Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Tables)

v3.7.0.1
Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2017
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, 2017 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, 2017
2,198

 
$
9.09

 
7.04
 
$

Granted
602

 
2.85

 
 
 
 
Exercised
(2
)
 
2.27

 
 
 
 
Cancelled or expired
(220
)
 
11.12

 
 
 
 
Outstanding June 30, 2017
2,578

 
$
7.46

 
7.14
 
$
1,407

Exercisable June 30, 2017
1,435

 
$
9.77

 
5.72
 
$
196

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 granted to employees during the periods presented:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2017
 
2017
Volatility
76.91
%
 
74.31
%
Risk free interest rate
1.87
%
 
1.99
%
Dividend yield
0.00
%
 
0.00
%
Term (years)
5.90

 
5.98

Weighted-average fair value of options granted during the period
2.75

 
1.88

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,
 
2017
 
2016
 
2017
 
2016
Volatility
76.39
%
 
74.61
%
 
76.90
%
 
75.26
%
Risk free interest rate
2.19
%
 
1.27
%
 
2.21
%
 
1.42
%
Dividend yield
0.00
%
 
0.00
%
 
0.00
%
 
0.00
%
Term (years)
6.89

 
7.89

 
7.02

 
8.02

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, 2017:
 
Non-vested Restricted Stock Awards
 
Number of
Shares
(in thousands)
 
Weighted-Average Grant Date Fair Value
Non-vested at January 1, 2017
80

 
$
6.30

Granted
18

 
4.15

Vested
(21
)
 
8.42

Cancelled
(2
)
 
$
11.36

Non-vested at June 30, 2017
75

 
$
5.07

Effects of stock-based compensation related to stock option and restricted stock 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 Consolidated Statements of Operations during the periods presented (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2017
 
2016
 
2017
 
2016
Cost of revenues
$
69

 
$
67

 
$
128

 
$
136

Research and development
49

 
45

 
99

 
95

General and administrative
293

 
352

 
593

 
739

Sales and marketing
30

 
26

 
56

 
54

Total stock-based compensation
$
441

 
$
490

 
$
876

 
$
1,024