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Note 5 - Share-Based Compensation (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Note 5 - Share-Based Compensation (Details) [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares) 3,000,000   3,000,000    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares) 2,878,805   2,878,805    
Allocated Share-based Compensation Expense $ 114,000 $ 72,000 $ 228,000 $ 130,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)     2,940    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number (in Shares) 0   0   0
Restricted Stock [Member]          
Note 5 - Share-Based Compensation (Details) [Line Items]          
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options $ 875,000   $ 875,000    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition     2 years 175 days    
Restricted Stock [Member] | Share-based Compensation Award, Tranche One [Member]          
Note 5 - Share-Based Compensation (Details) [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     3 years    
Restricted Stock [Member] | Share-based Compensation Award, Tranche Two [Member]          
Note 5 - Share-Based Compensation (Details) [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     4 years    
Restricted Stock [Member] | Share-based Compensation Award, Tranche Three [Member]          
Note 5 - Share-Based Compensation (Details) [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     5 years