EQUITY OFFERINGS AND RELATED EXPENSES - Stock Issued (Details) - USD ($)	3 Months Ended	12 Months Ended												147 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2024
EQUITY OFFERINGS AND RELATED EXPENSES
Number of Shares		4,458,873	149,174	31,592	354,257	3,177,936	7,931	3,465,922			380,936	63,998	12,035,023	24,125,642
Gross Proceeds		$ 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	$ 352,021,617
Underwriting fees		943,248	31,066	6,744	5,680	1,015,127		1,358,880			75,510		4,959,720	8,395,975
Offering Expenses		247,701	530,842	53,327	84,592	559,261		307,021			29,904		835,500	2,648,148
Fees covered by Advisor		477,088	87,605	4,255	66,423	37,546								672,917
Net Proceeds		$ 62,157,488	$ 1,596,632	$ 393,699	$ 4,999,994	$ 44,326,153	$ 93,737	$ 47,075,505			$ 5,380,366	$ 899,964	$ 174,726,873	$ 341,650,411
Average Offering Price		$ 14.10	$ 13.88	$ 14.23	$ 14.40	$ 14.43	$ 11.85	$ 14.06			$ 14.47	$ 14.06	$ 14.90
Increase (decrease) in gross proceeds from issuance of common stock due to share redemptions					$ (94)	$ 757	$ (1,051)	$ (142)	$ (31)	$ (29)
Common shares issued under the DRIP	$ 0	$ 0	$ 0	$ 0	$ 228,943	$ 0	$ 94,788	$ 0	$ 0	$ 0	$ 390,505	$ 938,385	$ 113,000
Reclassification adjustment to additional paid in capital	$ 5,707,371	$ 5,707,371