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Stock-based Compensation (Tables)
12 Months Ended
Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Stock Options and Awards
 
December 31,
 
2015
Common stock shares available for grant
1,322,579

Standard and market condition based stock options outstanding
3,796,533

Restricted stock awards outstanding
21,356

Restricted stock units outstanding
487,423

Schedule of Employee Stock Purchase Plan
The intrinsic value listed below is calculated as the difference between the market value on the date of purchase and the purchase price of the shares.
 
Year Ended December 31, 2015
Shares purchased under ESPP
45,820

Average price of shares purchased under ESPP
$
8.00

Intrinsic value of shares purchased under ESPP
$
160,000

Schedule of Standard and Market-based Stock Options Activity
The following table sets forth the summary of the market condition based option activity under the Company’s stock option plans for the years ended December 31, 2015 and 2014:
 
Number
of  Shares    
 
Weighted
Average
Exercise
Price    
 
Weighted
Average
Fair Value
Of Options Granted    
 
Aggregate
Intrinsic
Value
of Options Exercised(In thousands)  
Outstanding at January 1, 2014

 
$

 
 
 
 
Granted
50,000

 
11.94

 
5.71

 
 
Exercised

 

 
 
 
$

Forfeited

 

 
 
 
 
Expired

 

 
 
 
 
Outstanding at December 31, 2014
50,000

 
11.94

 
 
 
 
Granted
150,000

 
8.09

 
3.64

 
 
Exercised

 

 
 
 

Forfeited

 

 
 
 
 
Expired

 

 
 
 
 
Outstanding at December 31, 2015
200,000

 
9.05

 
 
 
 
The following table sets forth the summary of standard stock option activity under the Company’s stock option plans for the years ended December 31, 2015, 2014, and 2013:
 
Number
of Shares
 
Weighted
Average
Exercise Price
 
Weighted
Average
Fair Value
Of Options Granted
 
Aggregate
Intrinsic
Value
of Options
Exercised
(In thousands)
Outstanding at January 1, 2013
3,155,631

 
$
6.65

 
 
 
 
Granted
1,058,700

 
10.20

 
$
5.63

 
 
Exercised
(956,633
)
 
6.68

 
 
 
$
5,774

Forfeited
(10,531
)
 
8.24

 
 
 
 
Expired
(20,000
)
 
9.01

 
 
 
 
Outstanding at December 31, 2013
3,227,167

 
7.78

 
 
 
 
Granted
604,620

 
10.32

 
4.93

 
 
Exercised
(205,744
)
 
6.34

 
 
 
1,125

Forfeited
(102,454
)
 
7.20

 
 
 
 
Expired
(37,432
)
 
10.19

 
 
 
 
Outstanding at December 31, 2014
3,486,157

 
8.30

 
 
 
 
Granted
525,840

 
10.15

 
4.56

 
 
Exercised
(239,071
)
 
6.82

 
 
 
1,186

Forfeited
(116,425
)
 
12.38

 
 
 
 
Expired
(59,968
)
 
13.75

 
 
 
 
Outstanding at December 31, 2015
3,596,533

 
8.45

 
 
 
 
Schedule of Information Regarding Standard and Market Condition Based Stock Options Outstanding
Information regarding these market condition based stock options outstanding at December 31, 2015 and 2014 is summarized below:
 
Number
of  Shares    
 
Weighted
Average
Exercise
Price    
 
Weighted
Average
Remaining
Contractual Life (years)     
 
Aggregate
Intrinsic
Value(In millions)  
December 31, 2014
 
 
 
 
 
 
 
Options outstanding
50,000

 
$
11.94

 
6.15

 
$

Options vested and expected to vest using estimated forfeiture rates
45,430

 
11.94

 
6.15

 

Options exercisable

 

 

 

December 31, 2015
 
 
 
 
 
 
 
Options outstanding
200,000

 
$
9.05

 
5.92

 
$
0.5

Options vested and expected to vest using estimated forfeiture rates
184,125

 
9.12

 
5.90

 
0.5

Options exercisable

 

 

 

Information regarding standard stock options outstanding at December 31, 2015, 2014, and 2013 is summarized below:
 
Number  of
Shares
 
Weighted
Average
Exercise
Price
 
Weighted
Average
Remaining
Contractual
Life (years)
 
Aggregate
Intrinsic
Value
(In millions)
December 31, 2013
 
 
 
 
 
 
 
Options outstanding
3,227,167

 
$
7.78

 
5.46
 
$
9.9

Options vested and expected to vest using estimated forfeiture rates
2,994,044

 
7.61

 
5.41
 
9.6

Options exercisable
1,774,546

 
6.67

 
4.95
 
7.5

December 31, 2014
 
 
 
 
 
 
 
Options outstanding
3,486,157

 
$
8.30

 
4.85
 
$
6.6

Options vested and expected to vest using estimated forfeiture rates
3,319,308

 
8.21

 
4.80
 
6.6

Options exercisable
2,023,024

 
7.18

 
4.26
 
6.0

December 31, 2015
 
 
 
 
 
 
 
Options outstanding
3,596,533

 
$
8.45

 
4.23
 
$
12.5

Options vested and expected to vest using estimated forfeiture rates
3,452,487

 
8.36

 
4.16
 
12.3

Options exercisable
2,252,744

 
7.59

 
3.56
 
9.9

Additional Information Regarding Options Outstanding
Additional information regarding standard options outstanding as of December 31, 2015 is as follows:
 
 
Options Outstanding
 
Options Exercisable
Range of
Exercise
  Prices
 
Number
Outstanding
 
Weighted
Average
Remaining
Contractual
Life (Years)
 
Weighted
Average
Exercise
Price
 
Number
Exercisable
 
Weighted
Average
Exercise
Price
$2.70 - $3.72
 
17,938

 
3.19
 
$
2.75

 
17,938

 
$
2.75

3.85 - 3.85
 
600,000

 
3.87
 
3.85

 
600,000

 
3.85

4.24 - 6.12
 
493,241

 
2.92
 
5.94

 
464,786

 
5.93

6.23 - 8.09
 
410,349

 
5.35
 
7.52

 
167,009

 
6.85

8.18 - 9.19
 
440,433

 
4.35
 
8.90

 
236,822

 
8.85

9.20 - 9.20
 
44,300

 
2.54
 
9.20

 
44,300

 
9.20

9.53 - 9.53
 
810,000

 
4.18
 
9.53

 
384,374

 
9.53

9.65 - 12.20
 
392,427

 
5.48
 
11.50

 
138,690

 
11.49

12.22 - 15.12
 
287,845

 
5.08
 
13.16

 
98,825

 
14.32

16.57 - 16.57
 
100,000

 
1.74
 
16.57

 
100,000

 
16.57

$2.70 - $16.57
 
3,596,533

 
4.23
 
$
8.45

 
2,252,744

 
$
7.59

Additional information regarding market condition based stock options outstanding as of December 31, 2015 is as follows:
 
Options Outstanding
 
Options Exercisable
Range of
Exercise
Prices
Number
Outstanding
 
Weighted
Average
Remaining
Contractual
Life (Years)
 
Weighted
Average
Exercise
Price
 
Number
Exercisable
 
Weighted
Average
Exercise
Price
$8.09 - $11.94
200,000

 
5.92
 
$
9.05

 

 
$

Schedule of Restricted Stock Units Activity
RSU activity for the years ended December 31, 2015, 2014, and 2013 was as follows:
 
Number of Shares    
 
Weighted
Average
Grant Date Fair Value    
 
Fair Value
of Released
RSU’s (In thousands)    
Outstanding at January 1, 2013
708,651

 
 
 
 
Awarded
294,150

 
$
7.12

 
 
Released
(303,882
)
 
 
 
$
2,806

Forfeited
(30,863
)
 
 
 
 
Outstanding at December 31, 2013
668,056

 
 
 
 
Awarded
265,630

 
11.35

 
 
Released
(317,970
)
 
 
 
3,491

Forfeited
(50,825
)
 
 
 
 
Outstanding at December 31, 2014
564,891

 
 
 
 
Awarded
281,290

 
8.16

 
 
Released
(299,277
)
 
 
 
2,626

Forfeited
(59,481
)
 
 
 
 
Outstanding at December 31, 2015
487,423

 
 
 
 
Schedule of Information Regarding Restricted Stock Units Outstanding
Information regarding RSU’s at December 31, 2015, 2014, and 2013 is summarized below:
 
Number of Shares      
 
Weighted
Average
Remaining
Contractual Life (years)     
 
Aggregate
Intrinsic
Value(In millions)  
 
Fair Value(In millions)  
December 31, 2013
 
 
 
 
 
 
 
RSUs outstanding
668,056

 
0.91
 
$
6.9

 
$
6.9

RSUs vested and expected to vest using estimated forfeiture rates
583,711

 
0.89
 
6.1

 
 
December 31, 2014
 
 
 
 
 
 
 
RSUs outstanding
564,891

 
0.84
 
$
5.3

 
$
5.3

RSUs vested and expected to vest using estimated forfeiture rates
502,411

 
0.80
 
4.8

 
 
December 31, 2015
 
 
 
 
 
 
 
RSUs outstanding
487,423

 
0.90
 
$
5.7

 
$
5.7

RSUs vested and expected to vest using estimated forfeiture rates
414,934

 
0.87
 
4.8

 
 
Schedule of Restricted Stock Awards Activity
Restricted stock award activity for the years ended December 31, 2015, 2014, and 2013 was as follows:
 
Number of Shares    
 
Weighted
Average
Grant Date
Fair Value
 
Total
Fair
Value of
Awards
Released
(In thousands)
Outstanding at January 1, 2013
44,000

 
$
5.34

 
 
Awarded
44,000

 
14.09

 
 
Released
(44,000
)
 
5.34

 
$
676

Forfeited

 
 
 
 
Outstanding at December 31, 2013
44,000

 
14.09

 
 
Awarded
35,364

 
10.97

 
 
Released
(44,000
)
 
14.09

 
483

Forfeited

 
 
 
 
Outstanding at December 31, 2014
35,364

 
10.97

 
 
Awarded
21,356

 
12.26

 
 
Released
(35,364
)
 
10.97

 
434

Forfeited

 
 
 
 
Outstanding at December 31, 2015
21,356

 
12.26

 
 
Schedule of Stock Options, Market Condition Based Stock Options and Employee Stock Purchase Plan, Valuation Assumptions
The assumptions used to value option grants under the Company’s stock plans are as follows:
 
Standard Stock Options    
 
2015
 
2014
 
2013
Expected life (in years)
4.7

 
4.7

 
4.9

Interest rate
1.4
%
 
1.4
%
 
0.8
%
Volatility
56
%
 
57
%
 
70
%
Dividend yield
%
 
%
 
%
 
Market Condition Based Stock Options
 
2015
 
2014
Expected life (in years)
7.0

 
7.0

Interest rate
1.9
%
 
2.2
%
Volatility
65
%
 
66
%
Dividend yield
%
 
%
 
Employee Stock Purchase Plan    
 
2015
 
2014
 
2013
Expected life (in years)
0.5

 
0.5

 
0.5

Interest rate
0.1
%
 
0.1
%
 
0.1
%
Volatility
48
%
 
43
%
 
67
%
Dividend yield
%
 
%
 
%
Schedule of Stock-Based Compensation
Total stock-based compensation recognized in the consolidated statements of income is as follows:
 
Year Ended December 31,
 
2015
 
2014
 
2013
Income Statement Classifications
(In thousands)
Sales and marketing
$
1,116

 
$
1,117

 
$
747

Research and development
1,303

 
1,267

 
1,040

General and administrative
3,051

 
2,911

 
2,857

Total
$
5,470

 
$
5,295

 
$
4,644