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	%