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Stock-Based Compensation (Details 1) - Stock options [Member]
6 Months Ended
Jun. 30, 2016
$ / shares
shares
Summary of all stock option plans  
Number of Options/Warrants Outstanding, Beginning Balance | shares 2,184,117
Number of Options Outstanding, Granted | shares
Number of Options Outstanding, Forfeited | shares (297,147)
Number of Options/Warrants Outstanding, Ending Balance | shares 1,886,970
Weighted Average Exercise Price, Outstanding, Beginning Balance | $ / shares $ 4.48
Weighted Average Exercise Price, Granted | $ / shares
Weighted Average Exercise Price, Forfeited | $ / shares 4.70
Weighted Average Exercise Price, Outstanding, Ending Balance | $ / shares $ 4.45