Liability Related to Sale of Future Royalties (Tables)

12 Months Ended

Dec. 31, 2019

Liability Related to Sale of Future Royalties

Schedule of Liability account during the period from the inception of the royalty transaction

The following table shows the activity within the liability account during the year ended December 31, 2019 and the period from inception (in thousands):

			Period from
	Year Ended		inception to
	December 31, 2019		December 31, 2019
Liability related to sale of future royalties, net — beginning balance	$	148,225	$	—
Proceeds from sale of future royalties, net		—		194,135
Kadcyla royalty payments received and paid		(41,548)		(145,172)
Non-cash interest expense recognized		16,864		74,578
Liability related to sale of future royalties, net — ending balance	$	123,541	$	123,541