Statements of Assets and Liabilities - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Assets
Investments at fair value	$ 570,489,084	$ 552,563,994
Cash and cash equivalents	9,531,190	12,750,121
Interest, dividends and fees receivable	5,515,446	3,671,722
Due from broker	1,946,507	0
Deferred debt issuance costs	1,055,117	1,511,418
Receivable for investments sold	12,096	690,550
Prepaid expenses and other assets	510,706	788,469
Total assets	589,060,146	571,976,274
Liabilities
Debt (net of deferred issuance costs of $996,839 and $425,272)	253,003,161	196,875,330
Dividends payable	7,257,191	7,392,972
Income incentive fees payable (see Note 3)	3,403,349	170,002
Accrued capital gains incentive fees (see Note 3)	0	1,544,569
Management fees payable	2,186,540	2,122,519
Interest Rate Swap at fair value	1,332,299	0
Interest and debt related payables	738,719	601,379
Payable for investments purchased	600,391	11,679,798
Accrued administrative expenses	397,299	384,225
Accrued expenses and other liabilities	1,618,844	1,553,507
Total liabilities	270,537,793	222,324,301
Commitments and contingencies (see Note 9)
Net assets
Common stock, par value $.001 per share, 200,000,000 common shares authorized, 84,481,797 and 84,478,251 issued and 72,571,907 and 73,876,987 outstanding	84,482	84,478
Paid-in capital in excess of par	850,199,351	852,360,178
Distributable earnings (losses)	(458,387,778)	(434,303,297)
Treasury stock at cost, 11,909,890 and 10,601,264 shares held	(73,373,702)	(68,489,386)
Total net assets	318,522,353	349,651,973
Total liabilities and net assets	$ 589,060,146	$ 571,976,274
Net assets per share	$ 4.39	$ 4.73
Non-Controlled, Non-Affiliated Investments
Assets
Investments at fair value	$ 551,686,646	$ 526,504,945
Non-Controlled, Affiliated Investments
Assets
Investments at fair value	3,574,438	4,131,978
Controlled Investments
Assets
Investments at fair value	$ 15,228,000	$ 21,927,071