NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details)	3 Months Ended		12 Months Ended									135 Months Ended
	Mar. 31, 2023 USD ($) shares	Mar. 31, 2022 USD ($)	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 ($) shares	Mar. 31, 2023 USD ($) shares
Nature of Operation And Significant Accounting Policies [Line Items]
Issuance of common stock, net of offering costs (shares) | shares	581,614		149,174	31,592	354,257	3,177,936	7,931	3,465,922	380,936	63,998	12,035,023	20,248,383
Gross Proceeds	$ 8,418,160		$ 2,070,935	$ 449,515	$ 5,023,843	$ 45,862,995	$ 93,737	$ 48,741,406	$ 5,485,780	$ 899,964	$ 180,522,093	$ 297,568,428
Proceeds for offering expenses and sales load fees												10,049,732
Offering expenses reimbursements												264,796
Proceeds from the issuance of common stock	8,487,127	$ 221,176										287,783,492
Credit Facility payable	$ 196,906,509		197,685,281									$ 196,906,509
Asset coverage ratio	194											194
Cash equivalents and carried at cost	$ 17,758,446											$ 17,758,446
Cash held in foreign currency	294											294
Cash held in foreign currency at acquisition cost	292
SBIC Subsidiary | SBA-guaranteed Debentures
Nature of Operation And Significant Accounting Policies [Line Items]
Maximum borrowing capacity	150,000,000											150,000,000
Regulatory capital	75,000,000		75,000,000									75,000,000
Credit Facility payable	150,000,000		150,000,000									150,000,000
SBIC II Subsidiary | SBA-guaranteed Debentures
Nature of Operation And Significant Accounting Policies [Line Items]
Maximum borrowing capacity	175,000,000											175,000,000
Regulatory capital	87,500,000		$ 87,500,000									87,500,000
Credit Facility payable	$ 163,600,000											$ 163,600,000