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Stock-based Compensation (Details Textual) - USD ($)
3 Months Ended 12 Months Ended
Jan. 04, 2017
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Jun. 30, 2010
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]          
Allocated Share Based Compensation Expense   $ 55,000 $ 50,000 $ 108,000  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized   434,000      
Allocated Share-based Compensation Expense   55,000 $ 50,000 $ 108,000  
Incentive Compensation Plan [Member]          
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]          
Common Stock, Capital Shares Reserved for Future Issuance         1,630,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized   $ 238,000      
Performance Share Award Agreement [Member]          
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 161,766        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number   129,000