NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details)	3 Months Ended		6 Months Ended		12 Months Ended											162 Months Ended
	Jun. 30, 2025 USD ($) shares	Mar. 31, 2025 USD ($) shares	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2024 USD ($) shares	Dec. 31, 2023 USD ($) 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 ($) shares	Jun. 30, 2025 USD ($) shares
NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES
Issuance of common stock, net of offering costs (shares) | shares	278,945	656,085			3,355,476	4,458,873	149,174	31,592	354,257	3,177,936	7,931	3,465,922	380,936	63,998	12,035,023	28,416,148
Gross proceeds	$ 3,896,384	$ 9,256,982			$ 46,494,756	$ 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	$ 411,669,739
Payments of offering expenses and underwriting fees																12,570,043
Offering expenses reimbursements																672,917
Proceeds from the issuance of common stock			$ 13,153,366	$ 25,777,185												399,772,613
Credit facility payable	$ 160,622,440		$ 160,622,440		172,314,315											$ 160,622,440
Asset coverage ratio	211		211													211
Cash balance	$ 126,471		$ 126,471													$ 126,471
Cash held in foreign currency	974		974													974
Cash held in foreign currency at acquisition cost			974
Cash equivalents and carried at cost	39,865,219		39,865,219													39,865,219
Deferred offering costs	109,059		$ 109,059													109,059
SBA-guaranteed Debentures
NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES
Debt securities maturity			10 years
Level 3 | SBA-guaranteed Debentures
NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES
Estimated fair values	295,382,752		$ 295,382,752													295,382,752
Level 2 | 2026 Notes
NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES
Estimated fair values	170,574,323		170,574,323													170,574,323
SBIC Subsidiaries | SBA-guaranteed Debentures
NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES
Maximum borrowing capacity	350,000,000		350,000,000													350,000,000
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	133,750,000		133,750,000		150,000,000											133,750,000
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