Stock-Based Compensation (Details) - Stock Option - $ / shares	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Schedule of activity under stock option plans [Line Items]
Outstanding at January 1	1,205,913	664,081
Cancelled or expired, Shares	(19,334)	(101,875)
Outstanding at June 30	1,186,579	562,206
Exercisable at June 30	388,021	388,603
Outstanding at January 1, Weighted Average Exercise Price	$ 5.21	$ 10.64
Cancelled or expired, Weighted Average Exercise Price	11.42	9.6
Outstanding at June 30, Weighted Average Exercise Price	5.11	10.83
Exercisable at June 30, Weighted Average Exercise Price	11.42	12.82
Outstanding at January 1, Weighted Average Fair Value At Grant Date	2.82	5.32
Cancelled or expired, Weighted Average Fair Value At Grant Date	7.91	4.54
Outstanding at June 30, Weighted Average Fair Value At Grant Date	2.8	5.46
Exercisable at June 30, Weighted Average Fair Value At Grant Date	$ 5.67	$ 6.2