Intangible Assets and Goodwill (Tables)

3 Months Ended

Mar. 31, 2020

Intangible Assets

Intangible assets related to capitalized milestones under license agreements

Intangible assets related to capitalized milestones under license agreements consisted of the following (in thousands):

	March 31,		December 31,
	2020		2019
Intangible asset - milestones	$	71,850	$	71,850
Accumulated amortization		(10,142)		(8,930)
Total intangible asset, net	$	61,708	$	62,920

Estimated future amortization expense for intangible assets

Estimated future amortization expense associated with intangibles is expected to be as follows (in thousands):

2020	$	3,635
2021		4,847
2022		4,847
2023		4,847
2024		4,847
Thereafter		38,685
	$	61,708