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Stockholders Equity (Deficit) (Tables)
 12 Months Ended
Dec. 31, 2015
Equity [Abstract]  
Summary of Stock Option Plans Activity

A summary of the Plans’ stock option activity is as follows:

 

 

 

Number of

Shares

 

 

Weighted-

Average

Exercise Price

Per Share

 

 

Weighted-

Average

Remaining

Contractual

Life (Years)

 

 

Aggregate

Intrinsic Value

 

Balance at January 1, 2014

 

 

349,046

 

 

$

3.14

 

 

7.5

 

 

 

 

 

Granted

 

 

314,685

 

 

 

4.01

 

 

 

 

 

 

 

 

 

Exercised

 

 

(9,909

)

 

 

2.17

 

 

 

 

 

 

$

—

 

Forfeited

 

 

(54,739

)

 

 

2.15

 

 

 

 

 

 

 

 

 

Expired

 

 

(3,506

)

 

 

2.98

 

 

 

 

 

 

 

 

 

Balance at December 31, 2014

 

 

595,577

 

 

 

3.71

 

 

 

7.8

 

 

$

—

 

Granted

 

 

171,408

 

 

 

6.11

 

 

 

 

 

 

 

 

 

Exercised

 

 

(13,960

)

 

 

2.50

 

 

 

 

 

 

$

86,070

 

Forfeited

 

 

(16,380

)

 

 

8.57

 

 

 

 

 

 

 

 

 

Balance at December 31, 2015

 

 

736,645

 

 

 

4.18

 

 

 

7.5

 

 

$

947,794

 

Vested and expected to vest at December 31, 2015

 

 

687,488

 

 

 

4.01

 

 

 

7.3

 

 

$

723,894

 

Exercisable at December 31, 2014

 

 

294,851

 

 

 

3.42

 

 

 

6.5

 

 

$

—

 

Exercisable at December 31, 2015

 

 

410,649

 

 

 

3.55

 

 

 

6.3

 

 

$

641,115