Liability Related to Sale of Future Royalties (Tables)

12 Months Ended

Dec. 31, 2022

Deferred Revenue Disclosure [Abstract]

Schedule of Activity Within Liability Related to Sale of Future Royalties

The following table shows the activity within the liability account for the years ended December 31, 2022 and December 2021.

(In thousands)	December 31, 2022			December 31, 2021
Liability related to sale of future royalties - beginning balance	$	4,460		$	15,257
Deferred transaction costs amortized		33			234
Non-cash royalty revenue payable to HCRP		(4,739	)		(12,106	)
Non-cash interest expense recognized		246			1,075
Liability related to sale of future royalties - ending balance	$	—		$	4,460