FINANCIAL HIGHLIGHTS (Details)	3 Months Ended
	Mar. 31, 2023 USD ($) $ / shares shares	Mar. 31, 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	0.46	0.28
Change in unrealized depreciation on investments	(0.21)	(0.19)
Net realized gain		0.18
Provision for taxes on unrealized appreciation on investments	(0.01)
Total from operations	0.24	0.27
Sales load	(0.01)
Offering costs		(0.01)
Net investment income	(0.40)	(0.28)
Accretive effect of stock offerings (issuing shares above net asset value per share)	0.01
Other	0.01
Net asset value at end of period	13.87	14.59
Per share market value at end of period	$ 14.09	$ 13.89
Total return based on market value(2)	8.20%	7.90%
Weighted Average Shares of Common Stock Outstanding Basic | shares	19,779,988	19,517,761
Weighted Average Shares of Common Stock Outstanding Diluted | shares	19,779,988	19,517,761
Ratio/Supplemental Data:(1)
Net assets at end of period | $	$ 280,852,045	$ 285,036,401	$ 280,852,045
Weighted average net assets | $	$ 277,747,062	$ 285,110,402
Annualized ratio of gross operating expenses to net assets(5)	21.94	14.20
Annualized ratio of interest expense and other fees to net assets	11.52	6.96
Annualized ratio of net investment income to net assets(5)	13.24%	7.84%
Portfolio turnover(3)	2.77	1.25
Notes payable | $	$ 98,659,842	$ 100,000,000	98,549,692
Credit Facility payable | $	198,277,831	205,488,800
SBA-guaranteed debentures | $	$ 313,600,000	$ 270,000,000
Asset coverage ratio(4)	1.94	1.93
Income tax (provision) benefit on net unrealized appreciation (depreciation) in taxable subsidiaries | $	$ (78,760)	$ (21,157)
Percentage Impact of tax on net unrealized appreciation (depreciation) to net assets	0.12%	0.03%
Deferred offering costs | $	$ 3,800		$ 1,100