Organization	3 Months Ended
Mar. 31, 2023
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization	Note 1. Organization MidCap Financial Investment Corporation (the “Company,” “MFIC,” “we,” “us,” or “our”), a Maryland corporation incorporated on February 2, 2004, is a closed-end, externally managed, non-diversified management investment company that has elected to be treated as a business development company (“BDC”) under the Investment Company Act of 1940 (the “1940 Act”). In addition, for tax purposes we have elected to be treated as a regulated investment company (“RIC”) under Subchapter M of the Internal Revenue Code of 1986, as amended (the “Code”). We commenced operations on April 8, 2004 receiving net proceeds of $870,000 from our initial public offering by selling 62 million shares of common stock at a price of $15.00 per share (20.7 million shares at a price of $45.00 per share adjusted for the one-for-three reverse stock split). Since then, and through March 31, 2023, we have raised approximately $2,240,067 in net proceeds from additional offerings of common stock and repurchased common stock for $245,810. On August 1, 2022, the Company changed its name from "Apollo Investment Corporation" to "MidCap Financial Investment Corporation". Our common stock began to trade under the ticker “MFIC” on the NASDAQ Global Stock Market on August 12, 2022. On November 3, 2022, the Company's Board changed the Company’s fiscal year end from March 31 to December 31, effective December 31, 2022. Apollo Investment Management, L.P. (the “Investment Adviser” or “AIM”) is our investment adviser and an affiliate of Apollo Global Management, Inc. and its consolidated subsidiaries (“AGM”). The Investment Adviser, subject to the overall supervision of our Board of Directors, manages the day-to-day operations of and provides investment advisory services to the Company. Apollo Investment Administration, LLC (the “Administrator” or “AIA”), an affiliate of AGM, provides, among other things, administrative services and facilities for the Company. Furthermore, AIA provides on our behalf managerial assistance to those portfolio companies to which we are required to provide such assistance. Our investment objective is to generate current income and, to a lesser extent, long-term capital appreciation. We primarily invest in directly originated and privately negotiated first lien senior secured loans to privately held U.S. middle-market companies, which the Company generally defines as companies with less than $75 million in EBITDA, as may be adjusted for market disruptions, mergers and acquisitions-related charges and synergies, and other items. To a lesser extent, we may invest in other types of securities including, first lien unitranche, second lien senior secured, unsecured, subordinated, and mezzanine loans, and equities in both private and public middle market companies.

Organization

3 Months Ended

Mar. 31, 2023

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Note 1. Organization

MidCap Financial Investment Corporation (the “Company,” “MFIC,” “we,” “us,” or “our”), a Maryland corporation incorporated on February 2, 2004, is a closed-end, externally managed, non-diversified management investment company that has elected to be treated as a business development company (“BDC”) under the Investment Company Act of 1940 (the “1940 Act”). In addition, for tax purposes we have elected to be treated as a regulated investment company (“RIC”) under Subchapter M of the Internal Revenue Code of 1986, as amended (the “Code”). We commenced operations on April 8, 2004 receiving net proceeds of $870,000 from our initial public offering by selling 62 million shares of common stock at a price of $15.00 per share (20.7 million shares at a price of $45.00 per share adjusted for the one-for-three reverse stock split). Since then, and through March 31, 2023, we have raised approximately $2,240,067 in net proceeds from additional offerings of common stock and repurchased common stock for $245,810.

On August 1, 2022, the Company changed its name from "Apollo Investment Corporation" to "MidCap Financial Investment Corporation". Our common stock began to trade under the ticker “MFIC” on the NASDAQ Global Stock Market on August 12, 2022.

On November 3, 2022, the Company's Board changed the Company’s fiscal year end from March 31 to December 31, effective December 31, 2022.

Apollo Investment Management, L.P. (the “Investment Adviser” or “AIM”) is our investment adviser and an affiliate of Apollo Global Management, Inc. and its consolidated subsidiaries (“AGM”). The Investment Adviser, subject to the overall supervision of our Board of Directors, manages the day-to-day operations of and provides investment advisory services to the Company.

Apollo Investment Administration, LLC (the “Administrator” or “AIA”), an affiliate of AGM, provides, among other things, administrative services and facilities for the Company. Furthermore, AIA provides on our behalf managerial assistance to those portfolio companies to which we are required to provide such assistance.

Our investment objective is to generate current income and, to a lesser extent, long-term capital appreciation. We primarily invest in directly originated and privately negotiated first lien senior secured loans to privately held U.S. middle-market companies, which the Company generally defines as companies with less than $75 million in EBITDA, as may be adjusted for market disruptions, mergers and acquisitions-related charges and synergies, and other items. To a lesser extent, we may invest in other types of securities including, first lien unitranche, second lien senior secured, unsecured, subordinated, and mezzanine loans, and equities in both private and public middle market companies.