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14. STOCK BASED COMPENSATION (Tables)
12 Months Ended
Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Option activity
   Years Ended December 31, 
   2016   2015 
   Number
of Shares
   Weighted
Average
Exercise
Price
   Number
of Shares
   Weighted
Average
Exercise
Price
 
Outstanding at beginning of year   240   $4.18    241   $6.91 
Expired           (1)   867.24 
Outstanding at end of year   240   $4.18    240   $4.18 
Options exercisable at end of year   240   $4.18    164   $4.18 
Stock options by exercise price range
   Options Outstanding  Options Exercisable
Range of
Exercise Prices
  Number
Outstanding
  Weighted
Average
Remaining
Contractual
Life (yrs.)
  Weighted
Average
Exercise
Price
  Number
Exercisable
  Weighted
Average
Exercise
Price
                
$3.74  229  6.47  $3.74  229  $3.74
$12.90  11  4.59  $12.90  11  $12.90
Unvested restricted stock activity
   Number of
Shares
   Weighted
Average
Grant Date
Fair Value
Per Share
 
Unvested at December 31, 2013   472   $5.07 
Issued   155   $15.23 
Vested   (227)  $5.79 
Canceled   (10)  $4.30 
Unvested at December 31, 2014   390   $8.71 
Issued   307   $10.16 
Vested   (220)  $7.94 
Canceled   (14)  $10.08 
Unvested at December 31, 2015   463   $10.00 
Issued   742   $5.24 
Vested   (250)  $9.01 
Canceled   (25)  $6.24 
Unvested at December 31, 2016   930   $6.57 
Stock-based compensation expense
   Years Ended December 31, 
   2016   2015   2014 
Employees  $2,173   $1,694   $1,493 
Non-employees   443    325    345 
Total stock-based compensation expense  $2,616   $2,019   $1,838