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Stock-Based Compensation (Detail Textuals) - 2001 Nonqualified Stock Plan - Unrestricted Stock - Directors, officers and employees
1 Months Ended 3 Months Ended 9 Months Ended
Jul. 03, 2017
USD ($)
shares
Feb. 27, 2017
Installment
shares
Jan. 31, 2017
USD ($)
shares
Jul. 31, 2016
USD ($)
shares
Mar. 31, 2016
USD ($)
Installment
shares
Sep. 30, 2017
USD ($)
Sep. 30, 2017
USD ($)
2017 Grant              
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
Stock based compensation expense charged | $           $ 198,000 465,000
Remaining stock based compensation expense | $           $ 198,000 $ 198,000
Number of shares issued (in shares) | shares 54,014            
Number of common stock shares surrendered by employees withholding taxes | shares 12,986            
Common stock value surrendered by employees withholding taxes | $ $ 67,000            
2016 Grant              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares granted (in shares) | shares         152,000    
Number of installment | Installment         2    
Stock-based compensation expense | $         $ 558,000    
Number of shares issued (in shares) | shares     56,443 58,902      
Number of common stock shares surrendered by employees withholding taxes | shares     19,557 17,098      
Common stock value surrendered by employees withholding taxes | $     $ 119,000 $ 74,000