Share-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2020

Canceled/expired

Stock-based employee compensation expense

The following table summarizes the amount of share-based compensation expense by line item on the statements of operations:

		Three Months Ended				Nine Months Ended
		September 30,				September 30,
(in thousands)		2020		2019		2020		2019
Cost of product revenue	$	-	$	25	$	-	$	26
Research and development expense		291		84		433		283
Sales, marketing, general and administrative expense		159		149		406		568
	$	450	$	258	$	839	$	877

Options activity and positions

The following table summarizes shares, weighted-average exercise price, weighted-average remaining contractual term and aggregate intrinsic value of options outstanding and options exercisable as of September 30, 2020:

				Weighted-
			Weighted-	Average
			Average	Remaining		Aggregate
			Exercise	Contractual		Intrinsic
Options	Shares		Price	Term (years)		Value
Outstanding as of September 30, 2020	3,906,000	$	1.49	6.6	$	2,459,000
Exercisable as of September 30, 2020	2,658,000	$	1.78	5.7	$	1,105,000