Furniture, Fixtures and Equipment, Net - Furniture, Fixtures and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 5,091	$ 1,263
Less: Accumulated depreciation	(1,275)	(1,023)
Property and equipment, net	$ 3,816	240
Manufacturing Equipment
Property, Plant and Equipment [Line Items]
ESTIMATED USEFUL LIVES (YEARS)	10 years
Property and equipment, gross	$ 988	0
Laboratory Equipment
Property, Plant and Equipment [Line Items]
ESTIMATED USEFUL LIVES (YEARS)	7 years
Property and equipment, gross	$ 1,619	830
Software and computer equipment
Property, Plant and Equipment [Line Items]
ESTIMATED USEFUL LIVES (YEARS)	3 years
Property and equipment, gross	$ 1,695	195
Furniture and fixtures
Property, Plant and Equipment [Line Items]
ESTIMATED USEFUL LIVES (YEARS)	5 years
Property and equipment, gross	$ 491	238
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 298	$ 0