Basis of Presentation (Tables)

3 Months Ended

Mar. 31, 2022

Basis of Presentation [Abstract]

Schedule of revenue disaggregated by revenue source

Revenue disaggregated by revenue source for the three months ended March 31, 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 March 31,
	2022		2021
Product sales	$	934	$	1,163
Royalties		1,818		1,816
Total revenue	$	2,752	$	2,979