Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2018

Share-based Compensation Tables

Stock-based employee compensation expense

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

Share-based compensation expense		Three Months Ended				Six Months Ended
		June 30,				June 30,
(in thousands)		2018		2017		2018		2017
Cost of product revenue	$	-	$	10	$	-	$	19
Research and development expense		88		158		267		263
Sales, marketing, general and administrative expense		131		225		272		421
	$	219	$	393	$	539	$	703

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, 2018:

				Weighted-
			Weighted-	Average
			Average	Remaining		Aggregate
			Exercise	Contractual		Intrinsic
Options	Shares		Price	Term (years)		Value
Outstanding as of June 30, 2018	4,765,000	$	2.71	5.9	$	2,000
Exercisable as of June 30, 2018	3,111,000	$	3.15	4.5	$	-