Sale of Future Royalties (Tables)

3 Months Ended

Mar. 31, 2022

Deferred Revenue Disclosure [Abstract]

Schedule of Activity of Royalty Obligation

The following table shows the activity of the Royalty Obligation since the transaction inception through March 31, 2022:

	As of March 31, 2022
	(In thousands)
Proceeds from sale of future royalties	$	12,601
Non-cash royalty revenue		(71	)
Non-cash interest expense recognized		3,727
Liability related to the sale of future royalties - ending balance	$	16,257
Less current portion		(433	)
Related party liability related to sale of future royalties, net of current portion	$	15,824