Liability Related to the Sale of Future Royalties and Milestones (Tables)

12 Months Ended

Dec. 31, 2019

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

	Year ended December 31, 2019			Period from inception to December 31, 2019
Liability related to sale of future royalties and milestones - beginning balance	$	210,795		$	—
Proceeds from sale of future royalties and milestones		—			205,000
Non-cash royalty revenue		(30,424	)		(47,733	)
Non-cash interest expense recognized		41,474			64,578
Liability related to sale of future royalties and milestones - ending balance		221,845			221,845
Less: unamortized transaction costs		(476	)		(476	)
Liability related to sale of future royalties and milestones, net	$	221,369		$	221,369