Share-Based Compensation (Tables)

6 Months Ended

Jun. 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				Six Months Ended
		June 30,				June 30,
(in thousands)		2020		2019		2020		2019
Cost of product revenue	$	-	$	-	$	-	$	1
Research and development expense		103		76		142		199
Sales, marketing, general and administrative expense		97		192		247		419
	$	200	$	268	$	389	$	619

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 June 30, 2020:

				Weighted-
			Weighted-	Average
			Average	Remaining		Aggregate
			Exercise	Contractual		Intrinsic
Options	Shares		Price	Term (years)		Value
Outstanding as of June 30, 2020	4,011,000	$	1.50	6.8	$	1,070,000
Exercisable as of June 30, 2020	2,287,000	$	1.98	5.4	$	165,000