FINANCIAL HIGHLIGHTS (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2021
Per Share Data (1)
Net asset value at beginning of period	$ 1.24	$ 1.08	$ 0.91	$ 1.02	$ 0.87
Net investment income (loss)	0.04	0.00	0.00	(0.02)	(0.01)
Net realized and unrealized gains (losses)	0.01	0.22	(0.03)	0.12	0.06
Provision for income taxes	(0.01)	(0.06)	0.00	0.00	0.00
Payment of common stock dividend	(0.00)	(0.00)	(0.00)	(0.05)	(0.00)
Net asset value at end of period	1.28	1.24	0.88	1.07	0.92
Ratio / Supplemental Data
Per share market value of investments at end of period	$ 1.86	$ 1.25	$ 0.41	$ 0.78	$ 0.76
Shares outstanding at end of period	10,790,413	10,786,913	11,067,402	11,067,402	11,067,402	10,790,413
Average weighted shares outstanding for the period	10,790,413	10,785,913	11,067,402	11,067,402	11,863,392
Net assets at end of period	$ 13,826,160	$ 13,391,679	$ 9,786,615	$ 11,890,188	$ 9,783,191
Average net assets	$ 13,620,104	$ 12,516,283	$ 9,927,574	$ 12,911,895	$ 9,770,410
Total investment return	3.23%	14.81%	(3.30%)	4.90%	5.75%
Portfolio turnover rate	8.46	40.24	0.75	0.93	0.80
Ratio of operating expenses to average net assets	(15.28%)	(16.20%)	(7.82%)	(6.06%)	(7.52%)
Ratio of net investment income (loss) to average net assets	14.24%	0.42%	0.87%	(4.87%)	(6.16%)
Ratio of realized gains (losses) to average net assets	4.20	133.32	1.00	137.57	2.17