Stock-Based Compensation (Summary of Stock Option Activity) (Details) - USD ($)	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Stock-Based Compensation [Abstract]
Shares Available for Grant, Balance at December 31, 2015		723,431
Shares Available for Grant, Granted		(224,208)
Shares Available for Grant, Exercised
Shares Available for Grant, Forfeited		150,956
Shares Available for Grant, Expired
Shares Available for Grant, Authorized		1,000,000
Shares Available for Grant, Balance at June 30, 2016	1,650,179	1,650,179	723,431
Shares, Balance at December 31, 2015	739,021	669,769
Shares, Granted		224,208
Shares, Exercises
Shares, Forfeited		(150,856)
Shares, Expired		(4,100)
Shares, Balance at June 30, 2016	739,021	739,021	669,769
Shares, Vested or expected to vest at June 30, 2016	612,640	612,640
Shares, Exercisable at June 30, 2016	154,312	154,312
Weighted Average Exercise Price, Outstanding at December 31, 2015		$ 8.68
Weighted Average Exercise Price, Granted		2.85
Weighted Average Exercise Price, Exercised
Weighted Average Exercise Price, Forfeited		9.03
Weighted Average Exercise Price, Expired		14.39
Weighted Average Exercise Price, Outstanding at June 30, 2016	$ 6.81	6.81	$ 8.68
Weighted Average Exercise Price, Vested or expected to vest at June 30, 2016	7.18	7.18
Weighted Average Exercise Price, Exercisable at March 31, 2016	$ 8.93	$ 8.93
Average Remaining Contractual Term (Years), Outstanding at December 31, 2015		8 years 11 months 27 days	9 years 3 months 15 days
Average Remaining Contractual Term (Years), Outstanding at June 30, 2016		8 years 11 months 27 days	9 years 3 months 15 days
Average Remaining Contractual Term (Years), Vested or expected to vest at June 30, 2016		8 years 10 months 28 days
Average Remaining Contractual Term (Years), Exercisable at June 30, 2016		7 years 10 months 28 days
Intrinsic Value, Exercisable at June 30, 2016	$ 0	$ 0