Sale of Future Revenues (Tables)

12 Months Ended

Dec. 31, 2021

Revenue from Contract with Customer [Abstract]

Royalty Obligation Activity

The following table shows the activity of the liability related to the sale of future revenue for the year ended December 31, 2021:

Liability related to the sale of future revenue, net at December 31, 2020	$	48,974
Royalties related to the sale of future revenue	(1,102)
Amortization of issuance costs	159
Interest expense related to the sale of future revenue	12,253
Liability related to the sale of future revenue, net (includes current portion of $1,225)	$	60,284