Restructuring Costs (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 1,300,000	$ 0
Proceed Trial Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	4,100,000
Restructuring Reserve	1,300,000	0
Employee Severance and Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	$ 1,300,000