Note 8 - Marketable Securities and Other Investments (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]
Marketable Securities	$ 75,019,000	[1]	$ 62,766,000	[1]
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	$ 34,100,000

[1] As of June 30, 2014 and December 31, 2013, the Company determined that $72.2 million and $59.7 million, respectively, of the Marketable securities estimated fair value were classified within Level 1 of the fair value hierarchy and the remaining $2.8 million and $3.1 million, respectively, were classified within Level 3 of the fair value hierarchy.