Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity

The activity for the 2009 Stock Option Plan, 2014 Plan and 2015 Plan for the six months ended June 30, 2017, is summarized as follows:

	Number of Shares		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life (in years)	Aggregate Intrinsic Value ($000)
Outstanding — December 31, 2016	1,819,444		$	7.52	6.98	$	32
Granted	982,803		$	3.07
Exercised	—		$	—
Canceled	(73	)	$	9.64
Outstanding — June 30, 2017	2,802,174		$	5.96	7.15	$	2
Exercisable — June 30, 2017	1,331,565		$	7.72	5.74	$	—
Vested or expected to vest — June 30, 2017	2,802,174		$	5.96	7.15	$	2

Restricted stock unit ("RSU") activity under the 2014 Plan for the six months ended June 30, 2017, is summarized as follows:

	Number of Shares	Weighted Average Grant Date Fair Value Per Share
Non-vested at December 31, 2016	—	—
Granted	48,032	$	3.00
Vested	—	—
Forfeited	—	—
Non-vested at June 30, 2017	48,032	—

Stock-Based Compensation Expense Related to Stock Options

Stock-based compensation expense related to stock options is included in the following line items in the accompanying statements of operations (dollars in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2017		2016		2017		2016
Research and development	$	119	$	86	$	213	$	156
Selling, general and administrative	319		256		620		460
Total	$	438	$	342	$	833	$	616