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M. SHARE-BASED COMPENSATION (Tables)
12 Months Ended
Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Fair value of employee stock options

The Company estimates the fair value of employee stock options at the date of the grant using the Black-Scholes option-pricing model with the following assumptions:

 

    2013   2012   2011
Expected volatility   52 to 70%   70.0%   70.0%
Risk-free interest rate   0.96% to 2.97%   1.01%   2.32%
Expected term (years)   6.25   6.25   6.25
Expected dividend yield   -   -   -
Estimated forfeitures   7.5%   10%   13%
Schedule of employee stock-based compensation expenses

Employee share-based compensation expenses recognized for the years ended December 31, were as follows:

 

    2013     2012     2011  
    (in thousands)  
Cost of goods sold   $ 56     $ 7     $ 35  
Research and development     53       8       50  
Sales and marketing     52       9       58  
General and administrative     907       137       420  
Total share-based compensation expense   $ 1,068     $ 161     $ 563  

 

Summary of option activity

The following is a summary of option activity:

 

    Number of shares     Exercise price   Weighted average exercise price  
    (in thousands, except price data)  
Outstanding, January 1, 2011     288     3.00 - 7.50     5.838  
Granted     124     6.00     6.000  
Exercised     (3 )   3.00 - 6.00     6.000  
Forfeited     (25 )   6.00     6.000  
Expired     (7 )   4.50 - 6.00     5.973  
Outstanding, December 31, 2011     377     3.00 - 7.50     5.877  
Granted     88     6.00     6.000  
Exercised     (1 )   6.00 - 7.50     6.291  
Forfeited     (19 )   6.00     6.000  
Expired     (26 )   3.00 - 7.50     5.301  
Outstanding, December 31, 2012     419     3.00 - 7.50     5.936  
Granted     1,099     7.50 - 12.90     9.214  
Exercised     (29 )   4.50 - 6.00     5.875  
Forfeited     (16 )   3.00 - 7.50     7.099  
Expired     (5 )   3.00 - 7.50     5.986  
Outstanding, December 31, 2013     1,468     3.00 - 12.90     8.379  
Exercisable, December 31, 2013     275     3.00 - 7.50     5.915  
Vested and expected to vest     1,325     3.00 - 12.90     8.287  
Options outstanding

The following table summarizes information about the options outstanding at December 31, 2013:

 

Range of exercise prices   Number of shares outstanding     Weighted average exercise price     Aggregate intrinsic value     Weighted average remaining contractual life (years)     Number of shares exercisable     Weighted average exercise price     Aggregate intrinsic value     Weighted average remaining contractual life (years)  
    (in thousands, except price data)  
$3.00 - $6.00     371       5.914     $ 3,373       6.59       270       5.881     $ 2,463       6.22  
7.50 - 12.90     1,097       9.213       6,360       9.49       5       7.500       43       1.77  
Total     1,468       8.379     $ 9,733       8.76       275       5.915     $ 2,506       6.13  
Number and weighted average fair value of options granted

The number and weighted average fair value of options granted in 2013, 2012 and 2011 is as follows:

 

2013     2012     2011  
Shares     Weighted average fair value     Shares     Weighted average fair value     Shares     Weighted average fair value  
(shares in thousands)  
  1,099     $ 4.9986       88     $ 4.9260       124     $ 0.3930