Consolidated Statements of Operations - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
From non-controlled non-affiliated investments:
Interest income		$ 101,751	$ 81,371	$ 66,078
Paid-in-kind interest		1,564	1,881	2,169
Dividend income		127	1,919	323
Other income		540	791	1,060
From non-controlled affiliated investments:
Interest income		1,625	1,170	1,420
Paid-in-kind interest		2,106	1,235	1,456
Dividend income		5,169	2,414	2,407
Other income			3
From controlled investments:
Interest income		745	2
Paid-in-kind interest		732
Dividend income		2,358	3,200	2,200
Total investment income		116,717	93,986	77,113
Expenses:
Interest and other debt financing costs		31,880	19,766	15,485
Management fees		16,344	14,118	11,438
Income based incentive fees		11,214	9,849	8,639
Capital gains based incentive fees		(6,324)	6,324
Professional fees		1,302	1,769	1,460
Directors’ fees		524	475	437
Other general and administrative expenses		2,660	2,628	2,544
Total expenses		57,600	54,929	40,003
Management fees waiver		(229)	(3,302)	(4,672)
Income based incentive fees waiver		(538)	(7,517)	(8,639)
Net expenses		56,833	44,110	26,692
Net investment income before taxes		59,884	49,876	50,421
(Benefit) provision for income and excise taxes		155	2,250	541
Net investment income		59,729	47,626	49,880
Net realized gain (loss) on:
Non-controlled non-affiliated investments		1,157	3,687	(10,889)
Non-controlled affiliated investments		7,098	28,810	(4,314)
Controlled investments		(3,301)
Foreign currency transactions		(33)	311	(83)
Foreign currency forward contracts		24	(193)
Net change in unrealized appreciation (depreciation) on:
Non-controlled non-affiliated investments and foreign currency translation		(43,818)	12,535	7,437
Non-controlled affiliated investments		(9,419)	(10,464)	19,686
Controlled investments		(1,600)	602	(1,707)
Foreign currency forward contracts		6,513	2,116	(1,324)
Net realized and unrealized gains (losses) on investments		(43,379)	37,404	8,806
Realized loss on asset acquisition	[1]			3,825
Net realized and unrealized gains losses on investments and asset acquisition, Total		(43,379)	37,404	4,981
Benefit (provision) for taxes on realized gain on investments		(911)	(1,177)	46
Benefit (provision) for taxes on unrealized appreciation (depreciation) on investments		105	(220)	(235)
Net increase (decrease) in net assets resulting from operations		$ 15,544	$ 83,633	$ 54,672
Per common share data:
Net increase (decrease) in net assets resulting from operations per share (basic and diluted):		$ 0.50	$ 2.94	$ 1.98
Net investment income per share (basic):		1.93	1.67	1.80
Net investment income per share (diluted):		$ 1.93	$ 1.67	$ 1.80
Weighted average shares outstanding (basic):		30,887,360	28,477,771	27,681,757
Weighted average shares outstanding (diluted):		30,887,360	28,477,771	27,681,757

[1] After the close of business on January 31, 2020, in connection with the Alcentra Acquisition (as defined in Note 1 and further discussed in Note 14), the Company acquired net assets of $114,431 which included $195,682 of investments, $3,409 cash and cash equivalents and $1,398 of other assets, net of $86,058 of assumed liabilities, for the total cash and stock consideration of $118,256, inclusive of $7,250 of asset acquisition costs.