Share-Based Compensation (Tables)

6 Months Ended

Jun. 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				Six Months Ended
		June 30,				June 30,
(in thousands)		2017		2016		2017		2016
Cost of product revenue	$	10	$	10	$	19	$	20
Research and development expense		158		102		263		185
Sales, marketing, general and administrative expense		225		262		421		469
	$	393	$	374	$	703	$	674

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, 2017:

				Weighted-
			Weighted-	Average
			Average	Remaining		Aggregate
			Exercise	Contractual		Intrinsic
Options	Shares		Price	Term (years)		Value
Outstanding as of June 30, 2017	5,244,000	$	2.91	7.7	$	1,294,000
Exercisable as of June 30, 2017	2,514,000	$	3.96	6.2	$	400,000