Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

The following table presents intangible assets as of December 31, 2017 (in thousands):

	December 31, 2017			Estimated useful life (years)
Acquired and in-licensed rights	$	8,712		11
Less: accumulated amortization	(532		)
Total intangible asset, net	$	8,180