Consolidated Statements of Operations - USD ($)		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Investment income
Total investment income		$ 57,935,794	$ 46,245,020	$ 67,115,500
Operating expenses
Interest and other debt expenses		13,140,402	11,620,899	15,584,214
Management fees		8,311,686	7,784,188	10,799,832
Incentive fees on income		3,422,362	249,385	6,304,333
Incentive fees on capital gains(1)	[1]	(1,544,569)	1,544,569	0
Administrative expenses		1,407,775	1,354,283	1,457,979
Professional fees		836,788	1,100,008	1,964,252
Insurance expense		747,428	809,356	650,432
Director fees		613,750	622,500	652,250
Investment advisor expenses		103,276	350,000	350,000
Other operating expenses		1,525,774	1,011,273	1,433,054
Total expenses, before incentive fee waiver		28,564,672	26,446,461	39,196,346
Incentive fee waiver (see Note 3)		0	(79,383)	(6,304,333)
Total expenses, net of incentive fee waiver		28,564,672	26,367,078	32,892,013
Net investment income	[1]	29,371,122	19,877,942	34,223,487
Net realized gain (loss):
Net realized gain (loss)		1,196,573	(19,077,032)	(115,988,233)
Net change in unrealized appreciation (depreciation):
Net change in unrealized appreciation (depreciation) on Interest Rate Swap		(1,332,299)	0	0
Net change in unrealized appreciation (depreciation) on Foreign currency translation		0	(285,360)	135,427
Net change in unrealized appreciation (depreciation)		(27,080,719)	65,687,318	(22,087,857)
Net realized and unrealized gain (loss)		(25,884,146)	46,610,286	(138,076,090)
Net increase (decrease) in net assets resulting from operations		$ 3,486,976	$ 66,488,228	$ (103,852,603)
Net investment income per share-basic	[1]	$ 0.40	$ 0.27	$ 0.49
Earnings (Loss) per share - basic	[1]	$ 0.05	$ 0.90	$ (1.49)
Weighted average shares outstanding—basic		73,314,124	74,153,145	69,801,849
Net investment income per share-diluted	[1],[2]	$ 0.40	$ 0.27	$ 0.49
Earnings (Loss) per share - diluted	[1],[2]	$ 0.05	$ 0.83	$ (1.49)
Weighted average shares outstanding—diluted		81,042,705	91,146,882	86,795,585
Non-Controlled, Non-Affiliated Investments
Investment income
Interest income (excluding PIK):		$ 54,387,478	$ 40,366,030	$ 31,426,192
PIK interest income		1,138,311	2,092,736	5,026,084
PIK dividend income		319,524	15,177	0
Other income		1,633,795	839,678	620,705
Net realized gain (loss):
Net realized gain (loss)		1,196,573	21,408,577	(12,941,524)
Net change in unrealized appreciation (depreciation):
Net change in unrealized appreciation (depreciation)		(23,845,171)	20,125,055	(2,123,600)
Non-Controlled, Affiliated Investments
Investment income
Interest income (excluding PIK):		0	11,867	474,862
PIK interest income		456,686	481,800	461,367
Dividend income (excluding PIK)		0	71,500	0
Other income		0	0	(3,055)
Net realized gain (loss):
Net realized gain (loss)		0	(7,989,591)	(43,851,965)
Net change in unrealized appreciation (depreciation):
Net change in unrealized appreciation (depreciation)		620,438	6,932,957	35,523,356
Controlled Investments
Investment income
Interest income (excluding PIK):		0	718,571	19,794,470
PIK interest income		0	0	1,053,664
Dividend income (excluding PIK)		0	1,647,661	8,190,499
Other income		0	0	70,712
Net realized gain (loss):
Net realized gain (loss)		0	(32,496,018)	(59,194,744)
Net change in unrealized appreciation (depreciation):
Net change in unrealized appreciation (depreciation)		$ (2,523,687)	$ 38,914,666	$ (55,623,040)

[1] Net investment income and per share amounts displayed above are net of the accrual (reversal) for incentive fees on capital gains which is reflected on a hypothetical liquidation basis in accordance with GAAP for the years ended December 31, 2022 and 2021 (see Note 3).

[2] For the years ended December 31, 2022 and 2020, the impact of the hypothetical conversion of the 2022 Convertible Notes was antidilutive (see Note 8).