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Stock-based Compensation (Details) - Restricted Stock Awards [Member]
 3 Months Ended
Mar. 31, 2018
USD ($)
$ / shares
shares
Shareholders Equity [Line Items]  
Number of Options, Outstanding Beginning Balance | shares 4,000
Number of Options, Granted | shares 31,000
Number of Options, Vested | shares (8,000)
Number of Options, Outstanding Ending Balance | shares 27,000
Grant Date Weighted-Average Fair Value, Outstanding Beginning Balance | $ / shares $ 3.77
Grant Date Weighted-Average Fair Value, Granted | $ / shares 2.55
Grant Date Weighted-Average Fair Value, Vested | $ / shares 2.55
Grant Date Weighted-Average Fair Value, Outstanding Ending Balance | $ / shares $ 2.73
Intrinsic Value, Outstanding Beginning Balance | $ $ 0
Intrinsic Value, Granted | $ 0
Intrinsic Value, Vested | $ 0
Intrinsic Value, Outstanding Ending Balance | $ $ 0