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Note 6 - Stock Option Plan (Details) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended 67 Months Ended
Feb. 17, 2015
May. 20, 2009
Jun. 30, 2015
Jun. 30, 2015
Dec. 31, 2014
Dec. 31, 2014
Restricted Stock [Member]            
Note 6 - Stock Option Plan (Details) [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period       19,500    
Allocated Share-based Compensation Expense (in Dollars)     $ 21,000 $ 38,000    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period       500    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value (in Dollars)       $ 13,000    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options (in Dollars)     $ 415,000 $ 415,000    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition       5 years    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)       $ 24.50    
Restricted Stock [Member] | Directors, Officers and Key Employees [Member]            
Note 6 - Stock Option Plan (Details) [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 19,500          
Share Price (in Dollars per share) $ 24.50          
Stock Issued During Period, Value, Restricted Stock Award, Gross (in Dollars) $ 478,000          
Restricted Stock [Member] | Directors, Officers and Key Employees [Member] | Subsequent Event [Member]            
Note 6 - Stock Option Plan (Details) [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 19,500          
Stock Issued During Period, Value, Restricted Stock Award, Gross (in Dollars) $ 478,000          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share) $ 24.50          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 5 years          
2009 Equity Incentive Plan [Member]            
Note 6 - Stock Option Plan (Details) [Line Items]            
Maximum Fair Value of First Exercisable Stock Incentive Options   100,000        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross       0   0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period           0
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized         223,000 223,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period         10 years  
2009 Equity Incentive Plan [Member] | Common Stock [Member]            
Note 6 - Stock Option Plan (Details) [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant   223,000        
Vesting Each Year on July 1 Beginning July 1, 2016 [Member] | Restricted Stock [Member] | Directors, Officers and Key Employees [Member]            
Note 6 - Stock Option Plan (Details) [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 20.00%          
Maximum [Member] | Employee Stock Option [Member]            
Note 6 - Stock Option Plan (Details) [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Grant Date Fair Value of Awards (in Dollars)         $ 100,000