Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of intangible assets

The following table presents intangible assets as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019			December 31, 2018			Estimated useful life
Acquired and in-licensed rights	$	8,712		$	8,712		11 years
Less: accumulated amortization	(1,730		)	(1,330		)
Total intangible asset, net	$	6,982		$	7,382