NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details)	3 Months Ended	6 Months Ended		12 Months Ended										150 Months Ended
	Jun. 30, 2024 USD ($) shares	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($) shares	Dec. 31, 2017 USD ($) shares	Dec. 31, 2014 USD ($) shares	Dec. 31, 2013 USD ($) shares	Dec. 31, 2012 USD ($) shares	Jun. 30, 2024 USD ($) shares
NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES
Issuance of common stock, net of offering costs (shares) | shares	1,855,356			4,458,873	149,174	31,592	354,257	3,177,936	7,931	3,465,922	380,936	63,998	12,035,023	25,980,998
Gross Proceeds	$ 25,777,185			$ 62,871,349	$ 2,070,935	$ 449,515	$ 5,023,843	$ 45,862,995	$ 93,737	$ 48,741,406	$ 5,485,780	$ 899,964	$ 180,522,093	$ 377,798,802
Payments of offering expenses and underwriting fees														11,571,432
Offering expenses reimbursements														672,917
Proceeds from the issuance of common stock		$ 25,777,185	$ 41,448,945											366,900,287
Credit Facility payable	$ 166,396,015	$ 166,396,015		156,564,776										$ 166,396,015
Asset coverage ratio	229	229												229
Cash balance	$ 251,905	$ 251,905												$ 251,905
Cash held in foreign currency	978	978												978
Cash held in foreign currency at acquisition cost		978
Cash exceeding the insured amount	1,905	1,905												1,905
Cash equivalents and carried at cost	35,615,876	35,615,876												35,615,876
SBA-guaranteed Debentures
NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES
Estimated fair values	305,795,000	305,795,000												305,795,000
2026 Notes
NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES
Estimated fair values	94,450,000	94,450,000												94,450,000
SBIC Subsidiary | SBA-guaranteed Debentures
NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES
Maximum borrowing capacity	150,000,000	150,000,000												150,000,000
Regulatory capital	75,000,000	75,000,000		75,000,000										75,000,000
Credit Facility payable	150,000,000	150,000,000		150,000,000										150,000,000
SBIC II Subsidiary | SBA-guaranteed Debentures
NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES
Maximum borrowing capacity	175,000,000	175,000,000												175,000,000
Regulatory capital	87,500,000	87,500,000		87,500,000										87,500,000
Credit Facility payable	$ 175,000,000	$ 175,000,000		$ 175,000,000										$ 175,000,000