Stock Based Compensation (Details) - Stock option activity - Employee Stock Option [Member] - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2015
Stock Based Compensation (Details) - Stock option activity [Line Items]
Options outstanding, Number of shares	1,166,192	1,371,354
Options outstanding, Weighted-Average Exercise Price	$ 5.93	$ 5.97
Options outstanding, Weighted-Average Remaining Contractual Term	3 years 292 days	5 years 255 days	4 years 255 days
Options Forfeited, Number of shares			(184,798)
Options Forfeited, Weighted-Average Exercise Price			$ 4.31
Options Expired, Number of shares	(36,610)		(20,364)
Options Expired, Weighted-Average Exercise Price	$ 23.88		$ 23.41
Options outstanding, Number of shares	1,129,582	1,166,192	1,166,192
Options outstanding, Weighted-Average Exercise Price	$ 5.35	$ 5.93	$ 5.93
Options outstanding, Weighted-Average Remaining Contractual Term	3 years 292 days	5 years 255 days	4 years 255 days
Options outstanding, Aggregate Intrinsic Value
Exercisable, Number of shares	1,129,582
Exercisable, Weighted-Average Exercise Price	$ 5.35
Exercisable, Weighted-Average Remaining Contractual Term	3 years 292 days
Exercisable, Aggregate Intrinsic Value