EQUITY OFFERINGS AND RELATED EXPENSES - Stock Issued (Details) - USD ($)	3 Months Ended		12 Months Ended											135 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	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, 2023
EQUITY OFFERINGS AND RELATED EXPENSES
Issuance of common stock, net of offering costs (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
Underwriting fees	126,303		31,066	6,744	5,680	1,015,127		1,358,880			75,510		4,959,720	7,579,030
Offering Expenses	70,255		530,842	53,327	84,592	559,261		307,021			29,904		835,500	2,470,702
Fees covered by Advisor	68,967		87,605	4,255	66,423	37,546								264,796
Net Proceeds	$ 8,290,569		$ 1,596,632	$ 393,699	$ 4,999,994	$ 44,326,153	$ 93,737	$ 47,075,505			$ 5,380,366	$ 899,964	$ 174,726,873	$ 287,783,492
Average Offering Price	$ 14.47		$ 13.88	$ 14.23	$ 14.40	$ 14.43	$ 11.85	$ 14.06			$ 14.47	$ 14.06	$ 14.90	$ 14.47
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	$ 4,358,536		$ 4,358,536