Note 8 - Financial Highlights (Tables)

6 Months Ended

Jun. 30, 2021

Notes Tables

Financial Highlights [Table Text Block]

	Three Months Ended June 30,						Six Months Ended June 30,
	2021			2020			2021			2020
Net asset value per Share, beginning of period	$	22.28		$	12.99		$	24.61		$	16.85
Net investment loss(a)		(0.03	)		(0.02	)		(0.06	)		(0.04	)
Net realized and unrealized gain (loss)(b)		1.64			3.65			(0.66	)		(0.19	)
Net increase (decrease) in net assets from operations		1.61			3.63			(0.72	)		(0.23	)
Net asset value per Share, end of period	$	23.89		$	16.62		$	23.89		$	16.62
Total return, at net asset value(c)(d)		7.23	%		27.94	%		(2.93	)%		(1.36	)%
Ratio to average net assets:
Net investment loss(e)		(0.50	)%		(0.50	)%		(0.50	)%		(0.50	)%
Expenses(e)		0.50	%		0.50	%		0.50	%		0.50	%