Intangible Assets, Net (Tables)

3 Months Ended

Mar. 31, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets, Net

The following table presents intangible assets (in thousands):

	March 31,			December 31,			Estimated
	2019			2018			useful life
Acquired and in-licensed rights	$	2,262		$	2,262		7 - 21 Years
Capitalized regulatory approval milestones		90,000			90,000		16 Years
Less accumulated amortization		(4,794	)		(3,348	)
Total intangible assets, net	$	87,468		$	88,914

Schedule of Estimated Future Amortization Expenses for Intangible Assets

Estimated future amortization expense for intangible assets as of March 31, 2019 is as follows (in thousands):

	Total
2019	$	4,417
2020		5,879
2021		5,861
2022		5,856
2023		5,843
Thereafter		59,612
	$	87,468