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Shareholders' Equity - 2012 Long-Term Incentive Plan (Details) - 2012 Long Term Incentive Plan - USD ($)
1 Months Ended
Apr. 26, 2019
Jan. 31, 2019
May 25, 2018
Executive Officer      
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]      
Number of restricted stock issued     78,750
Compensation expense not yet recognized     $ 735,000
Number of restricted stock shares vested   26,250  
Number of shares withheld and repurchased   9,729  
Value of shares withheld and repurchased   $ 99,000  
Non-employee directors      
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]      
Number of restricted stock issued 7,836   4,288
Compensation expense not yet recognized $ 100,000   $ 40,000
Service period     12 months