STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of (decrease) increase in net assets resulting from operations to net cash (used in) provided by operating activities:
Net (decrease) increase in net assets resulting from operations	$ (1,128)	$ 2,588	$ (12,292)
Adjustments to reconcile net (decrease) increase in net assets resulting from operations to net cash (used in) provided by operating activities:
Affiliate investments	0	0	(21,287)
Non-affiliate investments -related party	0	0	2,486
Non-affiliate investments	0	0	266
Escrow receivable	0	(429)	0
Temporary cash investments	(1)	0	(8)
Control investments	(2,500)	(5,650)	1,561
Affiliate investments	0	0	26,150
Non-affiliate investments -related party	0	0	(1,741)
Share-based incentive compensation	0	0	80
Purchase of portfolio securities	(150)	(350)	(561)
Dividends exchanged for portfolio securities	0	0	(156)
Net proceeds from dispositions of portfolio securities		429	26,791
(Purchases) sales of temporary cash investments, net	(3,497)	21,500	4,997
Changes in operating assets and liabilities:
Accounts receivable from affiliates	0	0	350
Accrued interest and dividend receivable	0	0	489
Accrued esrow receivable	0	3,413	(3,413)
Other assets	(6)	(195)	(40)
Accounts payable and accrued liabilities	(410)	(206)	(23)
Accounts payable to related parties	(12)	11	963
Net cash provided by (used in) operating activities	(7,704)	21,111	24,614
Cash Flows From Financing Activities
Borrowings under margin account	16,997	2,500	104,001
Repayments under margin account	(13,499)	(24,000)	(108,992)
Net cash provided by (used in) financing activities	3,498	(21,500)	(4,991)
Net (decrease) increase in cash and cash equivalents	(4,206)	(390)	19,623
Cash and cash equivalents and restricted cash at beginning of period	23,490	23,879	4,256
Cash and cash equivalents and restricted cash at end of period	19,284	23,490	23,879
Non-cash operating and financing activities
Accrued interest or dividends exchanged for portfolio securities - related party	0	0	489
Supplemental Disclosures of Cash Flow Information
Cash paid for interest	4	4	14
Cash paid for income taxes	$ 53	$ 25	$ 12