v3.8.0.1
6. STOCK BASED COMPENSATION (Tables)
3 Months Ended
Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of stock-based compensation expense
   Three Months Ended
March 31,
 
   2018   2017 
Research and development  $112   $88 
General and administrative   400    852 
Selling and Marketing   34    270 
   $546   $1,210 
Schedule of stock option activity
   

Number of

Shares

  

Weighted-

Average

Exercise

Prices

  

Weighted-
Average

Remaining

Contractual

Term (In Years)

   Intrinsic
Value
 
 Outstanding at January 1, 2018    2,141   $7.03           
 Granted    335   $5.64           
 Outstanding at March 31, 2018    2,476   $6.84    8.3   $493 
 Exercisable at March 31, 2018    1,105   $7.15    7.71   $119 
Schedule of restricted stock option activity
   

Number of

Shares

  

Weighted-

Average

Grant Date
Fair Value

 
 Outstanding at January 1, 2018    121   $6.90 
 Granted    200   $5.64 
 Vested    (5)  $7.01 
 Outstanding non-vested shares at March 31, 2018    316   $6.10