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Note 2 - Earnings Per Common Share (Details)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Employee Stock Option [Member]
   
Note 2 - Earnings Per Common Share (Details) [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 108,500 594,075
Unvested Performance Unit Awards [Member]
   
Note 2 - Earnings Per Common Share (Details) [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 35,964 51,962