Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Schedule of Property, Plant and Equipment

Furniture and fixtures	10 years
Computer equipment	3 years
Software	3 years
Leasehold improvements	Life of lease

Property, plant, and equipment consisted of the following (in thousands):

	December 31,
	2017			2016
Lab equipment	$	—		$	181.6
Furniture and fixtures	25.4			288.2
Computer equipment	998.3			1,173.4
Software	—			99.5
Leasehold improvements	65.6			115.7
Property, plant and equipment, gross	1,089.3			1,858.4
Accumulated depreciation	(832.4		)	(1,153.0		)
Property, plant and equipment, net	$	256.9		$	705.4