Share-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2017

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:

		Three Months Ended				Nine Months Ended
		September 30,				September 30,
(in thousands)		2017		2016		2017		2016
Cost of product revenue	$	14	$	9	$	33	$	29
Research and development expense		131		98		394		283
Sales, marketing, general and administrative expense		179		199		600		668
	$	324	$	306	$	1,027	$	980

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, 2017:

				Weighted-
			Weighted-	Average
			Average	Remaining		Aggregate
			Exercise	Contractual		Intrinsic
Options	Shares		Price	Term (years)		Value
Outstanding as of September 30, 2017	5,246,000	$	2.93	7.5	$	3,885,000
Exercisable as of September 30, 2017	2,514,000	$	3.97	6.0	$	1,498,000