Summary of Significant Accounting Policies (Share-Based Compensation) (Tables)

12 Months Ended

Dec. 31, 2020

Canceled/expired

Stock-based employee compensation expense (Tables)

The following table summarizes the amount of share-based compensation expense by line item on the Statement of Operations (in thousands):

		Year Ended December 31,
		2020		2019
Cost of product revenue	$	-	$	26
Research and development expense		699		379
Sales, marketing, general and administrative expense		598		1,209
	$	1,297	$	1,614