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Shareholders' Equity - Schedule of Option Activity (Details) - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Equity [Abstract]      
Number of Shares Subject to Option, Beginning 1,407,006 1,570,799 1,480,599
Number of Shares Subject to Option, Granted 85,250 204,000 209,750
Number of Shares Subject to Option, Cancelled (200,390) (367,793) (104,750)
Number of Shares Subject to Option, Exercised (14,800)
Number of Shares Subject to Option, Ending 1,291,866 1,407,006 1,570,799
Weighted Average Exercise Price, Beginning $ 7.11 $ 7.49 $ 7.80
Weighted Average Exercise Price, Granted 1.83 5.26 5.19
Weighted Average Exercise Price, Cancelled 5.89 7.70 7.83
Weighted Average Exercise Price, Exercised 5.56
Weighted Average Exercise Price, Ending $ 6.69 $ 7.11 $ 7.49
Weighted Average Remaining Contractual Term (Years), Beginning 6 years 2 months 12 days 5 years 2 months 12 days 5 years 2 months 12 days
Weighted Average Remaining Contractual Term (Years), Ending 5 years 3 months 18 days 6 years 2 months 12 days 5 years 2 months 12 days
Aggregate Intrinsic Value