Note 8 - Marketable Securities and Other Investments (Detail) (USD $)	Mar. 31, 2013		Dec. 31, 2012
Marketable Securities	$ 76,786,000	[1]	$ 36,541,000	[1]
Available-for-sale Securities, Gross Unrealized Gains	$ 26,000,000

[1] As of March 31, 2013 and December 31, 2012, the Company determined that $73.8 million and $22.4 million, respectively, of the marketable securities estimated fair value were classified within Level 1 of the fair value hierarchy and the remaining $3.3 million and $3.4 million, respectively, were classified within Level 3 of the fair value hierarchy.