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Stock-Based Compensation (Detail Textuals)
1 Months Ended 3 Months Ended
Mar. 20, 2018
Installment
shares
Jan. 31, 2018
USD ($)
shares
Jul. 31, 2017
USD ($)
shares
Feb. 27, 2017
USD ($)
Installment
shares
Mar. 31, 2018
USD ($)
Mar. 31, 2017
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock-based compensation expense         $ 24,000 $ 71,000
2001 Nonqualified Stock Plan | Unrestricted Stock | 2018 Grant | Directors, officers and employees            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares granted (in shares) | shares 138,000          
Number of installment | Installment 2          
Stock-based compensation expense         580,000  
Stock based compensation expense charged         24,000  
Remaining stock based compensation expense         $ 556,000  
2001 Nonqualified Stock Plan | Unrestricted Stock | 2017 Grant | Directors, officers and employees            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares granted (in shares) | shares       134,000    
Number of installment | Installment       2    
Stock-based compensation expense       $ 663,000    
Number of shares issued (in shares) | shares   53,378 54,014      
Number of common stock shares surrendered by employees withholding taxes | shares   13,622 12,986      
Common stock value surrendered by employees withholding taxes   $ 64,000 $ 67,000