Note 8 - Financial Highlights (Tables)

6 Months Ended

Jun. 30, 2016

Notes Tables

Financial Highlights [Table Text Block]

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
Net asset value per Share, beginning of period	$	14.64		$	15.88		$	13.17		$	15.29
Net investment loss (a)		(0.02	)		(0.02	)		(0.04	)		(0.04	)
Net realized and unrealized gain (loss) (b)		2.83			(0.86	)		4.32			(0.25	)
Net increase (decrease) in net assets from operations		2.81			(0.88	)		4.28			(0.29	)
Net asset value per Share, end of period	$	17.45		$	15.00		$	17.45		$	15.00
Total return, at net asset value (c)(d)		19.19	%		(5.54	) %		32.50	%		(1.90	) %
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	%