Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Tables)

v3.5.0.2
Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of Employee and Nonemployee Stock Option Activity
A summary of employee and non-employee stock option activity for the six months ended June 30, 2016 is as follows:
 
Options Outstanding
 
Weighted-
Average
Remaining
Contractual
Term (in years)
 
Aggregate
Intrinsic
Value
(in thousands)
 
Number of
Shares
(in thousands)
 
Weighted-
Average
Exercise
Price
 
Outstanding January 1, 2016
1,961

 
$
10.55

 
7.68
 
$

Canceled or expired
(69
)
 
9.78

 
 
 
 
Outstanding June 30, 2016
1,892

 
$
10.57

 
7.13
 
$

Exercisable June 30, 2016
1,173

 
$
10.43

 
6.46
 
$

Weighted-Average Assumptions Used to Estimate Fair Value of Options Granted
The following table presents the weighted-average assumptions used to estimate the fair value of options reaching their measurement date for non-employees during the periods presented:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Volatility
74.61
%
 
69.85
%
 
75.26
%
 
70.18
%
Risk free interest rate
1.27
%
 
2.42
%
 
1.42
%
 
2.15
%
Dividend yield
0.00
%
 
0.00
%
 
0.00
%
 
0.00
%
Term (years)
7.89

 
8.84

 
8.02

 
8.96

The following table presents the weighted-average assumptions used to estimate the fair value of options granted to employees during the periods presented:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2015
 
2015
Volatility
58.83
%
 
63.89
%
Risk free interest rate
1.61
%
 
1.65
%
Dividend yield
0.00
%
 
0.00
%
Term (years)
5.99

 
6.15

Weighted-average fair value of options granted during the period
5.71

 
5.77

Nonvested Restricted Stock Shares Activity
The following table summarizes the activities for our non-vested restricted stock awards for the six months ended June 30, 2016:
 
Non-vested Restricted Stock Awards
 
Number of
Shares
(in thousands)
 
Weighted-Average Grant Date Fair Value
Non-vested at January 1, 2016
121

 
$
8.25

Vested
(37
)
 
9.84

Non-vested at June 30, 2016
84

 
$
7.55

Effects of Stock-Based Compensation Related to Awards
The following table presents the effects of stock-based compensation related to stock option and restricted stock awards to employees and non-employees on our Statement of Operations during the periods presented (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Cost of revenues
$
67

 
$
55

 
$
136

 
$
104

Research and development
45

 
128

 
95

 
223

General and administrative
352

 
535

 
739

 
1,056

Sales and marketing
26

 
39

 
54

 
71

Total stock-based compensation
$
490

 
$
757

 
$
1,024

 
$
1,454