Note 8 - Financial Highlights (Tables)

3 Months Ended

Mar. 31, 2015

Financial Highlights [Abstract]

Financial Highlights [Table Text Block]

	Three Months Ended March 31,
	2015			2014
Net asset value per Share, beginning of period	$	11.61		$	11.66
Net investment loss(a)		(0.01	)		(0.01	)
Net realized and unrealized gain (loss)(b)		(0.12	)		0.87
Net increase (decrease) in net assets from operations		(0.13	)		0.86
Net asset value per Share, end of period	$	11.48		$	12.52
Total return, at net asset value(c)(d)		(1.12	)%		7.38	%
Ratio to average net assets:
Net investment loss(e)		(0.25	)%		(0.25	)%
Expenses(e)		0.25	%		0.25	%