Note 2 - Summary of Significant Accounting Policies (Details) - Share Activity (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Share Activity [Abstract]
Shares issued	23,600	63,250
Shares issued	$ 298,177	$ 928,370
Shares redeemed	(15,000)	(244,800)
Shares redeemed	(184,254)	(3,341,845)
Net increase (decrease)	8,600
Net increase (decrease)	$ 113,923	$ 2,960,794