NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details)	12 Months Ended												163 Months Ended
	Dec. 31, 2025 USD ($) shares	Dec. 31, 2024 USD ($) 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	Dec. 31, 2025 USD ($) shares	Dec. 31, 2016 USD ($)
NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES
Issuance of common stock, net of offering costs (shares) | shares	1,466,136	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	28,947,254
Gross proceeds	$ 20,588,960	$ 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	$ 419,105,333
Payments of offering expenses and underwriting fees													13,093,525
Offering expenses reimbursements													672,917
Proceeds from the issuance of common stock	20,588,960	46,494,756	63,348,436										406,684,725
Credit facility payable	$ 233,167,360	172,314,315											$ 233,167,360
Asset coverage ratio	203												203
Cash balance	$ 19,352												$ 19,352
Cash held in foreign currency	353												353
Cash held in foreign currency at acquisition cost	353
Cash equivalents and carried at cost	25,030,804												25,030,804
Deferred offering costs	$ 0												0	$ 261,761
SBA-guaranteed Debentures
NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES
Debt securities maturity	10 years
Estimated fair values	$ 290,359,247												290,359,247
Level 3 | SBA-guaranteed Debentures
NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES
Estimated fair values	290,359,247												290,359,247
Level 2 | SBA-guaranteed Debentures
NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES
Estimated fair values	126,000,000												126,000,000
SBIC Subsidiaries | SBA-guaranteed Debentures
NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES
Maximum borrowing capacity	350,000,000												350,000,000
SBIC I subsidiary | SBA-guaranteed Debentures
NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES
Maximum borrowing capacity	150,000,000												150,000,000
Regulatory capital	75,000,000	75,000,000											75,000,000
Credit facility payable	124,000,000	150,000,000											124,000,000
SBIC II Subsidiary | SBA-guaranteed Debentures
NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES
Maximum borrowing capacity	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