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Note 11 - Basic and Diluted Earnings Per Common Share (Details) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Note 11 - Basic and Diluted Earnings Per Common Share (Details) [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 45,000   114,400  
Stock Repurchased and Retired During Period, Shares   0    
Stock Repurchase [Member]        
Note 11 - Basic and Diluted Earnings Per Common Share (Details) [Line Items]        
Stock Repurchased and Retired During Period, Shares 25,413 0 239,502 6,092
Dutch Auction Member        
Note 11 - Basic and Diluted Earnings Per Common Share (Details) [Line Items]        
Stock Repurchased and Retired During Period, Shares     193,907