Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation (Tables)

v3.10.0.1
Stock-based Compensation (Tables)
 9 Months Ended
Sep. 30, 2018
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 as of September 30, 2018, and activity during the nine months then ended:
 
Stock
Awards
 
Weighted-
Average
Exercise Price
 
Weighted-
Average
Remaining
Contractual
Life (Years)
 
Aggregate
Intrinsic
Value
Balance as of December 31, 2017
3,156

 
$
4.96

 
 
 
 
Options granted
3,295

 
$
1.90

 
 
 
 
Options exercised
(1
)
 
1.13

 
 
 
 
Options forfeited
(427
)
 
$
4.68

 
 
 
 
Options cancelled
(135
)
 
$
8.07

 
 
 
 
Balance as of September 30, 2018
5,888

 
$
3.20

 
8.36
 
$
2,358

Vested and expected to vest at September 30, 2018
5,888

 
$
3.20

 
8.36
 
$
2,358

Exercisable as of September 30, 2018
2,065

 
$
5.45

 
5.98
 
$
308

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,
 
2018
 
2017
 
2018
 
2017
Dividend yield
—

 
—

 
—

 
—

Risk-free interest rate
2.75%-2.99%

 
1.83%-1.94%

 
2.70% - 2.99%

 
1.83%-2.29%

Expected term (in years)
5-6

 
5-6

 
5-10

 
5-9

Volatility
106
%
 
87
%
 
104
%
 
82
%
Schedule of Unvested Restricted Stock Units Roll Forward
RSU activity for the period ended September 30, 2018 is summarized below:
 
Number of
Shares
 
Weighted-
Average Grant
Date Fair Value
Unvested as of December 31, 2017
617

 
$
1.65

Granted
354

 
$
1.78

Vested
(584
)
 
$
1.45

Forfeited
(94
)
 
$
2.78

Unvested at September 30, 2018
293

 
$
1.82

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,
 
2018
 
2017
 
2018
 
2017
Sales and marketing
$
171

 
$
187

 
$
446

 
$
365

Research and development
87

 
103

 
312

 
287

General and administrative
680

 
360

 
1,474

 
917

Restructuring charges
—

 
—

 
—

 
186

 
$
938

 
$
650

 
$
2,232

 
$
1,755