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Note 2 - Accounting Policies (Details) - Financial Data for Investments in Affiliated Companies (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Financial Data for Investments in Affiliated Companies [Abstract]        
Revenue     $ 9,088 $ 60,845
Gross profit     3,489 14,699
Net income     2,413 7,784
Equity in earnings of affiliated companies $ 0 $ 1,310 $ 677 $ 2,212