Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2017

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

Schedule of Share-based Compensation, Stock Options, Activity

The following table summarizes information about the Company’s stock options outstanding at September 30, 2017, and activity during the nine months then ended:

					Weighted-
					Average
			Weighted-		Remaining		Aggregate
	Stock		Average		Contractual		Intrinsic
	Awards		Exercise Price		Life (Years)		Value
Balance as of December 31, 2016		2,477	$	6.50
Options granted		835	$	2.00
Options exercised		(73)	$	0.58
Options forfeited		(162)	$	6.79
Options cancelled		(105)	$	6.63
Balance as of September 30, 2017		2,972	$	5.36		7.57	$	33
Vested and expected to vest at September 30, 2017		2,972	$	5.36		7.57	$	33
Exercisable as of September 30, 2017		1,515	$	6.35		5.99	$	30

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The per-share fair value of each stock option was determined on the date of grant using the Black-Scholes option pricing model using the following assumptions:

	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Dividend yield		—			—			—			—
Risk-free interest rate		1.83% - 1.94	%		1.25% - 1.26	%		1.83% - 2.29	%		1.24% - 1.78	%
Expected term (in years)		5-6			6			5 - 9			5-10
Volatility		87	%		80	%		82	%		79	%

Schedule of Unvested Restricted Stock Units Roll Forward

RSU activity for the nine months ended September 30, 2017 is summarized below:

			Weighted-
			Average Grant
	Number of Shares		Date Fair Value
Unvested as of January 1, 2017		-
Granted		724	$	1.64
Vested		115	$	1.59
Forfeited		-
Unvested at September 30, 2017		609

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

Total stock-based compensation expense related to options and RSUs granted to employees and non-employees is included in the condensed consolidated statements of operations and comprehensive loss as follows:

	Three months ended September 30,				Nine months ended September 30,
	2017		2016		2017		2016
Sales and marketing	$	187	$	103	$	365	$	541
Research and development		103		127		287		499
General and administrative		360		221		917		1,512
Restructuring charges		-		-		186		-
	$	650	$	451	$	1,755	$	2,552