Securities, Common stock
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:MVReceivablesIILLCMember		mcip:MVReceivablesIILLCMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Banking		Banking
Investment, Issuer Geographic Region [Extensible Enumeration]	Non-US [Member]		Non-US [Member]
Investment, Acquisition Date	Jul. 29, 2021		Jul. 29, 2021
Investment Owned, at Fair Value	$ 1,049		$ 1,443
Investment, Identifier [Axis]: MV Receivables II, LLC, Equity Securities, Warrants
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:MVReceivablesIILLCMember		mcip:MVReceivablesIILLCMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Banking		Banking
Investment, Issuer Geographic Region [Extensible Enumeration]	Non-US [Member]		Non-US [Member]
Investment, Acquisition Date	Jul. 28, 2021		Jul. 28, 2021
Investment Maturity Date	Jul. 28, 2031		Jul. 28, 2031
Investment Owned, at Fair Value	$ 1,504		$ 2,069
Investment, Identifier [Axis]: MV Receivables II, LLC, Senior Secured Loans, due 7/29/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:MVReceivablesIILLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Banking
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	9.75%
Investment Interest Rate	14.41%
Investment, Acquisition Date	Jul. 29, 2021
Investment Maturity Date	Jul. 29, 2026
Investment Owned, Balance, Principal Amount	$ 10,163
Investment Owned, at Fair Value	$ 9,742
Investment, Identifier [Axis]: Madison Logic Holdings, Inc, Senior Secured Loans, Due 12/29/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:MadisonLogicHoldingsIncMember		mcip:MadisonLogicHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment Interest Rate	11.90%		11.58%
Investment, Acquisition Date	Dec. 30, 2022		Dec. 30, 2022
Investment Maturity Date	Dec. 29, 2028		Dec. 29, 2028
Investment Owned, Balance, Principal Amount	$ 14,000		$ 14,000
Investment Owned, at Fair Value	$ 14,000		$ 13,580
Investment, Identifier [Axis]: Madison Logic Holdings, Inc. (Revolver), Senior Secured Loans, Due 12/29/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:MadisonLogicHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	7.00%
Investment Interest Rate	11.90%
Investment, Acquisition Date	Dec. 30, 2022
Investment Maturity Date	Dec. 30, 2027
Investment Owned, Balance, Principal Amount	$ 1,207
Investment, Identifier [Axis]: Madison Logic Holdings, Inc. (Revolver), Senior Secured Loans, Due 12/30/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:MadisonLogicHoldingsIncMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			7.00%
Investment Interest Rate			11.58%
Investment, Acquisition Date			Dec. 30, 2022
Investment Maturity Date			Dec. 30, 2027
Investment Owned, Balance, Principal Amount			$ 1,207
Investment, Identifier [Axis]: Mark Logic Corporation ( Revolver), Senior Secured Loans, due 10/20/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:MarkLogicCorporationMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.50%
Investment Interest Rate			10.85%
Investment, Acquisition Date			Oct. 20, 2020
Investment Maturity Date			Oct. 20, 2025
Investment Owned, Balance, Principal Amount			$ 404
Investment, Identifier [Axis]: Mark Logic Corporation, Senior Secured Loans, Four, due 10/20/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:MarkLogicCorporationMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.50%
Investment Interest Rate			10.85%
Investment, Acquisition Date			Nov. 23, 2021
Investment Maturity Date			Oct. 20, 2025
Investment Owned, Balance, Principal Amount			$ 321
Investment Owned, at Fair Value			$ 320
Investment, Identifier [Axis]: Mark Logic Corporation, Senior Secured Loans, One, due 10/20/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:MarkLogicCorporationMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.50%
Investment Interest Rate			10.85%
Investment, Acquisition Date			May 10, 2022
Investment Maturity Date			Oct. 20, 2025
Investment Owned, Balance, Principal Amount			$ 4,003
Investment Owned, at Fair Value			$ 3,985
Investment, Identifier [Axis]: Mark Logic Corporation, Senior Secured Loans, Three, due 10/20/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:MarkLogicCorporationMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.50%
Investment Interest Rate			10.85%
Investment, Acquisition Date			Nov. 23, 2021
Investment Maturity Date			Oct. 20, 2025
Investment Owned, Balance, Principal Amount			$ 480
Investment Owned, at Fair Value			$ 478
Investment, Identifier [Axis]: Mark Logic Corporation, Senior Secured Loans, Two, due 10/20/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:MarkLogicCorporationMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.50%
Investment Interest Rate			10.85%
Investment, Acquisition Date			Oct. 20, 2020
Investment Maturity Date			Oct. 20, 2025
Investment Owned, Balance, Principal Amount			$ 5,145
Investment Owned, at Fair Value			$ 5,121
Investment, Identifier [Axis]: MarkLogic Corporation, Equity Securities, Class A Units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:MarkLogicCorporationMember
Investment, Type [Extensible Enumeration]			Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]			High Tech Industries
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Acquisition Date			Oct. 20, 2020
Investment Owned, at Fair Value			$ 640
Investment, Identifier [Axis]: Matrix Parent, Inc, Senior Secured Loans, Due 3/1/2029
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:MatrixParentIncMember		mcip:MatrixParentIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.00%		5.00%
Investment Interest Rate	10.06%		9.55%
Investment, Acquisition Date	Nov. 02, 2022		Nov. 02, 2022
Investment Maturity Date	Mar. 01, 2029		Mar. 01, 2029
Investment Owned, Balance, Principal Amount	$ 2,487		$ 2,494
Investment Owned, at Fair Value	$ 1,982		$ 2,057
Investment, Identifier [Axis]: Medallia, Inc, Senior Secured Loans, due 10/27/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:MedalliaIncMember		mcip:MedalliaIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate			10.88%
Investment, Interest Rate, Paid in Kind	11.34%
Investment, Acquisition Date	Aug. 15, 2022		Aug. 15, 2022
Investment Maturity Date	Oct. 27, 2028		Oct. 27, 2028
Investment Owned, Balance, Principal Amount	$ 11,428		$ 11,270
Investment Owned, at Fair Value	$ 11,360		$ 11,225
Investment, Identifier [Axis]: Mindbody, Inc, Senior Secured Loans, One, Due 2/14/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:MindbodyIncMember		mcip:MindbodyIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment Interest Rate	12.10%		11.73%
Investment, Acquisition Date	Feb. 15, 2019		Feb. 15, 2019
Investment Maturity Date	Feb. 14, 2025		Feb. 14, 2025
Investment Owned, Balance, Principal Amount	$ 1,867		$ 1,867
Investment Owned, at Fair Value	$ 1,864		$ 1,865
Investment, Identifier [Axis]: Mindbody, Inc, Senior Secured Loans, Two, Due 2/14/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:MindbodyIncMember		mcip:MindbodyIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment Interest Rate	12.10%		11.73%
Investment, Acquisition Date	Sep. 22, 2021		Sep. 22, 2021
Investment Maturity Date	Feb. 14, 2025		Feb. 14, 2025
Investment Owned, Balance, Principal Amount	$ 7,387		$ 7,387
Investment Owned, at Fair Value	$ 7,372		$ 7,375
Investment, Identifier [Axis]: Mindbody, Inc. (Revolver), Senior Secured Loans, Due 2/14/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:MindbodyIncMember		mcip:MindbodyIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment Interest Rate	12.10%		11.73%
Investment, Acquisition Date	Feb. 15, 2019		Feb. 15, 2019
Investment Maturity Date	Feb. 14, 2025		Feb. 14, 2025
Investment Owned, Balance, Principal Amount	$ 190		$ 190
Investment, Identifier [Axis]: Money Lion, Inc. ( Delayed Draw), Junior Secured Loans, due 3/24/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:MoneyLionIncMember
Investment, Type [Extensible Enumeration]			Junior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Banking
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			Non-US [Member]
Investment, Basis Spread, Variable Rate			9.25%
Investment Interest Rate			14.07%
Investment, Acquisition Date			Mar. 25, 2022
Investment Maturity Date			Mar. 24, 2026
Investment Owned, Balance, Principal Amount			$ 5,357
Investment, Identifier [Axis]: Money Lion, Inc., Junior Secured Loans, due 3/24/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:MoneyLionIncMember
Investment, Type [Extensible Enumeration]			Junior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Banking
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			Non-US [Member]
Investment, Basis Spread, Variable Rate			9.25%
Investment Interest Rate			14.07%
Investment, Acquisition Date			Mar. 25, 2022
Investment Maturity Date			Mar. 24, 2026
Investment Owned, Balance, Principal Amount			$ 18,750
Investment Owned, at Fair Value			$ 18,445
Investment, Identifier [Axis]: Money Lion, Inc., Junior Secured Loans, due 5/1/2023
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:MoneyLionIncMember
Investment, Type [Extensible Enumeration]			Junior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Banking
Investment, Variable Interest Rate, Type [Extensible Enumeration]			us-gaap:PrimeRateMember
Investment, Issuer Geographic Region [Extensible Enumeration]			Non-US [Member]
Investment, Basis Spread, Variable Rate			5.75%
Investment Interest Rate			13.25%
Investment, Acquisition Date			Aug. 27, 2021
Investment Maturity Date			May 01, 2023
Investment Owned, Balance, Principal Amount			$ 2,500
Investment Owned, at Fair Value			$ 2,497
Investment, Identifier [Axis]: MoneyLion, Inc., Delayed Draw, Junior Secured Loans, Due 3/24/2026
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	mcip:MoneyLionIncMember
Investment, Type [Extensible Enumeration]	Junior Loans [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	Non-US [Member]
Investment, Basis Spread, Variable Rate	9.25%
Investment Interest Rate	14.26%
Investment, Acquisition Date	Mar. 25, 2022
Investment Maturity Date	Mar. 24, 2026
Investment Owned, Balance, Principal Amount	$ 5,357
Investment, Identifier [Axis]: MoneyLion, Inc., Junior Secured Loans, Due 3/24/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:MoneyLionIncMember
Investment, Type [Extensible Enumeration]	Junior Loans [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	Non-US [Member]
Investment, Basis Spread, Variable Rate	9.25%
Investment Interest Rate	14.26%
Investment, Acquisition Date	Mar. 25, 2022
Investment Maturity Date	Mar. 24, 2026
Investment Owned, Balance, Principal Amount	$ 18,750
Investment Owned, at Fair Value	$ 18,680
Investment, Identifier [Axis]: MoneyLion, Inc., Junior Secured Loans, Due 5/1/2023
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:MoneyLionIncMember
Investment, Type [Extensible Enumeration]	Junior Loans [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	us-gaap:PrimeRateMember
Investment, Issuer Geographic Region [Extensible Enumeration]	Non-US [Member]
Investment, Basis Spread, Variable Rate	5.75%
Investment Interest Rate	13.75%
Investment, Acquisition Date	Aug. 27, 2021
Investment Maturity Date	May 01, 2023
Investment Owned, Balance, Principal Amount	$ 2,500
Investment Owned, at Fair Value	$ 2,500
Investment, Identifier [Axis]: Moonraker Acquisitionco LLC (Delayed Draw), Senior Secured Loans, One, Due 8/4/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:MoonrakerAcquisitioncoLlcMember		mcip:MoonrakerAcquisitioncoLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.75%		6.00%
Investment Interest Rate	10.63%		10.32%
Investment, Acquisition Date	Sep. 30, 2022		Sep. 30, 2022
Investment Maturity Date	Aug. 04, 2028		Aug. 04, 2028
Investment Owned, Balance, Principal Amount	$ 2,333		$ 2,333
Investment, Identifier [Axis]: Moonraker Acquisitionco LLC (Delayed Draw), Senior Secured Loans, Two, Due 8/4/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:MoonrakerAcquisitioncoLlcMember		mcip:MoonrakerAcquisitioncoLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.75%		6.00%
Investment Interest Rate	10.63%		10.32%
Investment, Acquisition Date	Sep. 30, 2022		Sep. 30, 2022
Investment Maturity Date	Aug. 04, 2028		Aug. 04, 2028
Investment Owned, Balance, Principal Amount	$ 2,333		$ 2,333
Investment, Identifier [Axis]: Moonraker Acquisitionco LLC (Revolver), Senior Secured Loans, Due 8/4/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:MoonrakerAcquisitioncoLlcMember		mcip:MoonrakerAcquisitioncoLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.75%		6.00%
Investment Interest Rate	10.63%		10.32%
Investment, Acquisition Date	Sep. 30, 2022		Sep. 30, 2022
Investment Maturity Date	Aug. 04, 2028		Aug. 04, 2028
Investment Owned, Balance, Principal Amount	$ 933		$ 933
Investment, Identifier [Axis]: Moonraker Acquisitionco LLC, Senior Secured Loans, Due 8/4/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:MoonrakerAcquisitioncoLlcMember		mcip:MoonrakerAcquisitioncoLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.75%		6.00%
Investment Interest Rate	10.63%		10.32%
Investment, Acquisition Date	Sep. 30, 2022		Sep. 30, 2022
Investment Maturity Date	Aug. 04, 2028		Aug. 04, 2028
Investment Owned, Balance, Principal Amount	$ 6,983		$ 7,000
Investment Owned, at Fair Value	$ 6,983		$ 7,000
Investment, Identifier [Axis]: NCBP Property, LLC, Senior Secured Loans, Due 6/16/2023
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NCBPPropertyLLCMember		mcip:NCBPPropertyLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	FIRE Real Estate Sector [Member]		FIRE Real Estate Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	9.50%		9.50%
Investment Interest Rate	14.16%		13.62%
Investment, Acquisition Date	Dec. 18, 2020		Dec. 18, 2020
Investment Maturity Date	Jun. 16, 2023		Jun. 16, 2023
Investment Owned, Balance, Principal Amount	$ 2,500		$ 2,500
Investment Owned, at Fair Value	$ 2,511		$ 2,507
Investment, Identifier [Axis]: NQ PE Project Colosseum Midco Inc, Equity Securities, Common units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NqPeProjectColosseumMidcoIncMember		mcip:NqPeProjectColosseumMidcoIncMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Oct. 04, 2022		Oct. 04, 2022
Investment Owned, at Fair Value	$ 1,451		$ 1,365
Investment, Identifier [Axis]: NQ PE Project Colosseum Midco Inc, Senior Secured Loans, Due 10/4/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NqPeProjectColosseumMidcoInc.Member		mcip:NqPeProjectColosseumMidcoIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.65%		6.00%
Investment Interest Rate	10.46%		10.59%
Investment, Acquisition Date	Oct. 04, 2022		Oct. 04, 2022
Investment Maturity Date	Oct. 04, 2028		Oct. 04, 2028
Investment Owned, Balance, Principal Amount	$ 14,564		$ 14,600
Investment Owned, at Fair Value	$ 14,660		$ 14,308
Investment, Identifier [Axis]: NQ PE Project Colosseum Midco Inc. (Delayed Draw), Senior Secured Loans, Due 10/4/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NqPeProjectColosseumMidcoInc.Member		mcip:NqPeProjectColosseumMidcoIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.65%		6.00%
Investment Interest Rate	10.24%		10.59%
Investment, Acquisition Date	Oct. 04, 2022		Oct. 04, 2022
Investment Maturity Date	Oct. 04, 2028		Oct. 04, 2028
Investment Owned, Balance, Principal Amount	$ 3,244		$ 3,244
Investment, Identifier [Axis]: NQ PE Project Colosseum Midco Inc. (Revolver), Senior Secured Loans, Due 10/4/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NqPeProjectColosseumMidcoInc.Member		mcip:NqPeProjectColosseumMidcoIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.65%		6.00%
Investment Interest Rate	10.24%		10.59%
Investment, Acquisition Date	Oct. 04, 2022		Oct. 04, 2022
Investment Maturity Date	Oct. 04, 2028		Oct. 04, 2028
Investment Owned, Balance, Principal Amount	$ 1,825		$ 1,825
Investment, Identifier [Axis]: NTM Acquisition Corp, Senior Secured Loans, Due 6/7/2024
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NtmAcquisitionCorpMember		mcip:NtmAcquisitionCorpMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.25%		7.25%
Investment, Interest Rate, Paid in Kind	1.00%		1.00%
Investment, Acquisition Date	Apr. 18, 2019		Apr. 18, 2019
Investment Maturity Date	Jun. 07, 2024		Jun. 07, 2024
Investment Owned, Balance, Principal Amount	$ 4,341		$ 4,402
Investment Owned, at Fair Value	$ 4,168		4,270
Investment, Identifier [Axis]: Nastel Technologies, LLC
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Nastel Technologies, LLC [ Member]
Investment Owned, at Fair Value	$ 3,500		3,500
Investment, Identifier [Axis]: Nastel Technologies, LLC (3,408 Class A units)
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Nastel Technologies, LLC [ Member]
Investment Owned, at Fair Value	$ 4,115		$ 3,578
Investment, Identifier [Axis]: Nastel Technologies, LLC (Revolver)
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Nastel Technologies, LLC [ Member]
Investment, Identifier [Axis]: Nastel Technologies, LLC (Revolver), Senior Secured Loans, Two, Due 9/21/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Nastel Technologies, LLC [ Member]		Nastel Technologies, LLC [ Member]
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.28%		10.74%
Investment, Acquisition Date	Sep. 21, 2022		Sep. 21, 2022
Investment Maturity Date	Sep. 21, 2027		Sep. 21, 2028
Investment Owned, Balance, Principal Amount	$ 368		$ 368
Investment, Identifier [Axis]: Nastel Technologies, LLC, Equity Securities
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Nastel Technologies, LLC [ Member]		Nastel Technologies, LLC [ Member]
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Sep. 21, 2022		Sep. 21, 2022
Investment Owned, at Fair Value	$ 4,115		$ 3,578
Investment, Identifier [Axis]: Nastel Technologies, LLC, Senior Secured Loans, One, Due 9/21/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Nastel Technologies, LLC [ Member]		Nastel Technologies, LLC [ Member]
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.28%		10.74%
Investment, Acquisition Date	Sep. 21, 2022		Sep. 21, 2022
Investment Maturity Date	Sep. 21, 2027		Sep. 21, 2028
Investment Owned, Balance, Principal Amount	$ 3,500		$ 3,500
Investment Owned, at Fair Value	$ 3,500		$ 3,500
Investment, Identifier [Axis]: NationsBenefits, LLC (Delayed Draw), Senior Secured Loans, Due 8/26/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NationsBenefitsLLCMember		mcip:NationsBenefitsLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment Interest Rate	11.77%		11.22%
Investment, Acquisition Date	Aug. 26, 2022		Aug. 26, 2022
Investment Maturity Date	Aug. 26, 2027		Aug. 26, 2027
Investment Owned, Balance, Principal Amount	$ 15,578		$ 15,585
Investment Owned, at Fair Value	$ 8,350		$ 2,943
Investment, Identifier [Axis]: NationsBenefits, LLC (Revolver), Senior Secured Loans, Due 8/26/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NationsBenefitsLLCMember		mcip:NationsBenefitsLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment Interest Rate	11.77%		11.42%
Investment, Acquisition Date	Aug. 20, 2021		Aug. 20, 2021
Investment Maturity Date	Aug. 26, 2027		Aug. 26, 2027
Investment Owned, Balance, Principal Amount	$ 6,806		$ 6,806
Investment Owned, at Fair Value	$ 2,722		$ 2,722
Investment, Identifier [Axis]: NationsBenefits, LLC, Equity Securities, Common units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NationsBenefitsLLCMember		mcip:NationsBenefitsLLCMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Aug. 20, 2021		Aug. 20, 2021
Investment Owned, at Fair Value	$ 177		$ 201
Investment, Identifier [Axis]: NationsBenefits, LLC, Equity Securities, Series B units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NationsBenefitsLLCMember		mcip:NationsBenefitsLLCMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Interest Rate, Paid in Kind	5.00%		5.00%
Investment, Acquisition Date	Aug. 20, 2021		Aug. 20, 2021
Investment Owned, at Fair Value	$ 2,824		$ 2,861
Investment, Identifier [Axis]: NationsBenefits, LLC, Senior Secured Loans, One, Due 8/26/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NationsBenefitsLLCMember		mcip:NationsBenefitsLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment Interest Rate	11.77%		11.22%
Investment, Acquisition Date	Aug. 20, 2021		Aug. 20, 2021
Investment Maturity Date	Aug. 26, 2027		Aug. 26, 2027
Investment Owned, Balance, Principal Amount	$ 12,097		$ 12,128
Investment Owned, at Fair Value	$ 12,339		$ 12,370
Investment, Identifier [Axis]: NationsBenefits, LLC, Senior Secured Loans, Two, Due 8/26/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NationsBenefitsLLCMember		mcip:NationsBenefitsLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment Interest Rate	11.77%		11.22%
Investment, Acquisition Date	Aug. 26, 2022		Aug. 26, 2022
Investment Maturity Date	Aug. 26, 2027		Aug. 26, 2027
Investment Owned, Balance, Principal Amount	$ 14,415		$ 14,452
Investment Owned, at Fair Value	$ 14,704		$ 14,741
Investment, Identifier [Axis]: New Engen, Inc., , Unitranche Loans, Two, Due 12/3/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NewEngenInc.Member		mcip:NewEngenInc.Member
Investment, Type [Extensible Enumeration]	Unitranche Debt [Member]		Unitranche Debt [Member]
Investment, Industry Sector [Extensible Enumeration]			Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.00%		5.00%
Investment Interest Rate	9.67%		9.24%
Investment, Acquisition Date	Dec. 27, 2021		Dec. 27, 2021
Investment Maturity Date	Dec. 03, 2026		Dec. 03, 2026
Investment Owned, Balance, Principal Amount	$ 7,942		$ 7,962
Investment Owned, at Fair Value	$ 7,870		$ 7,877
Investment, Identifier [Axis]: New Engen, Inc., Equity Securites, Class B common units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NewEngenInc.Member		mcip:NewEngenInc.Member
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Dec. 27, 2021		Dec. 27, 2021
Investment Owned, at Fair Value			$ 5
Investment, Identifier [Axis]: New Engen, Inc., Equity Securites, Preferred units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NewEngenInc.Member		mcip:NewEngenInc.Member
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Interest Rate, Paid in Kind	8.00%		8.00%
Investment, Acquisition Date	Dec. 27, 2021		Dec. 27, 2021
Investment Owned, at Fair Value	$ 388		$ 391
Investment, Identifier [Axis]: New Engen, Inc., Unitranche Loans, One, Due 12/3/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NewEngenInc.Member		mcip:NewEngenInc.Member
Investment, Type [Extensible Enumeration]	Unitranche Debt [Member]		Unitranche Debt [Member]
Investment, Industry Sector [Extensible Enumeration]			Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.00%		5.00%
Investment Interest Rate	9.67%		9.24%
Investment, Acquisition Date	Dec. 03, 2021		Dec. 03, 2021
Investment Maturity Date	Dec. 03, 2026		Dec. 03, 2026
Investment Owned, Balance, Principal Amount	$ 9,405		$ 9,429
Investment Owned, at Fair Value	$ 9,319		$ 9,327
Investment, Identifier [Axis]: North Haven USHC Acquisition, Inc, Senior Secured Loans, Four, due 10/30/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NorthHavenUSHCAcquisitionIncMember		mcip:NorthHavenUSHCAcquisitionIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	11.01%		10.41%
Investment, Acquisition Date	Jul. 29, 2022		Jul. 29, 2022
Investment Maturity Date	Oct. 30, 2025		Oct. 30, 2025
Investment Owned, Balance, Principal Amount	$ 2,585		$ 2,592
Investment Owned, at Fair Value	$ 2,554		$ 2,575
Investment, Identifier [Axis]: North Haven USHC Acquisition, Inc, Senior Secured Loans, One, Due 10/30/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NorthHavenUSHCAcquisitionIncMember		mcip:NorthHavenUSHCAcquisitionIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.46%		11.18%
Investment, Acquisition Date	Oct. 30, 2020		Oct. 30, 2020
Investment Maturity Date	Oct. 30, 2025		Oct. 30, 2025
Investment Owned, Balance, Principal Amount	$ 2,444		$ 2,450
Investment Owned, at Fair Value	$ 2,427		$ 2,448
Investment, Identifier [Axis]: North Haven USHC Acquisition, Inc, Senior Secured Loans, Three, due 10/30/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NorthHavenUSHCAcquisitionIncMember		mcip:NorthHavenUSHCAcquisitionIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.46%		11.18%
Investment, Acquisition Date	Sep. 03, 2021		Sep. 03, 2021
Investment Maturity Date	Oct. 30, 2025		Oct. 30, 2025
Investment Owned, Balance, Principal Amount	$ 1,430		$ 1,434
Investment Owned, at Fair Value	$ 1,420		$ 1,433
Investment, Identifier [Axis]: North Haven USHC Acquisition, Inc, Senior Secured Loans, Two, Due 10/30/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NorthHavenUSHCAcquisitionIncMember		mcip:NorthHavenUSHCAcquisitionIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.46%		11.18%
Investment, Acquisition Date	Mar. 12, 2021		Mar. 12, 2021
Investment Maturity Date	Oct. 30, 2025		Oct. 30, 2025
Investment Owned, Balance, Principal Amount	$ 708		$ 710
Investment Owned, at Fair Value	$ 703		$ 709
Investment, Identifier [Axis]: North Haven USHC Acquisition, Inc. (Delayed Draw), Senior Secured Loans, Due 10/30/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NorthHavenUSHCAcquisitionIncMember		mcip:NorthHavenUSHCAcquisitionIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.46%		11.18%
Investment, Acquisition Date	Jul. 29, 2022		Jul. 29, 2022
Investment Maturity Date	Oct. 30, 2025		Oct. 30, 2025
Investment Owned, Balance, Principal Amount	$ 1,056		$ 1,056
Investment, Identifier [Axis]: North Haven USHC Acquisition, Inc. (Revolver), Senior Secured Loans, Due 10/30/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:NorthHavenUSHCAcquisitionIncMember		mcip:NorthHavenUSHCAcquisitionIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.27%		11.13%
Investment, Interest Rate, Paid in Cash	11.41%		10.98%
Investment, Acquisition Date	Oct. 30, 2020		Oct. 30, 2020
Investment Maturity Date	Oct. 30, 2025		Oct. 30, 2025
Investment Owned, Balance, Principal Amount	$ 416		$ 416
Investment Owned, at Fair Value	$ 187		$ 187
Investment, Identifier [Axis]: OIS Management Services, LLC (Delayed Draw), Senior Secured Loans, Due 11/16/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:OisManagementServicesLlcMember		mcip:OisManagementServicesLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.00%
Investment Interest Rate	11.00%		10.33%
Investment, Acquisition Date	Dec. 14, 2022		Dec. 14, 2022
Investment Maturity Date	Nov. 16, 2028		Nov. 16, 2028
Investment Owned, Balance, Principal Amount	$ 3,846		$ 3,846
Investment Owned, at Fair Value	$ 451
Investment, Identifier [Axis]: OIS Management Services, LLC (Revolver), Senior Secured Loans, Due 11/16/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:OisManagementServicesLlcMember		mcip:OisManagementServicesLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.00%
Investment Interest Rate	10.86%		10.33%
Investment, Acquisition Date	Dec. 14, 2022		Dec. 14, 2022
Investment Maturity Date	Nov. 16, 2028		Nov. 16, 2028
Investment Owned, Balance, Principal Amount	$ 1,154		$ 1,154
Investment Owned, at Fair Value	$ 77
Investment, Identifier [Axis]: OIS Management Services, LLC, Senior Secured Loans, Due 11/16/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:OisManagementServicesLlcMember		mcip:OisManagementServicesLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.00%
Investment Interest Rate	10.87%		10.33%
Investment, Acquisition Date	Dec. 14, 2022		Dec. 14, 2022
Investment Maturity Date	Nov. 16, 2028		Nov. 16, 2028
Investment Owned, Balance, Principal Amount	$ 10,000		$ 10,000
Investment Owned, at Fair Value	$ 10,013		$ 9,750
Investment, Identifier [Axis]: Oceana Australian Fixed Income Trust, Senior Secured Loans, Due 2/25/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:OceanaAustralianFixedIncomeTrustMember		mcip:OceanaAustralianFixedIncomeTrustMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:FireFinanceMember		mcip:FireFinanceMember
Investment, Issuer Geographic Region [Extensible Enumeration]	Non-US [Member]		country:US
Investment Interest Rate	11.50%		11.50%
Investment, Acquisition Date	Feb. 25, 2021		Feb. 25, 2021
Investment Maturity Date	Feb. 25, 2026		Feb. 25, 2026
Investment Owned, Balance, Principal Amount	$ 7,184		$ 7,321
Investment Owned, at Fair Value	$ 7,184		$ 7,321
Investment, Identifier [Axis]: Oceana Australian Fixed Income Trust, Senior Secured Loans, Due 6/29/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:OceanaAustralianFixedIncomeTrustMember		mcip:OceanaAustralianFixedIncomeTrustMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:FireFinanceMember		mcip:FireFinanceMember
Investment, Issuer Geographic Region [Extensible Enumeration]	Non-US [Member]		country:US
Investment Interest Rate	10.75%		10.75%
Investment, Acquisition Date	Jun. 29, 2021		Jun. 29, 2021
Investment Maturity Date	Jun. 29, 2026		Jun. 29, 2026
Investment Owned, Balance, Principal Amount	$ 3,026		$ 3,084
Investment Owned, at Fair Value	$ 3,026		$ 3,084
Investment, Identifier [Axis]: Onit, Inc., Unitranche Loans, Due 5/2/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:OnitInc.Member		mcip:OnitInc.Member
Investment, Type [Extensible Enumeration]	Unitranche Debt [Member]		Unitranche Debt [Member]
Investment, Industry Sector [Extensible Enumeration]			Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.25%		7.25%
Investment Interest Rate	12.30%		12.30%
Investment, Acquisition Date	Dec. 20, 2021		Dec. 20, 2021
Investment Maturity Date	May 02, 2025		May 02, 2025
Investment Owned, Balance, Principal Amount	$ 16,800		$ 16,800
Investment Owned, at Fair Value	$ 16,758		$ 16,632
Investment, Identifier [Axis]: Optomi, LLC (Revolver), Senior Secured Loans, Due 12/16/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:OptomiLlcMember		mcip:OptomiLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.50%		5.50%
Investment Interest Rate	10.23%		9.24%
Investment, Acquisition Date	Dec. 16, 2021		Dec. 16, 2021
Investment Maturity Date	Dec. 16, 2027		Dec. 16, 2027
Investment Owned, Balance, Principal Amount	$ 3,189		$ 3,189
Investment Owned, at Fair Value	$ 1,036		$ 1,030
Investment, Identifier [Axis]: Optomi, LLC, Equity Securities, Class A units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:OptomiLlcMember		mcip:OptomiLlcMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Dec. 16, 2021		Dec. 16, 2021
Investment Owned, at Fair Value	$ 554		$ 512
Investment, Identifier [Axis]: Optomi, LLC, Senior Secured Loans, One, Due 12/16/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:OptomiLlcMember		mcip:OptomiLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	8.25%		8.25%
Investment Interest Rate	12.94%		12.65%
Investment, Acquisition Date	Dec. 13, 2022		Dec. 13, 2022
Investment Maturity Date	Dec. 16, 2027		Dec. 16, 2027
Investment Owned, Balance, Principal Amount	$ 5,668		$ 5,668
Investment Owned, at Fair Value	$ 5,527		$ 5,668
Investment, Identifier [Axis]: Optomi, LLC, Senior Secured Loans, Two, Due 12/16/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:OptomiLlcMember		mcip:OptomiLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.50%		5.50%
Investment Interest Rate	10.23%		9.24%
Investment, Acquisition Date	Dec. 16, 2021		Dec. 16, 2021
Investment Maturity Date	Dec. 16, 2027		Dec. 16, 2027
Investment Owned, Balance, Principal Amount	$ 13,365		$ 13,399
Investment Owned, at Fair Value	$ 13,031		$ 12,980
Investment, Identifier [Axis]: Oranje Holdco, Inc, Senior Secured Loans, Due 2/1/2029
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:OranjeHoldcoIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	7.75%
Investment Interest Rate	12.43%
Investment, Acquisition Date	Feb. 01, 2023
Investment Maturity Date	Feb. 01, 2029
Investment Owned, Balance, Principal Amount	$ 14,000
Investment Owned, at Fair Value	$ 13,650
Investment, Identifier [Axis]: Oranje Holdco, Inc. (Revolver), Senior Secured Loans, Due 2/1/2029
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:OranjeHoldcoIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	7.75%
Investment Interest Rate	12.43%
Investment, Acquisition Date	Feb. 01, 2023
Investment Maturity Date	Feb. 01, 2029
Investment Owned, Balance, Principal Amount	$ 1,750
Investment, Identifier [Axis]: Pacific Bells, LLC, Senior Loans, Due 11/10/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:PacificBellsLlcMember		mcip:PacificBellsLlcMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Consumer		Services: Consumer
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	4.76%		4.50%
Investment Interest Rate	9.66%		9.34%
Investment, Acquisition Date	Nov. 02, 2022		Nov. 02, 2022
Investment Maturity Date	Nov. 10, 2028		Nov. 10, 2028
Investment Owned, Balance, Principal Amount	$ 2,931		$ 2,939
Investment Owned, at Fair Value	$ 2,824		$ 2,770
Investment, Identifier [Axis]: Panda Acquisition, LLC, Senior Secured Loans, due 10/18/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:PandaAcquisitionLlcMember		mcip:PandaAcquisitionLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Automotive		Automotive
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.35%
Investment Interest Rate	10.98%		10.28%
Investment, Acquisition Date	Dec. 20, 2022		Dec. 20, 2022
Investment Maturity Date	Oct. 18, 2028		Oct. 18, 2028
Investment Owned, Balance, Principal Amount	$ 9,938		$ 10,000
Investment Owned, at Fair Value	$ 8,198		$ 8,200
Investment, Identifier [Axis]: Par Petroleum, LLC, Senior Secured Loans, Due 1/12/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:ParPetroleumLlcMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Energy, Oil and Gas Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]			LIBOR
Investment, Basis Spread, Variable Rate			6.75%
Investment Interest Rate			10.58%
Investment, Acquisition Date			Jan. 27, 2020
Investment Maturity Date			Jan. 12, 2026
Investment Owned, Balance, Principal Amount			$ 855
Investment Owned, at Fair Value			$ 844
Investment, Identifier [Axis]: Patagonia Holdco LLC, Senior Loans, Due 8/1/2029
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:PatagoniaHoldcoLlcMember		mcip:PatagoniaHoldcoLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Telecommunications		Telecommunications
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	Non-US [Member]		Non-US [Member]
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	10.47%		9.96%
Investment, Acquisition Date	Aug. 05, 2022		Aug. 05, 2022
Investment Maturity Date	Aug. 01, 2029		Aug. 01, 2029
Investment Owned, Balance, Principal Amount	$ 14,925		$ 14,963
Investment Owned, at Fair Value	$ 12,440		$ 12,026
Investment, Identifier [Axis]: Polychem Acquisition, L L C, Senior Secured Loans, due 3/17/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:PolychemAcquisitionLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Containers, Packaging & Glass
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	5.00%
Investment Interest Rate	9.84%
Investment, Acquisition Date	Apr. 08, 2019
Investment Maturity Date	Mar. 17, 2025
Investment Owned, Balance, Principal Amount	$ 1,920
Investment Owned, at Fair Value	$ 1,920
Investment, Identifier [Axis]: Polychem Acquisition, LLC, Senior Secured Loans, Due 3/17/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:PolychemAcquisitionLLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Containers, Packaging & Glass
Investment, Variable Interest Rate, Type [Extensible Enumeration]			LIBOR
Investment, Basis Spread, Variable Rate			5.00%
Investment Interest Rate			9.38%
Investment, Acquisition Date			Apr. 08, 2019
Investment Maturity Date			Mar. 17, 2025
Investment Owned, Balance, Principal Amount			$ 1,925
Investment Owned, at Fair Value			$ 1,925
Investment, Identifier [Axis]: Premier Roofing L.L.C, Senior Secured Loans, Due 8/29/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:PremierRoofingLlcMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Construction & Building
Investment, Variable Interest Rate, Type [Extensible Enumeration]			LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			8.50%
Investment, Interest Rate, Paid in Cash			12.23%
Investment, Interest Rate, Paid in Kind			1.00%
Investment, Acquisition Date			Aug. 31, 2020
Investment Maturity Date			Aug. 29, 2025
Investment Owned, Balance, Principal Amount			$ 3,450
Investment Owned, at Fair Value			$ 3,392
Investment, Identifier [Axis]: Premier Roofing L.L.C. (Revolver), Senior Secured Loans, due 8/29/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:PremierRoofingLlcMember		mcip:PremierRoofingLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Construction & Building		Construction & Building
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	8.50%		8.50%
Investment, Interest Rate, Paid in Cash	12.45%		12.23%
Investment, Interest Rate, Paid in Kind	1.00%		1.00%
Investment, Acquisition Date	Aug. 31, 2020		Aug. 31, 2020
Investment Maturity Date	Aug. 29, 2025		Aug. 29, 2025
Investment Owned, Balance, Principal Amount	$ 1,207		$ 1,204
Investment Owned, at Fair Value	$ 952		$ 948
Investment, Identifier [Axis]: Premier Roofing L.L.C., Senior Secured Loans, due 8/29/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:PremierRoofingLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Construction & Building
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	8.50%
Investment, Interest Rate, Paid in Kind	1.00%
Investment, Acquisition Date	Aug. 31, 2020
Investment Maturity Date	Aug. 29, 2025
Investment Owned, Balance, Principal Amount	$ 3,450
Investment Owned, at Fair Value	$ 3,398
Investment, Identifier [Axis]: Prototek LLC (Delayed Draw), Senior Secured Loans, Due 12/8/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:PrototekLlcMember		mcip:PrototekLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.27%		10.83%
Investment, Acquisition Date	Dec. 08, 2022		Dec. 08, 2022
Investment Maturity Date	Dec. 08, 2027		Dec. 08, 2027
Investment Owned, Balance, Principal Amount	$ 2,457		$ 2,457
Investment, Identifier [Axis]: Prototek LLC (Revolver), Senior Secured Loans, Due 12/8/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:PrototekLlcMember		mcip:PrototekLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.22%		10.83%
Investment, Acquisition Date	Dec. 08, 2022		Dec. 08, 2022
Investment Maturity Date	Dec. 08, 2027		Dec. 08, 2027
Investment Owned, Balance, Principal Amount	$ 1,843		$ 1,843
Investment, Identifier [Axis]: Prototek LLC, Senior Secured Loans, Due 12/8/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:PrototekLlcMember		mcip:PrototekLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.27%		10.83%
Investment, Acquisition Date	Dec. 08, 2022		Dec. 08, 2022
Investment Maturity Date	Dec. 08, 2027		Dec. 08, 2027
Investment Owned, Balance, Principal Amount	$ 8,000		$ 8,000
Investment Owned, at Fair Value	$ 7,984		$ 7,760
Investment, Identifier [Axis]: QF Holdings, Inc, Senior Secured Loans, (Delayed Draw), Due 12/15/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:QfHoldingsIncMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]			LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.25%
Investment Interest Rate			10.64%
Investment, Acquisition Date			Aug. 21, 2020
Investment Maturity Date			Dec. 15, 2027
Investment Owned, Balance, Principal Amount			$ 910
Investment Owned, at Fair Value			$ 692
Investment, Identifier [Axis]: QF Holdings, Inc, Senior Secured Loans, Four, Due 12/15/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:QfHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	6.35%
Investment Interest Rate	11.16%
Investment, Acquisition Date	Aug. 21, 2020
Investment Maturity Date	Dec. 15, 2027
Investment Owned, Balance, Principal Amount	$ 910
Investment Owned, at Fair Value	$ 910
Investment, Identifier [Axis]: QF Holdings, Inc, Senior Secured Loans, One, Due 12/15/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:QfHoldingsIncMember		mcip:QfHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.35%		6.25%
Investment Interest Rate	11.16%		10.98%
Investment, Acquisition Date	Sep. 19, 2019		Sep. 19, 2019
Investment Maturity Date	Dec. 15, 2027		Dec. 15, 2027
Investment Owned, Balance, Principal Amount	$ 4,550		$ 4,550
Investment Owned, at Fair Value	$ 4,550		$ 4,555
Investment, Identifier [Axis]: QF Holdings, Inc, Senior Secured Loans, Three, Due 12/15/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:QfHoldingsIncMember		mcip:QfHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.35%		6.25%
Investment Interest Rate	11.16%		10.98%
Investment, Acquisition Date	Sep. 19, 2019		Sep. 19, 2019
Investment Maturity Date	Dec. 15, 2027		Dec. 15, 2027
Investment Owned, Balance, Principal Amount	$ 910		$ 910
Investment Owned, at Fair Value	$ 910		$ 911
Investment, Identifier [Axis]: QF Holdings, Inc, Senior Secured Loans, Two, Due 12/15/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:QfHoldingsIncMember		mcip:QfHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.35%		6.25%
Investment Interest Rate	11.16%		11.02%
Investment, Acquisition Date	Dec. 15, 2021		Dec. 15, 2021
Investment Maturity Date	Dec. 15, 2027		Dec. 15, 2027
Investment Owned, Balance, Principal Amount	$ 4,368		$ 4,368
Investment Owned, at Fair Value	$ 4,368		$ 4,372
Investment, Identifier [Axis]: QF Holdings, Inc. (Revolver), Senior Secured Loans, Due 12/15/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:QfHoldingsIncMember		mcip:QfHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.35%		6.25%
Investment Interest Rate	11.06%		10.98%
Investment, Acquisition Date	Sep. 19, 2019		Sep. 19, 2019
Investment Maturity Date	Dec. 15, 2027		Dec. 15, 2027
Investment Owned, Balance, Principal Amount	$ 1,092		$ 1,092
Investment Owned, at Fair Value	$ 182
Investment, Identifier [Axis]: QuarterNorth Energy Inc., Equity Securities, Common stock
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:QuarternorthEnergyIncMember		mcip:QuarternorthEnergyIncMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Energy, Oil and Gas Sector [Member]		Energy, Oil and Gas Sector [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Jan. 11, 2020		Jan. 11, 2020
Investment Owned, at Fair Value	$ 608		$ 606
Investment, Identifier [Axis]: Quest Resource Management Group LLC Senior Secured Loans Four Due 10 20 2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:QuestResourceManagementGroupLLCMember		mcip:QuestResourceManagementGroupLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Environmental Industries		Environmental Industries
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		6.50%
Investment Interest Rate	11.78%		10.62%
Investment, Acquisition Date	Dec. 07, 2021		Dec. 07, 2021
Investment Maturity Date	Oct. 20, 2025		Oct. 20, 2025
Investment Owned, Balance, Principal Amount	$ 382		$ 1,772
Investment Owned, at Fair Value	$ 370		$ 381
Investment, Identifier [Axis]: Quest Resource Management Group, L L C, Senior Secured Loans, One, due 10/20/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:QuestResourceManagementGroupLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Environmental Industries
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	7.00%
Investment Interest Rate	11.67%
Investment, Acquisition Date	Oct. 19, 2020
Investment Maturity Date	Oct. 20, 2025
Investment Owned, Balance, Principal Amount	$ 970
Investment Owned, at Fair Value	$ 944
Investment, Identifier [Axis]: Quest Resource Management Group, L L C, Senior Secured Loans, Three, due 10/20/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:QuestResourceManagementGroupLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Environmental Industries
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	7.00%
Investment Interest Rate	11.78%
Investment, Acquisition Date	Jul. 12, 2021
Investment Maturity Date	Oct. 20, 2025
Investment Owned, Balance, Principal Amount	$ 3,787
Investment Owned, at Fair Value	$ 3,673
Investment, Identifier [Axis]: Quest Resource Management Group, L L C, Senior Secured Loans, Two, due 10/20/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:QuestResourceManagementGroupLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Environmental Industries
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	7.00%
Investment Interest Rate	11.78%
Investment, Acquisition Date	Oct. 19, 2020
Investment Maturity Date	Oct. 20, 2025
Investment Owned, Balance, Principal Amount	$ 1,065
Investment Owned, at Fair Value	$ 1,036
Investment, Identifier [Axis]: Quest Resource Management Group, LLC, Equity Securities, One, Warrants
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:QuestResourceManagementGroupLLCMember		mcip:QuestResourceManagementGroupLLCMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Environmental Industries		Environmental Industries
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Oct. 19, 2020		Oct. 19, 2020
Investment Maturity Date	Mar. 19, 2028		Mar. 19, 2028
Investment Owned, at Fair Value	$ 210		$ 210
Investment, Identifier [Axis]: Quest Resource Management Group, LLC, Equity Securities, Two, Warrants
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:QuestResourceManagementGroupLLCMember		mcip:QuestResourceManagementGroupLLCMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Environmental Industries		Environmental Industries
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Oct. 19, 2021		Oct. 19, 2021
Investment Maturity Date	Mar. 19, 2028		Mar. 19, 2028
Investment Owned, at Fair Value	$ 147		$ 147
Investment, Identifier [Axis]: Quest Resource Management Group, LLC, Senior Secured Loans, One, Due 10/20/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:QuestResourceManagementGroupLLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Environmental Industries
Investment, Variable Interest Rate, Type [Extensible Enumeration]			LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.50%
Investment Interest Rate			10.62%
Investment, Acquisition Date			Oct. 19, 2020
Investment Maturity Date			Oct. 20, 2025
Investment Owned, Balance, Principal Amount			$ 972
Investment Owned, at Fair Value			$ 972
Investment, Identifier [Axis]: Quest Resource Management Group, LLC, Senior Secured Loans, Three, Due 10/20/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:QuestResourceManagementGroupLLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Environmental Industries
Investment, Variable Interest Rate, Type [Extensible Enumeration]			LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.50%
Investment Interest Rate			10.62%
Investment, Acquisition Date			Dec. 07, 2021
Investment Maturity Date			Oct. 20, 2025
Investment Owned, Balance, Principal Amount			$ 3,796
Investment Owned, at Fair Value			$ 3,781
Investment, Identifier [Axis]: Quest Resource Management Group, LLC, Senior Secured Loans, Two, Due 10/20/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:QuestResourceManagementGroupLLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Environmental Industries
Investment, Variable Interest Rate, Type [Extensible Enumeration]			LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.50%
Investment Interest Rate			10.62%
Investment, Acquisition Date			Oct. 19, 2020
Investment Maturity Date			Oct. 20, 2025
Investment Owned, Balance, Principal Amount			$ 1,068
Investment Owned, at Fair Value			$ 1,067
Investment, Identifier [Axis]: RS Acquisition, LLC, Delayed Draw, Senior Loans, Due 12/14/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:RsAcquisitionLlcMember		mcip:RsAcquisitionLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Transportation Sector [Member]		Transportation Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.00%
Investment Interest Rate	10.66%		10.12%
Investment, Acquisition Date	Dec. 13, 2021		Dec. 13, 2021
Investment Maturity Date	Dec. 14, 2026		Dec. 14, 2026
Investment Owned, Balance, Principal Amount	$ 10,052		$ 10,073
Investment Owned, at Fair Value	$ 8,100		$ 8,087
Investment, Identifier [Axis]: RS Acquisition, LLC, Equity Securites, Common units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:RsAcquisitionLlcMember		mcip:RsAcquisitionLlcMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Transportation Sector [Member]		Transportation Sector [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Jan. 12, 2022		Jan. 12, 2022
Investment Owned, at Fair Value	$ 1,162		$ 1,053
Investment, Identifier [Axis]: RS Acquisition, LLC, Revolver, Senior Loans, Due 12/14/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:RsAcquisitionLlcMember		mcip:RsAcquisitionLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Transportation Sector [Member]		Transportation Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.00%
Investment Interest Rate	10.66%		10.12%
Investment, Acquisition Date	Dec. 13, 2021		Dec. 13, 2021
Investment Maturity Date	Dec. 14, 2026		Dec. 14, 2026
Investment Owned, Balance, Principal Amount	$ 1,264		$ 1,264
Investment Owned, at Fair Value	$ 1,237		$ 887
Investment, Identifier [Axis]: RS Acquisition, LLC, Senior Loans, Due 12/14/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:RsAcquisitionLlcMember		mcip:RsAcquisitionLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Transportation Sector [Member]		Transportation Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.00%
Investment Interest Rate	10.66%		10.12%
Investment, Acquisition Date	Dec. 13, 2021		Dec. 13, 2021
Investment Maturity Date	Dec. 14, 2026		Dec. 14, 2026
Investment Owned, Balance, Principal Amount	$ 10,890		$ 10,918
Investment Owned, at Fair Value	$ 10,650		$ 10,634
Investment, Identifier [Axis]: Randys Holdings, Inc., Delayed Draw, Senior Loans, Due 11/1/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:RandysHoldingsInc.Member		mcip:RandysHoldingsInc.Member
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Transportation Sector [Member]		Transportation Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.40%		10.59%
Investment, Acquisition Date	Nov. 01, 2022		Nov. 01, 2022
Investment Maturity Date	Nov. 01, 2028		Nov. 01, 2028
Investment Owned, Balance, Principal Amount	$ 5,682		$ 5,682
Investment, Identifier [Axis]: Randys Holdings, Inc., Revolver, Senior Loans, Due 11/1/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:RandysHoldingsInc.Member		mcip:RandysHoldingsInc.Member
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Transportation Sector [Member]		Transportation Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.40%		10.59%
Investment, Acquisition Date	Nov. 01, 2022		Nov. 01, 2022
Investment Maturity Date	Nov. 01, 2028		Nov. 01, 2028
Investment Owned, Balance, Principal Amount	$ 2,273		$ 2,273
Investment Owned, at Fair Value	$ 427		$ 347
Investment, Identifier [Axis]: Randys Holdings, Inc., Senior Loans, Due 11/1/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:RandysHoldingsInc.Member		mcip:RandysHoldingsInc.Member
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Transportation Sector [Member]		Transportation Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.40%		10.59%
Investment, Acquisition Date	Nov. 01, 2022		Nov. 01, 2022
Investment Maturity Date	Nov. 01, 2028		Nov. 01, 2028
Investment Owned, Balance, Principal Amount	$ 17,003		$ 17,045
Investment Owned, at Fair Value	$ 16,926		$ 16,534
Investment, Identifier [Axis]: Really Great Reading Company, Inc, Senior Secured Loans, Due 12/8/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ReallyGreatReadingCompanyIncMember		mcip:ReallyGreatReadingCompanyIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.00%
Investment Interest Rate	10.89%		10.83%
Investment, Acquisition Date	Dec. 09, 2022		Dec. 09, 2022
Investment Maturity Date	Dec. 08, 2028		Dec. 08, 2028
Investment Owned, Balance, Principal Amount	$ 12,000		$ 12,000
Investment Owned, at Fair Value	$ 12,060		$ 11,700
Investment, Identifier [Axis]: Really Great Reading Company, Inc. (Delayed Draw), Senior Secured Loans, Due 12/8/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ReallyGreatReadingCompanyIncMember		mcip:ReallyGreatReadingCompanyIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.00%
Investment Interest Rate	10.89%		10.83%
Investment, Acquisition Date	Dec. 09, 2022		Dec. 09, 2022
Investment Maturity Date	Dec. 08, 2028		Dec. 08, 2028
Investment Owned, Balance, Principal Amount	$ 2,526		$ 2,526
Investment, Identifier [Axis]: Really Great Reading Company, Inc. (Revolver), Senior Secured Loans, Due 12/8/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ReallyGreatReadingCompanyIncMember		mcip:ReallyGreatReadingCompanyIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.00%
Investment Interest Rate	10.89%		10.83%
Investment, Acquisition Date	Dec. 09, 2022		Dec. 09, 2022
Investment Maturity Date	Dec. 08, 2028		Dec. 08, 2028
Investment Owned, Balance, Principal Amount	$ 3,200		$ 3,200
Investment, Identifier [Axis]: Really Great Reading Company, Inc., Equity Securites, Series A units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ReallyGreatReadingCompanyIncMember		mcip:ReallyGreatReadingCompanyIncMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Dec. 09, 2022		Dec. 09, 2022
Investment Owned, at Fair Value	$ 386		$ 369
Investment, Identifier [Axis]: Recorded Future, Inc., Equity Securities, Class A units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Recorded Future, Inc [ Member]		Recorded Future, Inc [ Member]
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Jul. 03, 2019		Jul. 03, 2019
Investment Owned, at Fair Value	$ 126		$ 113
Investment, Identifier [Axis]: Recycled Plastics Industries, L L C ( Revolver), Senior Secured Loans, due 8/4/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:RecycledPlasticsIndustriesLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Consumer Goods: Durable
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	6.75%
Investment Interest Rate	11.58%
Investment, Acquisition Date	Aug. 04, 2021
Investment Maturity Date	Aug. 04, 2026
Investment Owned, Balance, Principal Amount	$ 743
Investment Owned, at Fair Value	$ 288
Investment, Identifier [Axis]: Recycled Plastics Industries, L L C, Senior Secured Loans, due 8/4/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:RecycledPlasticsIndustriesLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Consumer Goods: Durable
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	6.75%
Investment Interest Rate	11.41%
Investment, Acquisition Date	Aug. 04, 2021
Investment Maturity Date	Aug. 04, 2026
Investment Owned, Balance, Principal Amount	$ 5,418
Investment Owned, at Fair Value	$ 5,255
Investment, Identifier [Axis]: Recycled Plastics Industries, LLC (Revolver), Senior Secured Loans, Due 8/4/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:RecycledPlasticsIndustriesLLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Consumer Goods: Durable
Investment, Variable Interest Rate, Type [Extensible Enumeration]			LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.75%
Investment Interest Rate			10.87%
Investment, Acquisition Date			Aug. 04, 2021
Investment Maturity Date			Aug. 04, 2026
Investment Owned, Balance, Principal Amount			$ 743
Investment, Identifier [Axis]: Recycled Plastics Industries, LLC, Senior Secured Loans, Due 8/4/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:RecycledPlasticsIndustriesLLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Consumer Goods: Durable
Investment, Variable Interest Rate, Type [Extensible Enumeration]			LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.75%
Investment Interest Rate			10.87%
Investment, Acquisition Date			Aug. 04, 2021
Investment Maturity Date			Aug. 04, 2026
Investment Owned, Balance, Principal Amount			$ 5,431
Investment Owned, at Fair Value			$ 5,295
Investment, Identifier [Axis]: Relativity ODA LLC (Revolver), Senior Secured Loans, Due 5/12/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:RelativityODALLCMember		mcip:RelativityODALLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.50%		7.50%
Investment, Interest Rate, Paid in Kind	12.35%		11.89%
Investment, Acquisition Date	May 12, 2021		May 12, 2021
Investment Maturity Date	May 12, 2027		May 12, 2027
Investment Owned, Balance, Principal Amount	$ 450		$ 450
Investment, Identifier [Axis]: Relativity ODA LLC, Senior Secured Loans, Due 5/12/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:RelativityODALLCMember		mcip:RelativityODALLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.50%		7.50%
Investment, Interest Rate, Paid in Kind	12.35%		11.89%
Investment, Acquisition Date	May 12, 2021		May 12, 2021
Investment Maturity Date	May 12, 2027		May 12, 2027
Investment Owned, Balance, Principal Amount	$ 5,207		$ 5,154
Investment Owned, at Fair Value	$ 5,213		$ 5,151
Investment, Identifier [Axis]: Relevate Health Group, L L C ( Delayed Draw), Senior Secured Loans, due, 11/20/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:RelevateHealthGroupLLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			5.75%
Investment Interest Rate			9.97%
Investment, Acquisition Date			Nov. 20, 2020
Investment Maturity Date			Nov. 20, 2025
Investment Owned, Balance, Principal Amount			$ 1,037
Investment Owned, at Fair Value			$ 865
Investment, Identifier [Axis]: Relevate Health Group, LLC (Revolver), Senior Secured Loans, Due 11/20/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:RelevateHealthGroupLLCMember		mcip:RelevateHealthGroupLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		5.75%
Investment Interest Rate	10.77%		9.97%
Investment, Acquisition Date	Nov. 20, 2020		Nov. 20, 2020
Investment Maturity Date	Nov. 20, 2025		Nov. 20, 2025
Investment Owned, Balance, Principal Amount	$ 789		$ 789
Investment, Identifier [Axis]: Relevate Health Group, LLC, Equity Securites, Class B common units)
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:RelevateHealthGroupLLCMember		mcip:RelevateHealthGroupLLCMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Nov. 20, 2020		Nov. 20, 2020
Investment, Identifier [Axis]: Relevate Health Group, LLC, Equity Securites, Preferred units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:RelevateHealthGroupLLCMember		mcip:RelevateHealthGroupLLCMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Interest Rate, Paid in Kind	12.00%		12.00%
Investment, Acquisition Date	Nov. 20, 2020		Nov. 20, 2020
Investment Owned, at Fair Value	$ 77		$ 86
Investment, Identifier [Axis]: Relevate Health Group, LLC, Senior Secured Loans, One, Due 11/20/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:RelevateHealthGroupLLCMember		mcip:RelevateHealthGroupLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		5.75%
Investment Interest Rate	10.77%		9.97%
Investment, Acquisition Date	Nov. 20, 2020		Nov. 20, 2020
Investment Maturity Date	Nov. 20, 2025		Nov. 20, 2025
Investment Owned, Balance, Principal Amount	$ 1,960		$ 1,965
Investment Owned, at Fair Value	$ 1,935		$ 1,933
Investment, Identifier [Axis]: Relevate Health Group, LLC, Senior Secured Loans, Three, Due 11/20/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:RelevateHealthGroupLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	6.00%
Investment Interest Rate	10.77%
Investment, Acquisition Date	Nov. 20, 2020
Investment Maturity Date	Nov. 20, 2025
Investment Owned, Balance, Principal Amount	$ 877
Investment Owned, at Fair Value	$ 865
Investment, Identifier [Axis]: Relevate Health Group, LLC, Senior Secured Loans, Two, Due 11/20/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:RelevateHealthGroupLLCMember		mcip:RelevateHealthGroupLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		5.75%
Investment Interest Rate	10.77%		9.97%
Investment, Acquisition Date	Mar. 28, 2022		Mar. 28, 2022
Investment Maturity Date	Nov. 20, 2025		Nov. 20, 2025
Investment Owned, Balance, Principal Amount	$ 5,224		$ 5,237
Investment Owned, at Fair Value	$ 5,156		$ 5,150
Investment, Identifier [Axis]: Renaissance Learning, Inc, Senior Secured Loans, Due 4/5/2030
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:RenaissanceLearningIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	4.75%
Investment Interest Rate	9.55%
Investment, Acquisition Date	Mar. 16, 2023
Investment Maturity Date	Apr. 05, 2030
Investment Owned, Balance, Principal Amount	$ 7,500
Investment Owned, at Fair Value	$ 7,275
Investment, Identifier [Axis]: Research Now Group, Inc. and Survey Sampling International, LLC, Senior Secured Loans, Due 12/20/2024
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ResearchNowGroupInc.andSurveySamplingInternationalLLCMember		mcip:ResearchNowGroupInc.andSurveySamplingInternationalLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Diversified & Production		Media: Diversified & Production
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.50%		5.50%
Investment Interest Rate	10.31%		9.89%
Investment, Acquisition Date	Nov. 28, 2022		Nov. 28, 2022
Investment Maturity Date	Dec. 20, 2024		Dec. 20, 2024
Investment Owned, Balance, Principal Amount	$ 2,487		$ 2,493
Investment Owned, at Fair Value	$ 1,907		$ 1,888
Investment, Identifier [Axis]: S&S Holdings LLC, Senior Loans, Due 3/10/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SSHoldingsLlcMember		mcip:SAndSHoldingsLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Wholesale
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.00%		5.00%
Investment Interest Rate	9.83%		9.29%
Investment, Acquisition Date	Mar. 10, 2021		Mar. 10, 2021
Investment Maturity Date	Mar. 10, 2028		Mar. 10, 2028
Investment Owned, Balance, Principal Amount	$ 2,940		$ 2,947
Investment Owned, at Fair Value	$ 2,780		$ 2,695
Investment, Identifier [Axis]: SCP Eye Care Holdco, LLC (Delayed Draw), Senior Secured Loans, Due 10/5/2029
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ScpEyeCareHoldcoLlcMember		mcip:ScpEyeCareHoldcoLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	10.41%		9.46%
Investment, Acquisition Date	Oct. 07, 2022		Oct. 07, 2022
Investment Maturity Date	Oct. 05, 2029		Oct. 05, 2029
Investment Owned, Balance, Principal Amount	$ 8,053		$ 8,053
Investment, Identifier [Axis]: SCP Eye Care Holdco, LLC (Revolver), Senior Secured Loans, Due 10/5/2029
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ScpEyeCareHoldcoLlcMember		mcip:ScpEyeCareHoldcoLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	10.61%		10.18%
Investment, Acquisition Date	Oct. 07, 2022		Oct. 07, 2022
Investment Maturity Date	Oct. 05, 2029		Oct. 05, 2029
Investment Owned, Balance, Principal Amount	$ 1,442		$ 1,442
Investment Owned, at Fair Value	$ 513		$ 117
Investment, Identifier [Axis]: SCP Eye Care Holdco, LLC, Senior Secured Loans, Due 10/5/2029
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ScpEyeCareHoldcoLlcMember		mcip:ScpEyeCareHoldcoLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	10.41%		9.46%
Investment, Acquisition Date	Oct. 07, 2022		Oct. 07, 2022
Investment Maturity Date	Oct. 05, 2029		Oct. 05, 2029
Investment Owned, Balance, Principal Amount	$ 9,232		$ 9,255
Investment Owned, at Fair Value	$ 8,862		$ 8,977
Investment, Identifier [Axis]: SCP Intermediate Holdings, LLC, Senior Secured Loans, Due 12/28/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ScpIntermediateHoldingsLlcMember		mcip:ScpIntermediateHoldingsLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:FireFinanceMember		mcip:FireFinanceMember
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	10.80%		10.17%
Investment, Acquisition Date	Dec. 28, 2022		Dec. 28, 2022
Investment Maturity Date	Dec. 28, 2028		Dec. 28, 2028
Investment Owned, Balance, Principal Amount	$ 2,993		$ 3,000
Investment Owned, at Fair Value	$ 2,968		$ 2,925
Investment, Identifier [Axis]: SFR Holdco, LLC (10.5% of equity commitments), (LLC interest)
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]		Non-controlled affiliate company investments	Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	S F R Holdco, L L C [ Member]	S F R Holdco, L L C [ Member]	S F R Holdco, L L C [ Member]
Investment, Type [Extensible Enumeration]			Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]			FIRE Real Estate Sector [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Acquisition Date			Mar. 01, 2022
Investment Owned, at Fair Value	$ 2,386	$ 131	$ 1,545
Investment, Identifier [Axis]: SFR Holdco, LLC (13.9% of equity commitments), (LLC interest)
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]		Non-controlled affiliate company investments	Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	S F R Holdco, L L C [ Member]	S F R Holdco, L L C [ Member]	S F R Holdco, L L C [ Member]
Investment, Type [Extensible Enumeration]			Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]			FIRE Real Estate Sector [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Acquisition Date			Aug. 06, 2021
Investment Owned, at Fair Value	$ 3,900	$ 3,900	$ 3,900	$ 3,900
Investment, Identifier [Axis]: SFR Holdco, LLC (Delayed Draw), Junior Secured Loans, Due 7/28/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	S F R Holdco, L L C [ Member]		S F R Holdco, L L C [ Member]
Investment, Type [Extensible Enumeration]	Junior Loans [Member]		Junior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	FIRE: Real Estate		FIRE Real Estate Sector [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment Interest Rate	8.00%		8.00%
Investment, Acquisition Date	Mar. 01, 2022		Mar. 01, 2022
Investment Maturity Date	Jul. 28, 2028		Jul. 28, 2028
Investment Owned, Balance, Principal Amount	$ 4,388		$ 4,388
Investment Owned, at Fair Value	$ 3,577		2,316
Investment, Identifier [Axis]: SFR Holdco, LLC (Delayed draw junior secured loan)
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments	Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	S F R Holdco, L L C [ Member]	S F R Holdco, L L C [ Member]
Investment Owned, at Fair Value	$ 3,577	$ 196	2,316
Investment, Identifier [Axis]: SFR Holdco, LLC, Equity Securities, Two, due 7/28/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	S F R Holdco, L L C [ Member]
Investment, Type [Extensible Enumeration]	Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	FIRE: Real Estate
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Acquisition Date	Mar. 01, 2022
Investment Maturity Date	Jul. 28, 2028
Investment Owned, at Fair Value	$ 2,386
Investment, Identifier [Axis]: SFR Holdco, LLC, Equity Securities, due 7/28/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	S F R Holdco, L L C [ Member]
Investment, Type [Extensible Enumeration]	Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	FIRE: Real Estate
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Acquisition Date	Aug. 06, 2021
Investment Maturity Date	Jul. 28, 2028
Investment Owned, at Fair Value	$ 3,900
Investment, Identifier [Axis]: SFR Holdco, LLC, Junior Secured Loan, One
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments	Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	S F R Holdco, L L C [ Member]	S F R Holdco, L L C [ Member]
Investment Owned, at Fair Value	$ 5,850	$ 5,850	$ 5,850	5,850
Investment, Identifier [Axis]: SFR Holdco, LLC, Junior Secured Loans, Due 7/28/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	S F R Holdco, L L C [ Member]		S F R Holdco, L L C [ Member]
Investment, Type [Extensible Enumeration]	Junior Loans [Member]		Junior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	FIRE: Real Estate		FIRE Real Estate Sector [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment Interest Rate	8.00%		8.00%
Investment, Acquisition Date	Aug. 06, 2021		Aug. 06, 2021
Investment Maturity Date	Jul. 28, 2028		Jul. 28, 2028
Investment Owned, Balance, Principal Amount	$ 5,850		$ 5,850
Investment Owned, at Fair Value	$ 5,850		$ 5,850
Investment, Identifier [Axis]: SI Holdings, Inc. (Integrated Polymer Solutions) (Revolver), Senior Secured Loans, Due 7/25/2024
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:ApiHoldingsIiiCorpMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Aerospace & Defense
Investment, Variable Interest Rate, Type [Extensible Enumeration]			LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.00%
Investment Interest Rate			10.38%
Investment, Acquisition Date			Jul. 25, 2019
Investment Maturity Date			Jul. 25, 2024
Investment Owned, Balance, Principal Amount			$ 316
Investment Owned, at Fair Value			$ 71
Investment, Identifier [Axis]: SI Holdings, Inc. (Integrated Polymer Solutions) (Revolver), Senior Secured Loans, Due 7/25/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SHIHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Aerospace & Defense
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	6.00%
Investment Interest Rate	10.96%
Investment, Acquisition Date	Jul. 25, 2019
Investment Maturity Date	Jul. 25, 2025
Investment Owned, Balance, Principal Amount	$ 316
Investment Owned, at Fair Value	$ 131
Investment, Identifier [Axis]: SI Holdings, Inc. (Integrated Polymer Solutions), Senior Secured Loans, Five, Due 7/25/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SHIHoldingsIncMember		mcip:ApiHoldingsIiiCorpMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Aerospace & Defense		Aerospace & Defense
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.00%
Investment Interest Rate	10.96%		10.38%
Investment, Acquisition Date	Aug. 10, 2021		Aug. 10, 2021
Investment Maturity Date	Jul. 25, 2025		Jul. 25, 2025
Investment Owned, Balance, Principal Amount	$ 997		$ 1,000
Investment Owned, at Fair Value	$ 988		$ 991
Investment, Identifier [Axis]: SI Holdings, Inc. (Integrated Polymer Solutions), Senior Secured Loans, Four, Due 7/25/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SHIHoldingsIncMember		mcip:ApiHoldingsIiiCorpMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Aerospace & Defense		Aerospace & Defense
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.00%
Investment Interest Rate	10.96%		10.38%
Investment, Acquisition Date	Jun. 15, 2021		Jun. 15, 2021
Investment Maturity Date	Jul. 25, 2025		Jul. 25, 2025
Investment Owned, Balance, Principal Amount	$ 1,021		$ 1,024
Investment Owned, at Fair Value	$ 1,012		$ 1,015
Investment, Identifier [Axis]: SI Holdings, Inc. (Integrated Polymer Solutions), Senior Secured Loans, One, Due 7/25/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SHIHoldingsIncMember		mcip:ApiHoldingsIiiCorpMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Aerospace & Defense		Aerospace & Defense
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.00%
Investment Interest Rate	10.96%		10.38%
Investment, Acquisition Date	Jul. 25, 2019		Jul. 25, 2019
Investment Maturity Date	Jul. 25, 2025		Jul. 25, 2025
Investment Owned, Balance, Principal Amount	$ 1,930		$ 1,935
Investment Owned, at Fair Value	$ 1,913		$ 1,918
Investment, Identifier [Axis]: SI Holdings, Inc. (Integrated Polymer Solutions), Senior Secured Loans, Three, Due 7/25/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SHIHoldingsIncMember		mcip:ApiHoldingsIiiCorpMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Aerospace & Defense		Aerospace & Defense
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.00%
Investment Interest Rate	10.96%		10.38%
Investment, Acquisition Date	Feb. 17, 2021		Feb. 17, 2021
Investment Maturity Date	Jul. 25, 2025		Jul. 25, 2025
Investment Owned, Balance, Principal Amount	$ 1,742		$ 1,747
Investment Owned, at Fair Value	$ 1,726		$ 1,732
Investment, Identifier [Axis]: SI Holdings, Inc. (Integrated Polymer Solutions), Senior Secured Loans, Two, Due 7/25/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SHIHoldingsIncMember		mcip:ApiHoldingsIiiCorpMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Aerospace & Defense		Aerospace & Defense
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.00%		6.00%
Investment Interest Rate	10.96%		10.38%
Investment, Acquisition Date	Dec. 24, 2019		Dec. 24, 2019
Investment Maturity Date	Jul. 25, 2025		Jul. 25, 2025
Investment Owned, Balance, Principal Amount	$ 1,007		$ 1,010
Investment Owned, at Fair Value	$ 998		$ 1,001
Investment, Identifier [Axis]: SIP Care Services, LLC (Delayed Draw), Senior Secured Loans, Due 12/30/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SipCareServicesLlcMember		mcip:SipCareServicesLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	10.41%		9.99%
Investment, Acquisition Date	Dec. 30, 2021		Dec. 30, 2021
Investment Maturity Date	Dec. 30, 2026		Dec. 30, 2026
Investment Owned, Balance, Principal Amount	$ 3,040		$ 3,040
Investment, Identifier [Axis]: SIP Care Services, LLC (Revolver), Senior Secured Loans, Due 12/30/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SipCareServicesLlcMember		mcip:SipCareServicesLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	10.41%		10.07%
Investment, Acquisition Date	Dec. 30, 2021		Dec. 30, 2021
Investment Maturity Date	Dec. 30, 2026		Dec. 30, 2026
Investment Owned, Balance, Principal Amount	$ 760		$ 760
Investment Owned, at Fair Value	$ 143		$ 144
Investment, Identifier [Axis]: SIP Care Services, LLC, Senior Secured Loans, Due 12/30/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SipCareServicesLlcMember		mcip:SipCareServicesLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	10.41%		9.99%
Investment, Acquisition Date	Dec. 30, 2021		Dec. 30, 2021
Investment Maturity Date	Dec. 30, 2026		Dec. 30, 2026
Investment Owned, Balance, Principal Amount	$ 3,762		$ 3,772
Investment Owned, at Fair Value	$ 3,541		$ 3,583
Investment, Identifier [Axis]: Sabrosura Foods Llc Et Al Equity Securities Class AAA Units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SabrosuraFoodsLlcEtAlMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:BeverageFoodAndTobaccoSectorMember
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Acquisition Date	Mar. 17, 2023
Investment Owned, at Fair Value	$ 5
Investment, Identifier [Axis]: Sabrosura Foods, LLC et al (Revolver), Senior Secured Loans, due 10/18/2024
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SabrosuraFoodsLlcEtAlMember		mcip:SabrosuraFoodsLlcEtAlMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:BeverageFoodAndTobaccoSectorMember		Beverage, Food & Tobacco
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.50%		5.50%
Investment Interest Rate	10.45%		10.23%
Investment, Acquisition Date	Oct. 18, 2019		Oct. 18, 2019
Investment Maturity Date	Oct. 18, 2024		Oct. 18, 2024
Investment Owned, Balance, Principal Amount	$ 1,286		$ 1,286
Investment Owned, at Fair Value	$ 1,272		$ 1,009
Investment, Identifier [Axis]: Sabrosura Foods, LLC et al, Equity Securities, Class A interests
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SabrosuraFoodsLlcEtAlMember		mcip:SabrosuraFoodsLlcEtAlMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:BeverageFoodAndTobaccoSectorMember		Beverage, Food & Tobacco
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Oct. 18, 2019		Oct. 18, 2019
Investment Owned, at Fair Value			$ 4
Investment, Identifier [Axis]: Sabrosura Foods, LLC et al, Equity Securities, Class AA units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SabrosuraFoodsLlcEtAlMember		mcip:SabrosuraFoodsLlcEtAlMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:BeverageFoodAndTobaccoSectorMember		Beverage, Food & Tobacco
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Nov. 22, 2022		Nov. 22, 2022
Investment Owned, at Fair Value	$ 4		$ 7
Investment, Identifier [Axis]: Sabrosura Foods, LLC et al, Senior Secured Loans, One, Due 10/18/2024
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:SabrosuraFoodsLlcEtAlMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Beverage, Food & Tobacco
Investment, Variable Interest Rate, Type [Extensible Enumeration]			LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			5.50%
Investment Interest Rate			9.89%
Investment, Acquisition Date			Oct. 18, 2019
Investment Maturity Date			Oct. 18, 2024
Investment Owned, Balance, Principal Amount			$ 5,037
Investment Owned, at Fair Value			$ 4,984
Investment, Identifier [Axis]: Sabrosura Foods, LLC et al, Senior Secured Loans, Two, due 10/18/2024
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SabrosuraFoodsLlcEtAlMember		mcip:SabrosuraFoodsLlcEtAlMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:BeverageFoodAndTobaccoSectorMember		Beverage, Food & Tobacco
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.50%		5.50%
Investment Interest Rate	10.33%		9.91%
Investment, Acquisition Date	Oct. 18, 2019		Oct. 18, 2019
Investment Maturity Date	Oct. 18, 2024		Oct. 18, 2024
Investment Owned, Balance, Principal Amount	$ 261		$ 285
Investment Owned, at Fair Value	$ 259		$ 282
Investment, Identifier [Axis]: Sabrosura Foods, LLC et al, Senior Secured Loans, due 10/18/2024
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SabrosuraFoodsLlcEtAlMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:BeverageFoodAndTobaccoSectorMember
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	5.50%
Investment Interest Rate	10.34%
Investment, Acquisition Date	Oct. 18, 2019
Investment Maturity Date	Oct. 18, 2024
Investment Owned, Balance, Principal Amount	$ 4,624
Investment Owned, at Fair Value	$ 4,576
Investment, Identifier [Axis]: Sandvine Corporation, Senior Loans, Due 10/31/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SandvineCorporationMember		mcip:SandvineCorporationMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Telecommunications		Telecommunications
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	4.50%		4.50%
Investment Interest Rate	9.33%		8.88%
Investment, Acquisition Date	Mar. 08, 2021		Mar. 08, 2021
Investment Maturity Date	Oct. 31, 2025		Oct. 31, 2025
Investment Owned, Balance, Principal Amount	$ 1,159		$ 1,159
Investment Owned, at Fair Value	$ 1,100		$ 1,104
Investment, Identifier [Axis]: Second Avenue S F R Holdings I I L L C ( Revolver), Senior Secured Loans, Due 8/9/2024
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Second Avenue S F R Holdings I I L L C [ Member]		Second Avenue S F R Holdings I I L L C [ Member]
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			FIRE Real Estate Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment Interest Rate	11.66%		11.12%
Investment, Acquisition Date	Aug. 11, 2021		Aug. 11, 2021
Investment Maturity Date	Aug. 09, 2024		Aug. 09, 2024
Investment Owned, Balance, Principal Amount	$ 4,875		$ 4,875
Investment Owned, at Fair Value	$ 4,743		4,755
Investment, Identifier [Axis]: Second Avenue SFR Holdings II LLC (Revolver)
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments	Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Second Avenue S F R Holdings I I L L C [ Member]	Second Avenue S F R Holdings I I L L C [ Member]
Investment Owned, at Fair Value	$ 4,743	$ 2,591	$ 4,755	$ 2,104
Investment, Identifier [Axis]: Securly, Inc, Senior Secured Loans, One, Due 4/22/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SecurlyIncMember		mcip:SecurlyIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment Interest Rate	11.83%		11.41%
Investment, Acquisition Date	Apr. 20, 2022		Apr. 20, 2022
Investment Maturity Date	Apr. 22, 2027		Apr. 22, 2027
Investment Owned, Balance, Principal Amount	$ 3,702		$ 3,702
Investment Owned, at Fair Value	$ 3,689		$ 3,642
Investment, Identifier [Axis]: Securly, Inc, Senior Secured Loans, Three, Due 4/22/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SecurlyIncMember		mcip:SecurlyIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment Interest Rate	11.95%		11.73%
Investment, Acquisition Date	Apr. 22, 2021		Apr. 22, 2021
Investment Maturity Date	Apr. 22, 2027		Apr. 22, 2027
Investment Owned, Balance, Principal Amount	$ 1,938		$ 1,938
Investment Owned, at Fair Value	$ 1,931		$ 1,907
Investment, Identifier [Axis]: Securly, Inc, Senior Secured Loans, Two, Due 4/22/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SecurlyIncMember		mcip:SecurlyIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment Interest Rate	12.16%		11.73%
Investment, Acquisition Date	Apr. 22, 2021		Apr. 22, 2021
Investment Maturity Date	Apr. 22, 2027		Apr. 22, 2027
Investment Owned, Balance, Principal Amount	$ 8,400		$ 8,400
Investment Owned, at Fair Value	$ 8,369		$ 8,264
Investment, Identifier [Axis]: Securly, Inc. (Delayed Draw), Senior Secured Loans, Due 4/22/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SecurlyIncMember		mcip:SecurlyIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment Interest Rate	11.95%		11.69%
Investment, Acquisition Date	Apr. 20, 2022		Apr. 20, 2022
Investment Maturity Date	Apr. 22, 2027		Apr. 22, 2027
Investment Owned, Balance, Principal Amount	$ 2,585		$ 2,585
Investment Owned, at Fair Value	$ 1,802		$ 1,780
Investment, Identifier [Axis]: Securly, Inc. (Revolver), Senior Secured Loans, Due 4/22/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SecurlyIncMember		mcip:SecurlyIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment Interest Rate	12.16%		11.73%
Investment, Acquisition Date	Apr. 22, 2021		Apr. 22, 2021
Investment Maturity Date	Apr. 22, 2027		Apr. 22, 2027
Investment Owned, Balance, Principal Amount	$ 969		$ 969
Investment, Identifier [Axis]: Seran BioScience, LLC (Delayed Draw), Senior Secured Loans, Due 7/8/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SeranBioScienceLLCMember		mcip:SeranBioScienceLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	11.82%		10.67%
Investment, Acquisition Date	Jul. 08, 2022		Jul. 08, 2022
Investment Maturity Date	Jul. 08, 2027		Jul. 08, 2027
Investment Owned, Balance, Principal Amount	$ 2,218		$ 2,221
Investment Owned, at Fair Value	$ 1,590		$ 1,056
Investment, Identifier [Axis]: Seran BioScience, LLC (Revolver), Senior Secured Loans, Due 7/8/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SeranBioScienceLLCMember		mcip:SeranBioScienceLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	10.99%		9.96%
Investment, Acquisition Date	Dec. 31, 2020		Dec. 31, 2020
Investment Maturity Date	Jul. 08, 2027		Jul. 08, 2027
Investment Owned, Balance, Principal Amount	$ 356		$ 356
Investment, Identifier [Axis]: Seran BioScience, LLC, Equity Securities, Common units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SeranBioScienceLLCMember		mcip:SeranBioScienceLLCMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Dec. 31, 2020		Dec. 31, 2020
Investment Owned, at Fair Value	$ 471		$ 429
Investment, Identifier [Axis]: Seran BioScience, LLC, Senior Secured Loans, Due 7/8/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SeranBioScienceLLCMember		mcip:SeranBioScienceLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	10.99%		9.96%
Investment, Acquisition Date	Dec. 31, 2020		Dec. 31, 2020
Investment Maturity Date	Jul. 08, 2027		Jul. 08, 2027
Investment Owned, Balance, Principal Amount	$ 1,960		$ 1,965
Investment Owned, at Fair Value	$ 1,953		1,948
Investment, Identifier [Axis]: SheerTrans Solutions, LLC
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SheertransSolutionsLlcMember
Investment Owned, at Fair Value	$ 5,089		5,101
Investment, Identifier [Axis]: SheerTrans Solutions, LLC (8,642,579 preferred interests)
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	mcip:SheertransSolutionsLlcMember
Investment Owned, at Fair Value	$ 8,729		$ 8,643
Investment, Identifier [Axis]: SheerTrans Solutions, LLC (Revolver)
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SheertransSolutionsLlcMember
Investment, Identifier [Axis]: SheerTrans Solutions, LLC (Revolver), Senior Secured Loans, Two, Due 7/29/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SheertransSolutionsLlcMember		mcip:SheertransSolutionsLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Transportation Sector [Member]		Transportation Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.50%		7.50%
Investment Interest Rate	12.42%		11.94%
Investment, Acquisition Date	Jul. 29, 2022		Jul. 29, 2022
Investment Maturity Date	Jul. 29, 2027		Jul. 29, 2027
Investment Owned, Balance, Principal Amount	$ 1,465		$ 1,465
Investment, Identifier [Axis]: SheerTrans Solutions, LLC, Equity Securities
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SheertransSolutionsLlcMember		mcip:SheertransSolutionsLlcMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Transportation Sector [Member]		Transportation Sector [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Jul. 29, 2022		Jul. 29, 2022
Investment Owned, at Fair Value	$ 8,729		$ 8,643
Investment, Identifier [Axis]: SheerTrans Solutions, LLC, Senior Secured Loans, One, Due 7/29/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SheertransSolutionsLlcMember		mcip:SheertransSolutionsLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Transportation Sector [Member]		Transportation Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.50%		7.50%
Investment Interest Rate	12.42%		11.94%
Investment, Acquisition Date	Jul. 29, 2022		Jul. 29, 2022
Investment Maturity Date	Jul. 29, 2027		Jul. 29, 2027
Investment Owned, Balance, Principal Amount	$ 5,089		$ 5,101
Investment Owned, at Fair Value	$ 5,089		$ 5,101
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings Inc, Senior Secured Loans, Due 12/2/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SimplicityFinancialMarketingGroupHoldingsIncMember		mcip:SimplicityFinancialMarketingGroupHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Fire Insurance		Fire Insurance
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	10.91%		10.48%
Investment, Acquisition Date	Sep. 23, 2022		Sep. 23, 2022
Investment Maturity Date	Dec. 02, 2026		Dec. 02, 2026
Investment Owned, Balance, Principal Amount	$ 9,966		$ 9,991
Investment Owned, at Fair Value	$ 9,617		$ 9,641
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings Inc. (Delayed Draw), Senior Secured Loans, Due 12/2/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SimplicityFinancialMarketingGroupHoldingsIncMember		mcip:SimplicityFinancialMarketingGroupHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Fire Insurance		Fire Insurance
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	10.91%		10.48%
Investment, Acquisition Date	Sep. 23, 2022		Sep. 23, 2022
Investment Maturity Date	Dec. 02, 2026		Dec. 02, 2026
Investment Owned, Balance, Principal Amount	$ 14,209		$ 14,223
Investment Owned, at Fair Value	$ 6,402
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings Inc. (Revolver), Senior Secured Loans, Due 12/2/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SimplicityFinancialMarketingGroupHoldingsIncMember		mcip:SimplicityFinancialMarketingGroupHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Fire Insurance		Fire Insurance
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	10.91%		10.48%
Investment, Acquisition Date	Sep. 23, 2022		Sep. 23, 2022
Investment Maturity Date	Dec. 02, 2026		Dec. 02, 2026
Investment Owned, Balance, Principal Amount	$ 761		$ 761
Investment, Identifier [Axis]: Skillsoft Corp., Equity Securites, Class A shares
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SkillsoftCorp.Member		mcip:SkillsoftCorp.Member
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		Non-US [Member]
Investment, Acquisition Date	Jun. 11, 2021		Jun. 11, 2021
Investment Owned, at Fair Value	$ 52		$ 34
Investment, Identifier [Axis]: Sound Inpatient Physicians, Inc, Senior Secured Loans, Due 6/28/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SoundInpatientPhysiciansIncMember		mcip:SoundInpatientPhysiciansIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	2.75%		2.75%
Investment Interest Rate	7.61%		7.14%
Investment, Interest Rate, Paid in Cash			7.86%
Investment, Acquisition Date	Oct. 12, 2022		Oct. 12, 2022
Investment Maturity Date	Jun. 28, 2025		Jun. 28, 2025
Investment Owned, Balance, Principal Amount	$ 2,821		$ 2,821
Investment Owned, at Fair Value	$ 2,223		$ 2,309
Investment, Identifier [Axis]: Spectrum Science Communications, L L C ( Revolver), Senior Secured Loans, due 1/25/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:SpectrumScienceCommunicationsLLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Media: Diversified & Production
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.25%
Investment Interest Rate			10.92%
Investment, Acquisition Date			Jan. 25, 2022
Investment Maturity Date			Jan. 25, 2027
Investment Owned, Balance, Principal Amount			$ 600
Investment, Identifier [Axis]: Spectrum Science Communications, L L C, Senior Secured Loans, due 1/25/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:SpectrumScienceCommunicationsLLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Media: Diversified & Production
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			6.25%
Investment Interest Rate			10.92%
Investment, Acquisition Date			Jan. 25, 2022
Investment Maturity Date			Jan. 25, 2027
Investment Owned, Balance, Principal Amount			$ 2,985
Investment Owned, at Fair Value			$ 3,015
Investment, Identifier [Axis]: Spherix Global Inc, Senior Secured Loans, Due 12/22/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SpherixGlobalIncMember		mcip:SpherixGlobalIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.36%		6.00%
Investment Interest Rate	11.03%		10.24%
Investment, Acquisition Date	Dec. 22, 2021		Dec. 22, 2021
Investment Maturity Date	Dec. 22, 2026		Dec. 22, 2026
Investment Owned, Balance, Principal Amount	$ 4,455		$ 4,466
Investment Owned, at Fair Value	$ 4,321		$ 4,450
Investment, Identifier [Axis]: Spherix Global Inc. (Revolver), Senior Secured Loans, Due 12/22/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SpherixGlobalIncMember		mcip:SpherixGlobalIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.36%		6.00%
Investment Interest Rate	11.03%		10.24%
Investment, Acquisition Date	Dec. 22, 2021		Dec. 22, 2021
Investment Maturity Date	Dec. 22, 2026		Dec. 22, 2026
Investment Owned, Balance, Principal Amount	$ 500		$ 500
Investment, Identifier [Axis]: Spherix Global Inc., Equity Securites, Class A units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SpherixGlobalInc.Member		mcip:SpherixGlobalInc.Member
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Dec. 22, 2021		Dec. 22, 2021
Investment Owned, at Fair Value	$ 189		$ 256
Investment, Identifier [Axis]: Sports Operating Holdings II, LLC (Delayed Draw), Senior Secured Loans, Due 11/3/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SportsOperatingHoldingsIiLlcMember		mcip:SportsOperatingHoldingsIiLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Diversified & Production		Media: Diversified & Production
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	10.56%		10.17%
Investment, Acquisition Date	Nov. 03, 2022		Nov. 03, 2022
Investment Maturity Date	Nov. 03, 2027		Nov. 03, 2027
Investment Owned, Balance, Principal Amount	$ 4,000		$ 4,000
Investment, Identifier [Axis]: Sports Operating Holdings II, LLC (Revolver), Senior Secured Loans, Due 11/3/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SportsOperatingHoldingsIiLlcMember		mcip:SportsOperatingHoldingsIiLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Diversified & Production		Media: Diversified & Production
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	10.56%		10.17%
Investment, Acquisition Date	Nov. 03, 2022		Nov. 03, 2022
Investment Maturity Date	Nov. 03, 2027		Nov. 03, 2027
Investment Owned, Balance, Principal Amount	$ 865		$ 865
Investment, Identifier [Axis]: Sports Operating Holdings II, LLC, Senior Secured Loans, Due 11/3/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SportsOperatingHoldingsIiLlcMember		mcip:SportsOperatingHoldingsIiLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Diversified & Production		Media: Diversified & Production
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	10.56%		10.17%
Investment, Acquisition Date	Nov. 03, 2022		Nov. 03, 2022
Investment Maturity Date	Nov. 03, 2027		Nov. 03, 2027
Investment Owned, Balance, Principal Amount	$ 4,975		$ 4,988
Investment Owned, at Fair Value	$ 4,975		$ 4,863
Investment, Identifier [Axis]: Star Compliance Mid Co, L L C, ( Revolver), Senior Secured Loans, due 1/12/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:StarComplianceMidCoLLCMember		mcip:StarComplianceMidCoLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Banking		Banking
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	11.59%		11.14%
Investment, Acquisition Date	Jan. 12, 2021		Jan. 12, 2021
Investment Maturity Date	Jan. 12, 2027		Jan. 12, 2027
Investment Owned, Balance, Principal Amount	$ 484		$ 484
Investment Owned, at Fair Value	$ 138		$ 119
Investment, Identifier [Axis]: Star Compliance Mid Co, L L C, Senior Secured Loans, One, due 1/12/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:StarComplianceMidCoLLCMember		mcip:StarComplianceMidCoLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Banking		Banking
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	11.91%		11.48%
Investment, Acquisition Date	Jan. 12, 2021		Jan. 12, 2021
Investment Maturity Date	Jan. 12, 2027		Jan. 12, 2027
Investment Owned, Balance, Principal Amount	$ 3,000		$ 3,000
Investment Owned, at Fair Value	$ 2,955		$ 2,951
Investment, Identifier [Axis]: Star Compliance Mid Co, L L C, Senior Secured Loans, Two, due 1/12/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:StarComplianceMidCoLLCMember		mcip:StarComplianceMidCoLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Banking		Banking
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	11.91%		11.48%
Investment, Acquisition Date	Oct. 12, 2021		Oct. 12, 2021
Investment Maturity Date	Jan. 12, 2027		Jan. 12, 2027
Investment Owned, Balance, Principal Amount	$ 503		$ 503
Investment Owned, at Fair Value	$ 496		$ 495
Investment, Identifier [Axis]: StormTrap, LLC, Delayed Draw, , Unitranche Loans, Due 3/24/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:StormTrapLLCMember		mcip:StormTrapLLCMember
Investment, Type [Extensible Enumeration]	Unitranche Debt [Member]		Unitranche Debt [Member]
Investment, Industry Sector [Extensible Enumeration]			Environmental Industries
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.00%		5.00%
Investment Interest Rate	9.77%		9.22%
Investment, Acquisition Date	Mar. 25, 2022		Mar. 25, 2022
Investment Maturity Date	Mar. 24, 2028		Mar. 24, 2028
Investment Owned, Balance, Principal Amount	$ 2,222		$ 2,222
Investment, Identifier [Axis]: StormTrap, LLC, Equity Securities, Class A common units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:StormTrapLLCMember		mcip:StormTrapLLCMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Environmental Industries		Environmental Industries
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Mar. 25, 2022		Mar. 25, 2022
Investment Owned, at Fair Value	$ 165		$ 213
Investment, Identifier [Axis]: StormTrap, LLC, Equity Securities, Class A preferred units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:StormTrapLLCMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Environmental Industries		Environmental Industries
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Interest Rate, Paid in Kind	8.00%		8.00%
Investment, Acquisition Date	Mar. 25, 2022		Mar. 25, 2022
Investment Owned, at Fair Value	$ 640		$ 640
Investment, Identifier [Axis]: StormTrap, LLC, Unitranche Loans, Due 3/24/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:StormTrapLLCMember		mcip:StormTrapLLCMember
Investment, Type [Extensible Enumeration]	Unitranche Debt [Member]		Unitranche Debt [Member]
Investment, Industry Sector [Extensible Enumeration]			Environmental Industries
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.00%		5.00%
Investment Interest Rate	9.77%		9.22%
Investment, Acquisition Date	Mar. 25, 2022		Mar. 25, 2022
Investment Maturity Date	Mar. 24, 2028		Mar. 24, 2028
Investment Owned, Balance, Principal Amount	$ 7,497		$ 7,516
Investment Owned, at Fair Value	$ 7,497		$ 7,516
Investment, Identifier [Axis]: Streamland Media MidCo LLC, Senior Secured Loans, One, Due 8/31/2023
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:StreamlandMediaMidcoLlcMember		mcip:StreamlandMediaMidcoLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Diversified & Production		Media: Diversified & Production
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	11.69%		11.11%
Investment, Acquisition Date	Aug. 26, 2019		Aug. 26, 2019
Investment Maturity Date	Aug. 31, 2023		Aug. 31, 2023
Investment Owned, Balance, Principal Amount	$ 1,969		$ 1,974
Investment Owned, at Fair Value	$ 1,969		$ 1,974
Investment, Identifier [Axis]: Streamland Media MidCo LLC, Senior Secured Loans, Two, Due 8/31/2023
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:StreamlandMediaMidcoLlcMember		mcip:StreamlandMediaMidcoLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Diversified & Production		Media: Diversified & Production
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	11.69%		11.11%
Investment, Acquisition Date	Mar. 07, 2022		Mar. 07, 2022
Investment Maturity Date	Aug. 31, 2023		Aug. 31, 2023
Investment Owned, Balance, Principal Amount	$ 533		$ 535
Investment Owned, at Fair Value	$ 533		$ 535
Investment, Identifier [Axis]: Sundance Group Holdings, Inc, Senior Secured Loans, One, Due 7/2/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SundanceGroupHoldingsIncMember		mcip:SundanceGroupHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	10.95%		10.75%
Investment, Acquisition Date	Jul. 02, 2021		Jul. 02, 2021
Investment Maturity Date	Jul. 02, 2027		Jul. 02, 2027
Investment Owned, Balance, Principal Amount	$ 4,148		$ 4,148
Investment Owned, at Fair Value	$ 4,121		$ 4,131
Investment, Identifier [Axis]: Sundance Group Holdings, Inc, Senior Secured Loans, Three, Due 7/2/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SundanceGroupHoldingsIncMember		mcip:SundanceGroupHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	11.09%		10.75%
Investment, Acquisition Date	Jul. 02, 2021		Jul. 02, 2021
Investment Maturity Date	Jul. 02, 2027		Jul. 02, 2027
Investment Owned, Balance, Principal Amount	$ 1,244		$ 1,244
Investment Owned, at Fair Value	$ 1,236		$ 1,239
Investment, Identifier [Axis]: Sundance Group Holdings, Inc, Senior Secured Loans, Two, Due 7/2/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SundanceGroupHoldingsIncMember		mcip:SundanceGroupHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	11.16%		10.93%
Investment, Acquisition Date	Nov. 30, 2022		Nov. 30, 2022
Investment Maturity Date	Jul. 02, 2027		Jul. 02, 2027
Investment Owned, Balance, Principal Amount	$ 166		$ 166
Investment Owned, at Fair Value	$ 165		$ 165
Investment, Identifier [Axis]: Sundance Group Holdings, Inc. (Revolver), Senior Secured Loans, Due 7/2/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:SundanceGroupHoldingsIncMember		mcip:SundanceGroupHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.35%		6.25%
Investment Interest Rate	11.18%		10.75%
Investment, Acquisition Date	Jul. 02, 2021		Jul. 02, 2021
Investment Maturity Date	Jul. 02, 2027		Jul. 02, 2027
Investment Owned, Balance, Principal Amount	$ 498		$ 498
Investment Owned, at Fair Value	$ 49
Investment, Identifier [Axis]: T C F I I I O W L Buyer L L C, Senior Secured Loans, One, due 4/17/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:TCFIIIOWLBuyerLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Construction & Building
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	5.50%
Investment Interest Rate	10.42%
Investment, Acquisition Date	Apr. 19, 2021
Investment Maturity Date	Apr. 17, 2026
Investment Owned, Balance, Principal Amount	$ 4,421
Investment Owned, at Fair Value	$ 4,421
Investment, Identifier [Axis]: T C F I I I O W L Buyer L L C, Senior Secured Loans, Three, due 4/17/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:TCFIIIOWLBuyerLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Construction & Building
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	5.50%
Investment Interest Rate	10.42%
Investment, Acquisition Date	Dec. 17, 2021
Investment Maturity Date	Apr. 17, 2026
Investment Owned, Balance, Principal Amount	$ 4,845
Investment Owned, at Fair Value	$ 4,845
Investment, Identifier [Axis]: T C F I I I O W L Buyer L L C, Senior Secured Loans, Two, due 4/17/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:TCFIIIOWLBuyerLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Construction & Building
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	5.50%
Investment Interest Rate	10.42%
Investment, Acquisition Date	Apr. 19, 2021
Investment Maturity Date	Apr. 17, 2026
Investment Owned, Balance, Principal Amount	$ 5,398
Investment Owned, at Fair Value	$ 5,399
Investment, Identifier [Axis]: TCFIII Owl Buyer LLC, Senior Secured Loans, One, Due 4/17/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:TCFIIIOWLBuyerLLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Construction & Building
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			5.50%
Investment Interest Rate			9.94%
Investment, Acquisition Date			Apr. 19, 2021
Investment Maturity Date			Apr. 17, 2026
Investment Owned, Balance, Principal Amount			$ 4,433
Investment Owned, at Fair Value			$ 4,438
Investment, Identifier [Axis]: TCFIII Owl Buyer LLC, Senior Secured Loans, Three, Due 4/17/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:TCFIIIOWLBuyerLLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Construction & Building
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			5.50%
Investment Interest Rate			9.94%
Investment, Acquisition Date			Dec. 17, 2021
Investment Maturity Date			Apr. 17, 2026
Investment Owned, Balance, Principal Amount			$ 4,857
Investment Owned, at Fair Value			$ 4,863
Investment, Identifier [Axis]: TCFIII Owl Buyer LLC, Senior Secured Loans, Two, Due 4/17/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:TCFIIIOWLBuyerLLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Construction & Building
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			5.50%
Investment Interest Rate			9.94%
Investment, Acquisition Date			Apr. 19, 2021
Investment Maturity Date			Apr. 17, 2026
Investment Owned, Balance, Principal Amount			$ 5,412
Investment Owned, at Fair Value			$ 5,419
Investment, Identifier [Axis]: TEAM Public Choices, LLC, Senior Secured Loans, Due 12/17/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:TEAMPublicChoicesLLCMember		mcip:TEAMPublicChoicesLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:FireFinanceMember		mcip:FireFinanceMember
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.00%		5.00%
Investment Interest Rate	9.95%		9.95%
Investment, Acquisition Date	Aug. 23, 2022		Aug. 23, 2022
Investment Maturity Date	Dec. 17, 2027		Dec. 17, 2027
Investment Owned, Balance, Principal Amount	$ 4,549		$ 4,560
Investment Owned, at Fair Value	$ 4,435		$ 4,378
Investment, Identifier [Axis]: The GEO Group, Inc, Senior Secured Loans, Due 3/23/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:GeoGroupIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	7.13%
Investment Interest Rate	11.93%
Investment, Acquisition Date	Mar. 28, 2023
Investment Maturity Date	Mar. 23, 2027
Investment Owned, Balance, Principal Amount	$ 3,000
Investment Owned, at Fair Value	$ 3,030
Investment, Identifier [Axis]: The Kyjen Company, L L C ( Revolver), Senior Secured Loans, due 4/3/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:TheKyjenCompanyLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Consumer Sector, Non- Durable [ Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	7.10%
Investment, Interest Rate, Paid in Cash	11.45%
Investment, Interest Rate, Paid in Kind	0.50%
Investment, Acquisition Date	May 14, 2021
Investment Maturity Date	Apr. 03, 2026
Investment Owned, Balance, Principal Amount	$ 315
Investment Owned, at Fair Value	$ 264
Investment, Identifier [Axis]: The Kyjen Company, L L C, Senior SEcured Loans, Two, Due 4/3/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:TheKyjenCompanyLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Consumer Sector, Non- Durable [ Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	7.00%
Investment, Interest Rate, Paid in Kind	11.95%
Investment, Acquisition Date	Sep. 13, 2022
Investment Maturity Date	Apr. 03, 2026
Investment Owned, Balance, Principal Amount	$ 1
Investment Owned, at Fair Value	$ 1
Investment, Identifier [Axis]: The Kyjen Company, L L C, Senior Secured Loans, due 4/3/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:TheKyjenCompanyLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Consumer Sector, Non- Durable [ Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	7.25%
Investment, Interest Rate, Paid in Cash	12.14%
Investment, Interest Rate, Paid in Kind	0.50%
Investment, Acquisition Date	May 14, 2021
Investment Maturity Date	Apr. 03, 2026
Investment Owned, Balance, Principal Amount	$ 2,955
Investment Owned, at Fair Value	$ 2,916
Investment, Identifier [Axis]: The Kyjen Company, LLC (Revolver), Senior Secured Loans, Due 4/3/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:TheKyjenCompanyLLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Consumer Sector, Non- Durable [ Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Basis Spread, Variable Rate			7.10%
Investment, Interest Rate, Paid in Cash			10.92%
Investment, Interest Rate, Paid in Kind			0.50%
Investment, Acquisition Date			May 14, 2021
Investment Maturity Date			Apr. 03, 2026
Investment Owned, Balance, Principal Amount			$ 315
Investment Owned, at Fair Value			$ 265
Investment, Identifier [Axis]: The Kyjen Company, LLC, Senior Secured Loans, One, Due 4/3/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:TheKyjenCompanyLLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Consumer Sector, Non- Durable [ Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Basis Spread, Variable Rate			7.15%
Investment, Interest Rate, Paid in Cash			11.15%
Investment, Interest Rate, Paid in Kind			0.50%
Investment, Acquisition Date			May 14, 2021
Investment Maturity Date			Apr. 03, 2026
Investment Owned, Balance, Principal Amount			$ 2,959
Investment Owned, at Fair Value			$ 2,925
Investment, Identifier [Axis]: The Kyjen Company, LLC, Senior Secured Loans, Two, Due 4/3/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:TheKyjenCompanyLLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Consumer Sector, Non- Durable [ Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Basis Spread, Variable Rate			7.00%
Investment, Interest Rate, Paid in Kind			11.42%
Investment, Acquisition Date			Sep. 13, 2022
Investment Maturity Date			Apr. 03, 2026
Investment Owned, Balance, Principal Amount			$ 1
Investment Owned, at Fair Value			$ 1
Investment, Identifier [Axis]: Thrasio, L L C, Senior Secured Loans, due 12/18/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ThrasioLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Consumer Sector, Non- Durable [ Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	7.00%
Investment Interest Rate	12.16%
Investment, Acquisition Date	Dec. 18, 2020
Investment Maturity Date	Dec. 18, 2026
Investment Owned, Balance, Principal Amount	$ 4,878
Investment Owned, at Fair Value	$ 4,841
Investment, Identifier [Axis]: Thrasio, LLC, Senior Secured Loans, Due 12/18/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:ThrasioLLCMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Consumer Sector, Non- Durable [ Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]			LIBOR
Investment, Basis Spread, Variable Rate			7.00%
Investment Interest Rate			11.73%
Investment, Acquisition Date			Dec. 18, 2020
Investment Maturity Date			Dec. 18, 2026
Investment Owned, Balance, Principal Amount			$ 4,890
Investment Owned, at Fair Value			$ 4,890
Investment, Identifier [Axis]: Thryv, Inc, Senior Secured Loans, Due 2/27/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ThryvIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	8.50%
Investment Interest Rate	13.34%
Investment, Acquisition Date	Sep. 07, 2022
Investment Maturity Date	Feb. 27, 2026
Investment Owned, Balance, Principal Amount	$ 8,404
Investment Owned, at Fair Value	$ 8,367
Investment, Identifier [Axis]: Thryv, Inc, Senior Secured Loans, Due 3/1/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:ThryvIncMember
Investment, Type [Extensible Enumeration]			Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]			LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Basis Spread, Variable Rate			8.50%
Investment Interest Rate			12.89%
Investment, Acquisition Date			Sep. 07, 2022
Investment Maturity Date			Mar. 01, 2026
Investment Owned, Balance, Principal Amount			$ 9,213
Investment Owned, at Fair Value			$ 9,102
Investment, Identifier [Axis]: TigerConnect, Inc, Senior Secured Loans, Due 2/16/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:TigerConnectIncMember		mcip:TigerConnectIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.76%		7.25%
Investment Interest Rate	11.58%
Investment, Interest Rate, Paid in Cash	8.20%		7.86%
Investment, Interest Rate, Paid in Kind	3.38%		3.63%
Investment, Acquisition Date	Feb. 16, 2022		Feb. 16, 2022
Investment Maturity Date	Feb. 16, 2028		Feb. 16, 2028
Investment Owned, Balance, Principal Amount	$ 10,000		$ 10,000
Investment Owned, at Fair Value	$ 9,888		$ 9,875
Investment, Identifier [Axis]: TigerConnect, Inc. (Delayed Draw), Senior Secured Loans, Due 2/16/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:TigerConnectIncMember		mcip:TigerConnectIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.76%		7.25%
Investment, Interest Rate, Paid in Kind			3.63%
Investment, Acquisition Date	Feb. 16, 2022		Feb. 16, 2022
Investment Maturity Date	Feb. 16, 2028		Feb. 16, 2028
Investment Owned, Balance, Principal Amount	$ 750		$ 413
Investment Owned, at Fair Value	$ 184		$ 91
Investment, Identifier [Axis]: TigerConnect, Inc. (Revolver), Senior Secured Loans, Due 2/16/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:TigerConnectIncMember		mcip:TigerConnectIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.76%		7.25%
Investment Interest Rate	11.59%
Investment, Interest Rate, Paid in Kind			11.49%
Investment, Acquisition Date	Feb. 16, 2022		Feb. 16, 2022
Investment Maturity Date	Feb. 16, 2028		Feb. 16, 2028
Investment Owned, Balance, Principal Amount	$ 1,429		$ 1,429
Investment, Identifier [Axis]: Transact Holdings Inc, Senior Secured Loans, Due 4/30/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:TransactHoldingsIncMember		mcip:TransactHoldingsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	4.25%		4.25%
Investment Interest Rate	9.09%		8.63%
Investment, Acquisition Date	Apr. 18, 2019		Apr. 18, 2019
Investment Maturity Date	Apr. 30, 2026		Apr. 30, 2026
Investment Owned, Balance, Principal Amount	$ 716		$ 718
Investment Owned, at Fair Value	$ 712		$ 687
Investment, Identifier [Axis]: Trilon Group, LLC, Senior Secured Loans, One, Due 5/25/2029
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:TrilonGroupLlcMember		mcip:TrilonGroupLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Environmental Industries		Environmental Industries
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	11.08%		10.48%
Investment, Acquisition Date	Oct. 28, 2022		Oct. 28, 2022
Investment Maturity Date	May 25, 2029		May 25, 2029
Investment Owned, Balance, Principal Amount	$ 5,500		$ 5,500
Investment Owned, at Fair Value	$ 5,448		$ 5,335
Investment, Identifier [Axis]: Trilon Group, LLC, Senior Secured Loans, Two, Due 5/25/2029
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:TrilonGroupLlcMember		mcip:TrilonGroupLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Environmental Industries		Environmental Industries
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	11.51%		10.90%
Investment, Acquisition Date	Oct. 28, 2022		Oct. 28, 2022
Investment Maturity Date	May 25, 2029		May 25, 2029
Investment Owned, Balance, Principal Amount	$ 4,400		$ 4,400
Investment Owned, at Fair Value	$ 4,358		$ 393
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Senior Secured Loans, Five, due 12/14/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:Truck-LiteCo.LLCMember		mcip:Truck-LiteCo.LLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Automotive		Automotive
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	11.14%		11.14%
Investment, Acquisition Date	Nov. 23, 2021		Nov. 23, 2021
Investment Maturity Date	Dec. 14, 2026		Dec. 14, 2026
Investment Owned, Balance, Principal Amount	$ 556		$ 557
Investment Owned, at Fair Value	$ 553		$ 556
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Senior Secured Loans, Four, due 12/14/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:Truck-LiteCo.LLCMember		mcip:Truck-LiteCo.LLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Automotive		Automotive
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	11.14%		11.14%
Investment, Acquisition Date	Mar. 11, 2020		Mar. 11, 2020
Investment Maturity Date	Dec. 14, 2026		Dec. 14, 2026
Investment Owned, Balance, Principal Amount	$ 500		$ 501
Investment Owned, at Fair Value	$ 497		$ 501
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Senior Secured Loans, One, due 12/14/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:Truck-LiteCo.LLCMember		mcip:Truck-LiteCo.LLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Automotive		Automotive
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	11.14%		11.14%
Investment, Acquisition Date	Jul. 08, 2022		Jul. 08, 2022
Investment Maturity Date	Dec. 14, 2026		Dec. 14, 2026
Investment Owned, Balance, Principal Amount	$ 127		$ 128
Investment Owned, at Fair Value	$ 127		$ 128
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Senior Secured Loans, Six, due 12/14/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:Truck-LiteCo.LLCMember		mcip:Truck-LiteCo.LLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Automotive		Automotive
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	11.14%		11.14%
Investment, Acquisition Date	Nov. 23, 2021		Nov. 23, 2021
Investment Maturity Date	Dec. 14, 2026		Dec. 14, 2026
Investment Owned, Balance, Principal Amount	$ 713		$ 714
Investment Owned, at Fair Value	$ 709		$ 714
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Senior Secured Loans, Three, due 12/14/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:Truck-LiteCo.LLCMember		mcip:Truck-LiteCo.LLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Automotive		Automotive
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	11.14%		11.14%
Investment, Acquisition Date	Nov. 23, 2021		Nov. 23, 2021
Investment Maturity Date	Dec. 14, 2026		Dec. 14, 2026
Investment Owned, Balance, Principal Amount	$ 626		$ 628
Investment Owned, at Fair Value	$ 623		$ 627
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Senior Secured Loans, Two, due 12/14/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:Truck-LiteCo.LLCMember		mcip:Truck-LiteCo.LLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Automotive		Automotive
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	11.14%		11.14%
Investment, Acquisition Date	Mar. 11, 2020		Mar. 11, 2020
Investment Maturity Date	Dec. 14, 2026		Dec. 14, 2026
Investment Owned, Balance, Principal Amount	$ 3,374		$ 3,383
Investment Owned, at Fair Value	$ 3,355		$ 3,379
Investment, Identifier [Axis]: Unanet, Inc, Senior Secured Loans, Due 12/8/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:UnanetIncMember		mcip:UnanetIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	10.97%		10.97%
Investment, Acquisition Date	Dec. 09, 2022		Dec. 09, 2022
Investment Maturity Date	Dec. 08, 2028		Dec. 08, 2028
Investment Owned, Balance, Principal Amount	$ 22,000		$ 22,000
Investment Owned, at Fair Value	$ 22,000		$ 21,560
Investment, Identifier [Axis]: Unanet, Inc. (Delayed Draw), Senior Secured Loans, Due 12/8/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:UnanetIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	10.97%		10.97%
Investment, Acquisition Date	Dec. 09, 2022		Dec. 09, 2022
Investment Maturity Date	Dec. 08, 2028		Dec. 08, 2028
Investment Owned, Balance, Principal Amount	$ 6,947		$ 6,947
Investment, Identifier [Axis]: Unanet, Inc. (Revolver), Senior Secured Loans, Due 12/8/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:UnanetIncMember		mcip:UnanetIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	10.97%		10.97%
Investment, Acquisition Date	Dec. 09, 2022		Dec. 09, 2022
Investment Maturity Date	Dec. 08, 2028		Dec. 08, 2028
Investment Owned, Balance, Principal Amount	$ 2,316		$ 2,316
Investment, Identifier [Axis]: Unanet, Inc., Equity Securities, Common Stock
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:UnanetIncMember		mcip:UnanetIncMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Dec. 05, 2022		Dec. 05, 2022
Investment Owned, at Fair Value	$ 1,637		$ 1,621
Investment, Identifier [Axis]: VB E1, LLC, Unitranche Loans, Due 11/18/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:VBE1LLCMember		mcip:VBE1LLCMember
Investment, Type [Extensible Enumeration]	Unitranche Debt [Member]		Unitranche Debt [Member]
Investment, Industry Sector [Extensible Enumeration]			Telecommunications
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.65%		7.65%
Investment Interest Rate	12.81%		12.38%
Investment, Acquisition Date	Nov. 18, 2020		Nov. 18, 2020
Investment Maturity Date	Nov. 18, 2026		Nov. 18, 2026
Investment Owned, Balance, Principal Amount	$ 3,000		$ 3,000
Investment Owned, at Fair Value	$ 3,006		$ 3,009
Investment, Identifier [Axis]: Verdantas LLC (Delayed Draw), Senior Secured Loans, Due 7/1/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:VerdantasLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	7.60%
Investment Interest Rate	12.27%
Investment, Acquisition Date	Feb. 28, 2023
Investment Maturity Date	Jul. 01, 2025
Investment Owned, Balance, Principal Amount	$ 2,000
Investment, Identifier [Axis]: Verdantas LLC, Senior Secured Loans, Due 7/1/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:VerdantasLlcMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	7.60%
Investment Interest Rate	12.27%
Investment, Acquisition Date	Feb. 28, 2023
Investment Maturity Date	Jul. 01, 2025
Investment Owned, Balance, Principal Amount	$ 4,000
Investment Owned, at Fair Value	$ 3,880
Investment, Identifier [Axis]: Viad Corp, Senior Loans, Due 7/30/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ViadCorpMember		mcip:ViadCorpMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Consumer		Services: Consumer
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	Non-US [Member]		country:US
Investment, Basis Spread, Variable Rate	5.00%		5.00%
Investment Interest Rate	9.92%		9.38%
Investment, Acquisition Date	Sep. 12, 2022		Sep. 12, 2022
Investment Maturity Date	Jul. 28, 2028		Jul. 30, 2028
Investment Owned, Balance, Principal Amount	$ 4,962		$ 4,975
Investment Owned, at Fair Value	$ 4,751		$ 4,718
Investment, Identifier [Axis]: Vice Group Holding Inc, Senior Secured Loans, Four, Due 5/12/2023
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ViceGroupHoldingIncMember		mcip:ViceGroupHoldingIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Broadcasting & Subscription		Media: Broadcasting & Subscription
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	15.00%		12.00%
Investment, Interest Rate, Paid in Cash	4.96%		4.51%
Investment, Interest Rate, Paid in Kind	15.00%		12.00%
Investment, Acquisition Date	Nov. 04, 2019		Nov. 04, 2019
Investment Maturity Date	May 12, 2023		May 12, 2023
Investment Owned, Balance, Principal Amount	$ 252		$ 243
Investment Owned, at Fair Value	$ 247		$ 239
Investment, Identifier [Axis]: Vice Group Holding Inc, Senior Secured Loans, One, Due 5/12/2023
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ViceGroupHoldingIncMember		mcip:ViceGroupHoldingIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Broadcasting & Subscription		Media: Broadcasting & Subscription
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	15.00%		12.00%
Investment, Interest Rate, Paid in Cash	4.92%		4.51%
Investment, Interest Rate, Paid in Kind	15.00%		12.00%
Investment, Acquisition Date	May 02, 2019		May 02, 2019
Investment Maturity Date	May 12, 2023		May 12, 2023
Investment Owned, Balance, Principal Amount	$ 1,311		$ 1,268
Investment Owned, at Fair Value	$ 1,288		$ 1,243
Investment, Identifier [Axis]: Vice Group Holding Inc, Senior Secured Loans, Three, Due 5/12/2023
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ViceGroupHoldingIncMember		mcip:ViceGroupHoldingIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Broadcasting & Subscription		Media: Broadcasting & Subscription
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	15.00%		12.00%
Investment, Interest Rate, Paid in Cash	4.92%		4.25%
Investment, Interest Rate, Paid in Kind	15.00%		12.00%
Investment, Acquisition Date	May 02, 2019		May 02, 2019
Investment Maturity Date	May 12, 2023		May 12, 2023
Investment Owned, Balance, Principal Amount	$ 155		$ 150
Investment Owned, at Fair Value	$ 152		$ 147
Investment, Identifier [Axis]: Vice Group Holding Inc, Senior Secured Loans, Two, Due 5/12/2023
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ViceGroupHoldingIncMember		mcip:ViceGroupHoldingIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Broadcasting & Subscription		Media: Broadcasting & Subscription
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	15.00%		12.00%
Investment, Interest Rate, Paid in Cash	4.92%		4.42%
Investment, Interest Rate, Paid in Kind	15.00%		12.00%
Investment, Acquisition Date	May 02, 2019		May 02, 2019
Investment Maturity Date	May 12, 2023		May 12, 2023
Investment Owned, Balance, Principal Amount	$ 411		$ 398
Investment Owned, at Fair Value	$ 403		$ 390
Investment, Identifier [Axis]: Vice Group Holding Inc. (Delayed Draw), Senior Secured Loans, Due 5/12/2023
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:ViceGroupHoldingIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Broadcasting & Subscription
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment, Basis Spread, Variable Rate	12.00%
Investment, Interest Rate, Paid in Cash	5.16%
Investment, Interest Rate, Paid in Kind	12.00%
Investment, Acquisition Date	Jan. 27, 2023
Investment Maturity Date	May 12, 2023
Investment Owned, Balance, Principal Amount	$ 298
Investment Owned, at Fair Value	$ 286
Investment, Identifier [Axis]: Volt Bidco, Inc, Equity Securities, Common stock
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:VoltBidcoIncMember		mcip:VoltBidcoIncMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Environmental Industries		Environmental Industries
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Acquisition Date	Aug. 11, 2021		Nov. 08, 2021
Investment Owned, at Fair Value	$ 1,090		$ 886
Investment, Identifier [Axis]: Volt Bidco, Inc, Senior Secured Loans, Due 8/11/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:VoltBidcoIncMember		mcip:VoltBidcoIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Environmental Industries		Environmental Industries
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		6.50%
Investment Interest Rate	11.90%		11.08%
Investment, Acquisition Date	Aug. 11, 2021		Aug. 11, 2021
Investment Maturity Date	Aug. 11, 2027		Aug. 11, 2027
Investment Owned, Balance, Principal Amount	$ 9,059		$ 9,059
Investment Owned, at Fair Value	$ 9,059		$ 9,048
Investment, Identifier [Axis]: Volt Bidco, Inc. (Delayed Draw), Senior Secured Loans, Due 8/11/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:VoltBidcoIncMember		mcip:VoltBidcoIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Environmental Industries		Environmental Industries
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		6.50%
Investment, Interest Rate, Paid in Kind	11.90%		11.08%
Investment, Acquisition Date	Aug. 11, 2021		Aug. 11, 2021
Investment Maturity Date	Aug. 11, 2027		Aug. 11, 2027
Investment Owned, Balance, Principal Amount	$ 1,614		$ 1,614
Investment Owned, at Fair Value	$ 1,164		$ 868
Investment, Identifier [Axis]: Volt Bidco, Inc. (Revolver), Senior Secured Loans, Due 8/11/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:VoltBidcoIncMember		mcip:VoltBidcoIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Environmental Industries		Environmental Industries
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		6.50%
Investment Interest Rate	11.90%		11.08%
Investment, Acquisition Date	Aug. 11, 2021		Aug. 11, 2021
Investment Maturity Date	Aug. 11, 2027		Aug. 11, 2027
Investment Owned, Balance, Principal Amount	$ 956		$ 956
Investment, Identifier [Axis]: W3 Monroe RE Debt LLC (Delayed Draw), Senior Secured Loans, Due 2/4/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:W3MonroeREDebtLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:FireFinanceMember
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment Interest Rate	10.00%
Investment, Acquisition Date	Mar. 31, 2023
Investment Maturity Date	Feb. 04, 2028
Investment Owned, Balance, Principal Amount	$ 40
Investment Owned, at Fair Value	$ 13
Investment, Identifier [Axis]: W3 Monroe RE Debt LLC, Senior Secured Loans, Due 2/4/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:W3MonroeREDebtLLCMember		mcip:W3MonroeREDebtLLCMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:FireFinanceMember		mcip:FireFinanceMember
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Interest Rate, Paid in Kind	10.00%		10.00%
Investment, Acquisition Date	Feb. 05, 2021		Feb. 05, 2021
Investment Maturity Date	Feb. 04, 2028		Feb. 04, 2028
Investment Owned, Balance, Principal Amount	$ 1,993		$ 1,944
Investment Owned, at Fair Value	$ 1,978		$ 1,944
Investment, Identifier [Axis]: Watchguard Technologies, Inc, Senior Secured Loans, Due 6/29/2029
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:WatchguardTechnologiesIncMember		mcip:UnanetIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	High Tech Industries Sector [Member]		High Tech Industries Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	5.25%		5.25%
Investment Interest Rate	10.11%		9.57%
Investment, Acquisition Date	Aug. 17, 2022		Aug. 17, 2022
Investment Maturity Date	Jun. 29, 2029		Jun. 29, 2029
Investment Owned, Balance, Principal Amount	$ 21,048		$ 21,101
Investment Owned, at Fair Value	$ 20,180		$ 20,225
Investment, Identifier [Axis]: WebPT, Inc, Senior Secured Loans, Due 1/18/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:WebptIncMember		mcip:WebptIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	11.74%		11.48%
Investment, Acquisition Date	Aug. 28, 2019		Aug. 28, 2019
Investment Maturity Date	Jan. 18, 2028		Jan. 18, 2028
Investment Owned, Balance, Principal Amount	$ 5,000		$ 5,000
Investment Owned, at Fair Value	$ 4,973		$ 4,980
Investment, Identifier [Axis]: WebPT, Inc. (Revolver), Senior Secured Loans, Due 1/18/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:WebptIncMember		mcip:WebptIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	11.66%		11.91%
Investment, Acquisition Date	Aug. 28, 2019		Aug. 28, 2019
Investment Maturity Date	Jan. 18, 2028		Jan. 18, 2028
Investment Owned, Balance, Principal Amount	$ 521		$ 521
Investment Owned, at Fair Value	$ 342		$ 201
Investment, Identifier [Axis]: Whistler Parent Holdings III, Inc, Senior Secured Loans, Due 6/2/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:WhistlerParentHoldingsIIIIncMember		mcip:WhistlerParentHoldingsIIIIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	11.58%		11.17%
Investment, Acquisition Date	Jun. 03, 2022		Jun. 03, 2022
Investment Maturity Date	Jun. 02, 2028		Jun. 02, 2028
Investment Owned, Balance, Principal Amount	$ 21,000		$ 21,000
Investment Owned, at Fair Value	$ 20,769		$ 20,801
Investment, Identifier [Axis]: Whistler Parent Holdings III, Inc. (Delayed Draw), Senior Secured Loans, Due 6/2/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:WhistlerParentHoldingsIIIIncMember		mcip:WhistlerParentHoldingsIIIIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	11.58%		11.17%
Investment, Acquisition Date	Jun. 03, 2022		Jun. 03, 2022
Investment Maturity Date	Jun. 02, 2028		Jun. 02, 2028
Investment Owned, Balance, Principal Amount	$ 6,563		$ 6,563
Investment Owned, at Fair Value	$ 260		$ 260
Investment, Identifier [Axis]: Whistler Parent Holdings III, Inc. (Revolver), Senior Secured Loans, Due 6/2/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:WhistlerParentHoldingsIIIIncMember		mcip:WhistlerParentHoldingsIIIIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Healthcare & Pharmaceuticals Sector [Member]		Healthcare & Pharmaceuticals Sector [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	11.58%		11.17%
Investment, Acquisition Date	Jun. 03, 2022		Jun. 03, 2022
Investment Maturity Date	Jun. 02, 2028		Jun. 02, 2028
Investment Owned, Balance, Principal Amount	$ 2,625		$ 2,625
Investment Owned, at Fair Value	$ 389		$ 390
Investment, Identifier [Axis]: Witkoff/ Monroe 700 J V L L C ( Delayed Draw), Junior Secured Loans, due 7/2/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]			mcip:WitkoffMonroe700JVLLCMember
Investment, Type [Extensible Enumeration]			Junior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]			FIRE: Real Estate
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment, Interest Rate, Paid in Kind			4.00%
Investment, Acquisition Date			Jul. 02, 2021
Investment Maturity Date			Jul. 02, 2026
Investment Owned, Balance, Principal Amount			$ 9,373
Investment Owned, at Fair Value			$ 8,404
Investment, Identifier [Axis]: Witkoff/Monroe 700 JV LLC, Delayed Draw, Junior Secured Loans, Due 7/2/2026
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:WitkoffMonroe700JVLLCMember
Investment, Type [Extensible Enumeration]	Junior Loans [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	Non-US [Member]
Investment, Interest Rate, Paid in Cash	8.00%
Investment, Interest Rate, Paid in Kind	4.00%
Investment, Acquisition Date	Jul. 02, 2021
Investment Maturity Date	Jul. 02, 2026
Investment Owned, Balance, Principal Amount	$ 9,356
Investment Owned, at Fair Value	$ 9,089
Investment, Identifier [Axis]: Witkoff/Monroe 700 JV LLC, Equity Securities, Preferred units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:WitkoffMonroe700JVLLCMember		mcip:WitkoffMonroe700JVLLCMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	FIRE Real Estate Sector [Member]		FIRE: Real Estate
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Interest Rate, Paid in Cash	8.00%		8.00%
Investment, Interest Rate, Paid in Kind	4.00%		4.00%
Investment, Acquisition Date	Jul. 02, 2021		Jul. 02, 2021
Investment Owned, at Fair Value	$ 2,262		$ 1,462
Investment, Identifier [Axis]: XanEdu Publishing, Inc, Senior Secured Loans, One, Due 1/28/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:XanEduPublishingIncMember		mcip:XanEduPublishingIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.42%		10.94%
Investment, Acquisition Date	Jan. 28, 2020		Jan. 28, 2020
Investment Maturity Date	Jan. 28, 2025		Jan. 28, 2025
Investment Owned, Balance, Principal Amount	$ 6,016		$ 6,031
Investment Owned, at Fair Value	$ 6,037		$ 6,056
Investment, Identifier [Axis]: XanEdu Publishing, Inc, Senior Secured Loans, Two, Due 1/28/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:XanEduPublishingIncMember		mcip:XanEduPublishingIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.42%		10.94%
Investment, Acquisition Date	Aug. 31, 2022		Aug. 31, 2022
Investment Maturity Date	Jan. 28, 2025		Jan. 28, 2025
Investment Owned, Balance, Principal Amount	$ 2,391		$ 2,397
Investment Owned, at Fair Value	$ 2,399		$ 2,406
Investment, Identifier [Axis]: XanEdu Publishing, Inc. (Revolver), Senior Secured Loans, Due 1/28/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:XanEduPublishingIncMember		mcip:XanEduPublishingIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.42%		10.94%
Investment, Acquisition Date	Jan. 28, 2020		Jan. 28, 2020
Investment Maturity Date	Jan. 28, 2025		Jan. 28, 2025
Investment Owned, Balance, Principal Amount	$ 977		$ 977
Investment, Identifier [Axis]: XanEdu Publishing, Inc., Equity Securites, Class A units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:XanEduPublishingIncMember		mcip:XanEduPublishingIncMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Media: Advertising, Printing & Publishing		Media: Advertising, Printing & Publishing
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Interest Rate, Paid in Kind	8.00%		8.00%
Investment, Acquisition Date	Jan. 28, 2020		Jan. 28, 2020
Investment Owned, at Fair Value	$ 314		$ 294
Investment, Identifier [Axis]: YS WH4 LLC (Revolver), Senior Secured Loans, Due 11/20/2025
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:W3MonroeREDebtLLCMember		mcip:YSWH4LLCRevolverMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	mcip:FireFinanceMember		mcip:FireFinanceMember
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.00%		7.00%
Investment Interest Rate	11.93%		11.44%
Investment, Acquisition Date	Jul. 20, 2022		Jul. 20, 2022
Investment Maturity Date	Nov. 20, 2025		Nov. 20, 2025
Investment Owned, Balance, Principal Amount	$ 7,700		$ 7,700
Investment Owned, at Fair Value	$ 893		$ 2,604
Investment, Identifier [Axis]: ecMarket Inc. and Conexiom US Inc, Senior Secured Loans, One, Due 9/21/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:EcmarketInc.AndConexiomUsIncMember		mcip:EcmarketInc.AndConexiomUsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment, Interest Rate, Paid in Kind	11.91%		11.48%
Investment, Acquisition Date	Sep. 21, 2021		Sep. 21, 2021
Investment Maturity Date	Sep. 21, 2027		Sep. 21, 2027
Investment Owned, Balance, Principal Amount	$ 16,535		$ 16,027
Investment Owned, at Fair Value	$ 16,391		$ 15,847
Investment, Identifier [Axis]: ecMarket Inc. and Conexiom US Inc, Senior Secured Loans, Two, Due 9/21/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:EcmarketInc.AndConexiomUsIncMember		mcip:EcmarketInc.AndConexiomUsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment, Interest Rate, Paid in Kind	11.91%		11.48%
Investment, Acquisition Date	Sep. 21, 2021		Sep. 21, 2021
Investment Maturity Date	Sep. 21, 2027		Sep. 21, 2027
Investment Owned, Balance, Principal Amount	$ 1,291		$ 1,291
Investment Owned, at Fair Value	$ 1,280		$ 1,276
Investment, Identifier [Axis]: ecMarket Inc. and Conexiom US Inc. (Revolver), Senior Secured Loans, Due 9/21/2027
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:EcmarketInc.AndConexiomUsIncMember		mcip:EcmarketInc.AndConexiomUsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	LIBOR		LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	11.91%		11.48%
Investment, Acquisition Date	Sep. 21, 2021		Sep. 21, 2021
Investment Maturity Date	Sep. 21, 2027		Sep. 21, 2027
Investment Owned, Balance, Principal Amount	$ 2,067		$ 2,067
Investment, Identifier [Axis]: ecMarket Inc. and Conexiom US Inc., Equity Securites, Preferred shares)
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:EcmarketInc.AndConexiomUsIncMember		mcip:EcmarketInc.AndConexiomUsIncMember
Investment, Type [Extensible Enumeration]	Equity Securities [Member]		Equity Securities [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		Non-US [Member]
Investment, Acquisition Date	Sep. 21, 2021		Sep. 21, 2021
Investment Owned, at Fair Value	$ 728		$ 698
Investment, Identifier [Axis]: iCIMS, Inc, Senior Secured Loans, Due 8/18/2028
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	mcip:IcimsIncMember		mcip:IcimsIncMember
Investment, Type [Extensible Enumeration]	Senior Loans [Member]		Senior Loans [Member]
Investment, Industry Sector [Extensible Enumeration]	Services: Business		Services: Business
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment, Basis Spread, Variable Rate	7.25%		7.25%
Investment Interest Rate	12.05%		11.52%
Investment, Acquisition Date	Oct. 24, 2022		Oct. 24, 2022
Investment Maturity Date	Aug. 18, 2028		Aug. 18, 2028
Investment Owned, Balance, Principal Amount	$ 8,000		$ 8,000
Investment Owned, at Fair Value	8,000		7,860
Non-US [Member]
Schedule of Investments [Line Items]
Investment Owned, at Fair Value	60,203		59,706
Automotive
Schedule of Investments [Line Items]
Investment Owned, at Fair Value	38,482		38,843
Banking
Schedule of Investments [Line Items]
Investment Owned, at Fair Value	37,064		37,979
Beverage, Food & Tobacco
Schedule of Investments [Line Items]
Investment Owned, at Fair Value	16,212		16,439
Capital Equipment
Schedule of Investments [Line Items]
Investment Owned, at Fair Value	55,272		56,074
Construction & Building
Schedule of Investments [Line Items]
Investment Owned, at Fair Value	35,122		34,877
Environmental Industries
Schedule of Investments [Line Items]
Investment Owned, at Fair Value	35,801		31,457
Hotels, Gaming & Leisure
Schedule of Investments [Line Items]
Investment Owned, at Fair Value	2,484		2,331
Media: Advertising, Printing & Publishing
Schedule of Investments [Line Items]
Investment Owned, at Fair Value	137,498		129,362
Media: Broadcasting & Subscription
Schedule of Investments [Line Items]
Investment Owned, at Fair Value	2,376		2,019
Media: Diversified & Production
Schedule of Investments [Line Items]
Investment Owned, at Fair Value	44,527		46,348
Retail
Schedule of Investments [Line Items]
Investment Owned, at Fair Value	930
Telecommunications
Schedule of Investments [Line Items]
Investment Owned, at Fair Value	36,473		36,415
Transportation Sector [Member]
Schedule of Investments [Line Items]
Investment Owned, at Fair Value	98,663		97,153
Energy: Oil & Gas
Schedule of Investments [Line Items]
Investment Owned, at Fair Value	2,778		3,597
FIRE: Insurance
Schedule of Investments [Line Items]
Investment Owned, at Fair Value	16,019		9,641
Wholesale
Schedule of Investments [Line Items]
Investment Owned, at Fair Value	29,791		28,557
Aerospace & Defense
Schedule of Investments [Line Items]
Investment Owned, at Fair Value	20,974		21,049
Containers, Packaging & Glass
Schedule of Investments [Line Items]
Investment Owned, at Fair Value	11,885		11,675
Senior Loans [Member]
Schedule of Investments [Line Items]
Investment Owned, at Fair Value	1,320,148		1,250,788
Non-controlled/non-affiliate company investments
Schedule of Investments [Line Items]
Investment Owned, at Fair Value	1,502,021		1,429,808
Non-controlled/non-affiliate company investments | Senior Loans [Member]
Schedule of Investments [Line Items]
Investment Owned, Balance, Principal Amount	1,565,545		1,536,058
Investment Owned, at Fair Value	$ 1,306,816		$ 1,237,432
Non-controlled/non-affiliate company investments | Senior Loans [Member] | Automotive
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment Owned, Balance, Principal Amount	$ 43,150		$ 45,264
Investment Owned, at Fair Value	$ 38,070		$ 38,132
Non-controlled/non-affiliate company investments | Senior Loans [Member] | Banking
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment Owned, Balance, Principal Amount	$ 14,150		$ 14,131
Investment Owned, at Fair Value	$ 13,331		$ 13,525
Non-controlled/non-affiliate company investments | Senior Loans [Member] | Beverage, Food & Tobacco
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment Owned, Balance, Principal Amount	$ 18,040		$ 18,509
Investment Owned, at Fair Value	$ 16,203		$ 16,428
Non-controlled/non-affiliate company investments | Senior Loans [Member] | Capital Equipment
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment Owned, Balance, Principal Amount	$ 58,963		$ 59,165
Investment Owned, at Fair Value	$ 54,509		$ 55,262
Non-controlled/non-affiliate company investments | Senior Loans [Member] | Construction & Building
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment Owned, Balance, Principal Amount	$ 19,321		$ 19,356
Investment Owned, at Fair Value	$ 19,015		$ 19,060
Non-controlled/non-affiliate company investments | Senior Loans [Member] | Consumer Goods: Durable
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment Owned, Balance, Principal Amount	$ 20,669		$ 21,513
Investment Owned, at Fair Value	$ 16,972		$ 17,515
Non-controlled/non-affiliate company investments | Senior Loans [Member] | Consumer Sector, Non- Durable [ Member]
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment Owned, Balance, Principal Amount	$ 36,517		$ 36,592
Investment Owned, at Fair Value	$ 35,671		$ 32,843
Non-controlled/non-affiliate company investments | Senior Loans [Member] | Environmental Industries
Schedule of Investments [Line Items]
Investment, Variable Interest Rate, Type [Extensible Enumeration]			LIBOR
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment Owned, Balance, Principal Amount	$ 27,733		$ 29,137
Investment Owned, at Fair Value	$ 26,052		$ 21,845
Non-controlled/non-affiliate company investments | Senior Loans [Member] | FIRE: Finance
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment Owned, Balance, Principal Amount	$ 94,295		$ 94,350
Investment Owned, at Fair Value	$ 68,783		$ 66,563
Non-controlled/non-affiliate company investments | Senior Loans [Member] | FIRE: Real Estate
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment Owned, Balance, Principal Amount	$ 50,468		$ 47,873
Investment Owned, at Fair Value	$ 46,081		$ 38,651
Non-controlled/non-affiliate company investments | Senior Loans [Member] | Healthcare & Pharmaceuticals
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]			Non-controlled/non-affiliate company investments
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment Owned, Balance, Principal Amount	$ 266,253		$ 251,080
Investment Owned, at Fair Value	$ 203,863		$ 187,117
Non-controlled/non-affiliate company investments | Senior Loans [Member] | High Tech Industries
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment Owned, Balance, Principal Amount	$ 212,422		$ 206,819
Investment Owned, at Fair Value	$ 183,128		$ 177,308
Non-controlled/non-affiliate company investments | Senior Loans [Member] | Hotels, Gaming & Leisure
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment Owned, Balance, Principal Amount	$ 2,466		$ 2,654
Investment Owned, at Fair Value	$ 2,399		$ 2,238
Non-controlled/non-affiliate company investments | Senior Loans [Member] | Media: Advertising, Printing & Publishing
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment Owned, Balance, Principal Amount	$ 131,431		$ 124,608
Investment Owned, at Fair Value	$ 117,801		$ 109,609
Non-controlled/non-affiliate company investments | Senior Loans [Member] | Media: Broadcasting & Subscription
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment Owned, Balance, Principal Amount	$ 2,427		$ 2,059
Investment Owned, at Fair Value	$ 2,376		2,019
Non-controlled/non-affiliate company investments | Senior Loans [Member] | Media: Diversified & Production
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment Owned, Balance, Principal Amount	$ 53,531		57,174
Investment Owned, at Fair Value	$ 44,420		$ 46,241
Non-controlled/non-affiliate company investments | Senior Loans [Member] | Retail
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US
Investment Owned, Balance, Principal Amount	$ 1,000
Investment Owned, at Fair Value	$ 930
Non-controlled/non-affiliate company investments | Senior Loans [Member] | Services: Business
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment Owned, Balance, Principal Amount	$ 186,383		$ 177,791
Investment Owned, at Fair Value	152,359		$ 143,679
Non-controlled/non-affiliate company investments | Senior Loans [Member] | Services: Consumer
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment Owned, Balance, Principal Amount	107,508		$ 107,701
Investment Owned, at Fair Value	81,715		74,580
Non-controlled/non-affiliate company investments | Senior Loans [Member] | Telecommunications
Schedule of Investments [Line Items]
Investment Owned, Balance, Principal Amount	37,495		37,861
Investment Owned, at Fair Value	33,337		$ 33,061
Non-controlled/non-affiliate company investments | Senior Loans [Member] | Transportation Sector [Member]
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]			country:US
Investment Owned, Balance, Principal Amount	103,993		$ 104,131
Investment Owned, at Fair Value	$ 83,683		$ 82,356
Non-controlled/non-affiliate company investments | Senior Loans [Member] | Wholesale
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment Owned, Balance, Principal Amount	$ 29,607		$ 29,614
Investment Owned, at Fair Value	$ 28,103		$ 27,057
Non-controlled/non-affiliate company investments | Senior Loans [Member] | Aerospace & Defense
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment Owned, Balance, Principal Amount	$ 8,649		$ 8,673
Investment Owned, at Fair Value	$ 7,941		$ 8,036
Non-controlled/non-affiliate company investments | Senior Loans [Member] | Containers, Packaging & Glass
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	country:US		country:US
Investment Owned, Balance, Principal Amount	$ 11,895		$ 11,925
Investment Owned, at Fair Value	$ 11,885		$ 11,675