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Stockholders' Equity (Details 3) - Nonvested Restricted Stock [Member] - $ / shares
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]    
Outstanding, beginning of year 258,572 167,040
Granted 299,000
Vested/cancelled (129,361) (207,468)
Outstanding, end of year 129,250 258,572
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]    
Outstanding, beginning of year $ 10.55 $ 21.60
Granted 9.25
Vested/cancelled 10.04 17.75
Outstanding, end of year $ 11.07 $ 10.55