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6. STOCK-BASED COMPENSATION (Tables)
 6 Months Ended
Jun. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of options activity

As of June 30, 2018, we had outstanding options to acquire 553,282 shares of our common stock, of which options to acquire 100,211 shares were exercisable. The following summarizes all of our option transactions for the six months ended June 30, 2018:

 

Outstanding Options

Under the 2006 Plan

   Shares    

Weighted Average

Exercise price

Per Common Share

    

Weighted Average

Remaining

Contractual Life

(in years)

    

Aggregate

Intrinsic

Value

  
                         
Balance, December 31, 2017     420,149     $ 6.82                  
Granted     133,133       10.05                  
Balance, June 30, 2018     553,282       7.05       7.71     $ 4,398,199  
Exercisable at June 30, 2018     100,211       4.39       4.28     $ 1,063,418  
Schedule of RSA activity

The following summarizes all unvested RSA’s activities during the six months ended June 30, 2018:

 

          Weighted-Average        
          Remaining        
          Contractual     Weighted-Average  
    RSA's     Term (Years)     Fair Value  
RSA's unvested at December 31, 2017     447,351             $ 6.17  
Changes during the period                        
Granted     512,160             $ 10.30  
Vested     (669,107 )           $ 7.93  
Forfeited or Cancelled     (1,150 )           $ 6.00  
RSA's unvested at June 30, 2018     289,254       0.89     $ 9.67