Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 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
		March 31,
(in thousands)		2018		2017
Cost of product revenue	$	-	$	8
Research and development expense		179		105
Sales, marketing, general and administrative expense		141		197
	$	320	$	310

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 March 31, 2018:

				Weighted-
			Weighted-	Average
			Average	Remaining		Aggregate
			Exercise	Contractual		Intrinsic
Options	Shares		Price	Term (years)		Value
Outstanding as of March 31, 2018	4,973,000	$	2.72	6.4	$	2,000
Exercisable as of March 31, 2018	2,769,000	$	3.32	4.7	$	-