Basis of Presentation (Tables)

9 Months Ended

Sep. 30, 2022

Basis of Presentation [Abstract]

Schedule of revenue disaggregated by revenue source

Revenue disaggregated by revenue source for the three and nine months ended September 30, 2022 and 2021 consists of the following (in thousands); revenue excludes sales and usage-based taxes when or if it has been determined that we are acting as a pass-through agent: 

	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Product sales	$	548	$	805	$	2,914	$	3,273
Royalties		2,607		2,467		5,812		6,766
Total revenue	$	3,155	$	3,272	$	8,726	$	10,039