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Note 13 - Stock Option Grants (Details Textual) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Employee Stock Option [Member] | Omnibus Incentive Plan [Member] | Minimum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1 year  
Employee Stock Option [Member] | Omnibus Incentive Plan [Member] | Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years  
Employee Stock Option [Member] | Omnibus Incentive Plan [Member]    
Allocated Share-based Compensation Expense $ 0.1 $ 0.1
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term 10 years  
Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value   $ 0.1
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value $ 0.1