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Note 14 - Stock-based Compensation (Details Textual) - Two Thousand Eleven Omnibus Incentive Plan [Member] - USD ($)
1 Months Ended 12 Months Ended
Jan. 31, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized   2,144,743    
Share-based Compensation Award Term   10 years    
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period   5 years    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term   7 years    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term   2 years    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value   $ 679,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term   2 years    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value   $ 652,000    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options   $ 33,000    
Share-based Compensation Award, Tranche One [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 33.00%      
Share-based Compensation Award, Tranche Three [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 33.00%      
Share-based Compensation Award, Tranche Two [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 33.00%      
Minimum [Member]        
Performance Award Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 0.00%      
Maximum [Member]        
Performance Award Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 100.00%      
Employee Stock Option [Member]        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition   292 days    
Allocated Share-based Compensation Expense   $ 108,000 $ 148,000 $ 149,000
Restricted Stock Units (RSUs) [Member]        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition   1 year 328 days    
Allocated Share-based Compensation Expense   $ 1,100,000 $ 642,000 $ 329,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized   $ 1,300,000    
Restricted Stock Units (RSUs) [Member] | Minimum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   3 years    
Restricted Stock Units (RSUs) [Member] | Maximum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   5 years    
Cash [Member]        
Performance Award Plan, Matched Amount, by Type of Award 50.00%      
Restricted Stock [Member]        
Performance Award Plan, Matched Amount, by Type of Award 50.00%