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Shareholders' Equity (Detail Textuals 1) - 2012 Long-Term Incentive Plan - USD ($)
1 Months Ended 6 Months Ended
Apr. 11, 2016
May 25, 2018
Jan. 31, 2018
Apr. 18, 2013
Jun. 30, 2018
Jun. 30, 2017
Executive Officers            
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]            
Number of restricted stock issued 51,000 78,750   165,000    
Number of shares authorized for issuance       300,000    
Vesting period of restricted share awards       4 years    
Compensation expense not yet recognized $ 406,000 $ 735,000   $ 1,336,500    
Service period       4 years    
Expense recognized for issuance of restricted shares         $ 85,000 $ 107,000
Number of restricted stock shares vested     28,500      
Number of shares withheld and repurchased     11,341      
Value of shares withheld and repurchased     $ 117,000      
Non-employee directors            
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]            
Number of restricted stock issued   4,288        
Compensation expense not yet recognized   $ 40,000        
Service period   12 months        
Chairman and CEO            
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]            
Number of shares vested     15,000