Note 9 - Marketable Securities and Other Investments (Detail) (USD $)	Sep. 30, 2012		Dec. 31, 2011
Marketable Securities	$ 35,811,000	[1]	$ 33,540,000	[1]
Available-for-sale Securities, Gross Unrealized Gains	$ 18,500,000

[1] As of September 30, 2012, $32.7 million of these assets' estimated fair value were classified within Level 1 of the fair value hierarchy and the remaining $3.4 million were classified within Level 3 of the fair value hierarchy.