Restructuring - Narrative (Details) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2013 employee	Dec. 31, 2013 USD ($)
Restructuring (Textual) [Abstract]
Number of positions eliminated (employee) | employee	15
Restructuring charges		$ 0.8
Research and development
Restructuring (Textual) [Abstract]
Restructuring charges		0.6
Selling, general and administrative
Restructuring (Textual) [Abstract]
Restructuring charges		$ 0.2