Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2014
Equity [Abstract]  
Summary of Option Activity

A summary of stock option activity for the year ended December 31, 2014 is as follows (shares and aggregate intrinsic value in thousands):

 

     Shares      Wtd. Avg.
Exercise Price
     Wtd. Avg.
Remaining
Contractual Life
     Aggregate
Intrinsic
Value
 

Outstanding at December 31, 2013

     893       $ 0.72         

Granted during fiscal year 2014

     280       $ 1.31         

Exercised during fiscal year 2014

     (174 )     $ 0.78         

Expired during fiscal year 2014

     (12 )     $ 3.00         

Forfeited during fiscal year 2014

     (7 )     $ 0.73         
  

 

 

          

Outstanding at December 31, 2014

  980    $ 0.85      4.81 years    $ 297   
  

 

 

          

Vested and expected to vest

  922    $ 0.83      4.69 years    $ 292   
  

 

 

          

Exercisable at December 31, 2014

  568    $ 0.65      3.49 years    $ 250   
  

 

 

          
Summary of Non-Vested Options

A summary of the status of the Company’s non-vested options at December 31, 2014, and changes during the year then ended are presented below (shares in thousands):

 

     Shares      Weighted-average
grant-date fair value
 

Non-vested at December 31, 2013

     276       $ 0.58   

Granted

     280       $ 0.93   

Vested

     (137 )     $ 0.58   

Forfeited

     (7 )     $ 0.58   
  

 

 

    

Non-vested at December 31, 2014

  412    $ 0.82   
  

 

 

    

 

Summary of Share-Based Compensation Expense

The following table summarizes share-based compensation expense for the years ended December 31 (in thousands):

 

     2014      2013      2012  

Selling, general and administrative:

        

Non-employee directors

   $ 19       $ 11       $ 18   

Officers

     39         40         63   

Others

     28         18         28   
  

 

 

    

 

 

    

 

 

 

Total SG&A

  86      69      109   

Research and development

  —        40      122   
  

 

 

    

 

 

    

 

 

 

Total share-based compensation expense before taxes

  86      109      231   

Related deferred income tax benefits

  —        —        —     
  

 

 

    

 

 

    

 

 

 

Share-based compensation expense

$ 86    $ 109    $ 231