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Share-Based Compensation (Tables)
 3 Months Ended
Mar. 31, 2017
Share-based Compensation Tables  
Stock-based employee compensation expense

The following table summarizes the amount of share-based compensation expense by line item in the statements of operations:

      Three Months Ended
      March 31,
(in thousands)     2017     2016
Cost of product revenue   $ 8    $ 10 
Research and development expense     105      83 
Sales, marketing, general and administrative expense     197      207 
    $ 310    $ 300 

 

 

 

 

 

 
Options activity and positions

The following table summarizes shares, weighted-average exercise price, weighted-average remaining contractual term and aggregate intrinsic value of options outstanding and options exercisable as of March 31, 2017:

              Weighted-      
          Weighted-   Average      
          Average   Remaining     Aggregate
          Exercise   Contractual     Intrinsic
Options   Shares     Price   Term (years)     Value
Outstanding as of March 31, 2017   5,236,000    $ 3.31    7.8    $ 2,702,000 
                     
Exercisable as of March 31, 2017   2,000,000    $ 5.43    5.7    $ 700,000