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Note 3 - Earnings Per Share (Details) (Employee Stock Option [Member])
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Employee Stock Option [Member]
   
Note 3 - Earnings Per Share (Details) [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 0us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
0us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember