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Stockholders Equity (Tables)
 6 Months Ended
Jun. 30, 2016
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 December 31, 2015

 

 

736,645

 

 

$

4.18

 

 

7.5

 

 

$

947,794

 

Granted

 

 

359,125

 

 

2.51

 

 

 

 

 

 

 

 

 

Exercised

 

 

(996

)

 

2.15

 

 

 

 

 

 

 

 

 

Forfeited

 

 

(38,943

)

 

5.49

 

 

 

 

 

 

 

 

 

Balance at June 30, 2016

 

 

1,055,831

 

 

3.56

 

 

 

8.0

 

 

$

343,795

 

Vested and expected to vest at June 30, 2016

 

 

971,922

 

 

3.44

 

 

7.8

 

 

$

323,258

 

Exercisable at June 30, 2016

 

 

510,944

 

 

3.44

 

 

6.7

 

 

$

204,409