Note 2 - Summary of Significant Accounting Policies (Details) - Share Activity (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2013
Share Activity [Abstract]
Shares issued	16,000		63,250
Shares issued	$ 202,435		$ 928,370
Shares redeemed	(6,300)		(244,800)
Shares redeemed	(77,329)		(3,341,845)
Net increase	9,700
Net increase	$ 125,106	$ 2,960,794