Long Term Obligations - San Diego Lease (Details) - San Diego Lease ft² in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) ft² term
Property, Plant and Equipment [Line Items]
Area of real estate property (in square feet) | ft²	170
Length of lease	16 years
Average yearly aggregate rent | $	$ 10.2
Amount of optional renewal terms | term	2
Optional renewal term length	5 years