FINANCIAL HIGHLIGHTS (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($) $ / shares shares	Sep. 30, 2022 USD ($) $ / shares shares	Sep. 30, 2023 USD ($) $ / shares shares	Sep. 30, 2022 USD ($) $ / shares shares	Dec. 31, 2022 USD ($)
Per Share Data:(1)
Net asset value at beginning of period			$ 14.02	$ 14.61
Net investment income			1.42	0.97
Change in unrealized depreciation on investments			(1.14)	(0.66)
Net realized gain			0.01	0.24
Provision for taxes on net unrealized appreciation on investments			(0.01)	(0.01)
Total from operations			0.28	0.54
Sales load			(0.04)
Offering costs			(0.01)	(0.01)
Net investment income			(1.22)	(0.96)
Accretive effect of stock offerings (issuing shares above net asset value per share)			0.10
Other(6)			0.06
Net asset value at end of period	$ 13.19	$ 14.18	13.19	14.18
Per share market value at end of period			$ 14.07	$ 11.93
Total return based on market value(2)			10.40%	(2.30%)
Weighted Average Shares of Common Stock Outstanding Basic | shares	22,824,221	19,545,935	21,289,880	19,535,708
Weighted Average Shares of Common Stock Outstanding Diluted | shares	22,824,221	19,545,935	21,289,880	19,535,708
Ratio/Supplemental Data:(1)
Net assets at end of period | $	$ 318,125,780	$ 277,177,984	$ 318,125,780	$ 277,177,984	$ 275,776,613
Weighted average net assets | $	$ 294,999,242	$ 283,289,645	$ 294,999,242	$ 283,289,645
Annualized ratio of gross operating expenses to net assets(5)	21.59	15.57	21.59	15.57
Annualized ratio of interest expense and other fees to net assets	10.89	7.96	10.89	7.96
Annualized ratio of net investment income to net assets(5)			13.73%	8.91%
Portfolio turnover(3)	12.11	8.92	12.11	8.92
Notes payable | $	$ 98,883,814	$ 100,000,000	$ 98,883,814	$ 100,000,000	$ 98,549,692
Credit Facility payable | $	162,306,499	199,033,419	162,306,499	199,033,419
SBA-guaranteed debentures | $	$ 325,000,000	$ 306,000,000	$ 325,000,000	$ 306,000,000
Asset coverage ratio(4)	2.21	1.93	2.21	1.93
Income tax (provision) benefit on net unrealized appreciation (depreciation) in taxable subsidiaries | $			$ (144,425)	$ (151,278)
Percentage impact of tax on net unrealized appreciation (depreciation) to net assets			(0.07%)	(0.07%)