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Note 18 - Shareholders' Equity (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
May 10, 2017
Dec. 11, 2015
Dec. 31, 2015
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Stock Issued During Period, Shares, New Issues       26,778,000    
Proceeds from Issuance of Common Stock       $ 26,778
Payments for Repurchase of Redeemable Preferred Stock       20,000
Proceeds from Issuance of Subordinated Long-term Debt   $ 10,000 $ 10,000      
Fair Market Value Percentage Under Incentive Option Plan       100.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant       198,000    
Proceeds from Stock Options Exercised       $ 245 $ 10 $ 156
Restricted Stock [Member]            
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense       $ 53    
Restricted Stock [Member] | Minimum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period       3 years    
Restricted Stock [Member] | Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period       5 years    
Employee Stock Option [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Per Year       20.00%    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition       2 years    
Subordinated Debt [Member]            
Debt Instrument, Interest Rate, Stated Percentage   6.88%        
Subordinated Debt [Member] | London Interbank Offered Rate (LIBOR) [Member]            
Debt Instrument, Basis Spread on Variable Rate   4.00%        
Series B Preferred Stock [Member]            
Payments for Repurchase of Redeemable Preferred Stock   $ 20,000        
Payments of Dividends   $ 39        
Public Offering [Member]            
Stock Issued During Period, Shares, New Issues 2,738,096          
Share Price $ 10.50          
Proceeds from Issuance of Common Stock $ 26,800