SELECTED PER SHARE DATA AND RATIOS - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SELECTED PER SHARE DATA AND RATIOS
Investment income	$ 0	$ 0	$ 0.02	$ 0.03	$ 0.04
Expenses	0.27	0.26	0.38	0.28	0.31
Net investment loss	(0.27)	0.26	0.36	0.25	0.27
Net realized gain (loss)	0.00	0.03	1.37	(0.20)	0
Net change in unrealized appreciation of portfolio securities	0.19	0.42	(2.05)	0.58	0.36
Net change in unrealized depreciation of portfolio securities - related party	0	0	0.13	0.03	(0.09)
Net increase (decrease) in net assets resulting from operations	(0.08)	0.19	0.91	0.16	0
Capital transactions:
Shares issued for portfolio securities	0	0	0.01	0.02	0.04
Decrease in net assets resulting from capital transactions	0	0	0.01	0.02	0.04
Net increase (decrease) in net assets	(0.08)	0.19	(0.90)	0.18	0.04
Net assets at beginning of period	2.69	2.50	3.40	3.22	3.18
Net assets at end of period, basic and diluted	$ 2.61	$ 2.69	$ 2.50	$ 3.40	$ 3.22
Weighted average number of shares outstanding during period	13,518	13,518	13,518	13,518	13,518
Market price per share:
Beginning of period	$ 2.38	$ 2.16	$ 1.82	$ 1.96	$ 2.40
End of period	$ 1.43	$ 2.38	$ 2.16	$ 1.82	$ 1.96
Selected information and ratios:
Ratio of expenses to average net assets	10.14%	9.77%	13.00%	8.36%	9.33%
Ratio of net investment loss to average net assets	(10.14%)	(9.77%)	12.20%	7.58%	8.22%
Ratio of net increase (decrease) in net assets resulting from operations to average net assets	(3.15%)	7.38%	(30.82%)	4.86%	0.12%
Total return on market price	(39.92%)	10.19%	18.68%	(7.14%)	(18.33%)