FINANCIAL HIGHLIGHTS (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2025 USD ($) $ / shares shares	Jun. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2025 USD ($) $ / shares shares	Jun. 30, 2024 USD ($) $ / shares shares	Dec. 31, 2024 USD ($)
Per Share Data:
Net asset value at beginning of period			$ 13.46	$ 13.26
Net investment income			0.69	0.9
Change in unrealized appreciation on investments			0.09	0.73
Net realized loss			(0.24)	(0.75)
Benefit for taxes on net unrealized depreciation on investments				0.01
Total from operations			0.54	0.89
Sales load			(0.01)	(0.02)
Offering costs			(0.01)	(0.01)
Net investment income			(0.8)	(0.81)
Accretive effect of stock offerings (issuing shares above net asset value per share)			0.01	0.02
Other			0.02	0.03
Net asset value at end of period	$ 13.21	$ 13.36	13.21	13.36
Per share market value at end of period			$ 13.94	$ 13.73
Total return based on market value			7.32%	12.07%
Weighted average common shares, Basic (in shares) | shares	28,412,849	24,733,966	28,009,969	24,429,804
Weighted average common shares, Diluted (in shares) | shares	28,412,849	24,733,966	28,009,969	24,429,804
Ratio/Supplemental Data:
Net assets at end of period | $	$ 375,370,890	$ 347,185,493	$ 375,370,890	$ 347,185,493	$ 369,921,940
Weighted average net assets | $	$ 374,041,889	$ 325,868,428	$ 374,041,889	$ 325,868,428
Annualized ratio of gross operating expenses to net assets	18.04	19.9	18.04	19.9
Annualized ratio of net operating expenses to net assets	16.87	18.77	16.87	18.77
Annualized ratio of interest expense and other fees to net assets	9.13	9.78	9.13	9.78
Annualized ratio of net investment income before fee waiver to net assets	9.26	12.43	9.26	12.43
Annualized ratio of net investment income to net assets			10.43%	13.56%
Portfolio turnover	4.77	16.31	4.77	16.31
Notes payable | $	$ 175,000,000	$ 100,000,000	$ 175,000,000	$ 100,000,000
Credit Facility payable | $	163,059,680	169,438,912	163,059,680	169,438,912
SBA-guaranteed debentures | $	$ 308,750,000	$ 325,000,000	$ 308,750,000	$ 325,000,000
Asset coverage ratio	2.11	2.29	2.11	2.29
Income tax benefit (provision) on net unrealized depreciation (appreciation) in taxable subsidiaries | $			$ 0	$ 188,893
impact of the tax benefit (provision) on net unrealized depreciation (appreciation) to weighted average net assets			0.00%	0.0012%