FINANCIAL HIGHLIGHTS (Details) - $ / shares	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Per Share Operating Performance:
Net asset value, beginning of period	$ 21.54	$ 14.74	$ 16.85	$ 20.36
Total income (loss)	(6.18)	2.7	(1.43)	(2.86)
Total expenses	(0.05)	(0.05)	(0.11)	(0.11)
Net increase (decrease) in net asset value	(6.23)	2.65	(1.54)	(2.97)
Net asset value, end of period	$ 15.31	$ 17.39	$ 15.31	$ 17.39
Total Return	(28.92%)	17.98%	(9.14%)	(14.59%)
Ratios to Average Net Assets
Total income (loss)	(32.28%)	21.95%	18.13%	1.79%
Management fees	0.60%	0.60%	0.60%	0.60%
Total expenses excluding management fees	0.60%	0.65%	0.65%	0.65%
Net income (loss)	(32.58%)	21.64%	17.51%	1.17%