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Summary of Significant Accounting Policies (Share-Based Compensation) (Tables)
12 Months Ended
Dec. 31, 2014
Summary Of Significant Accounting Policies Share-based Compensation Tables  
Stock-based employee compensation expense

The following table shows the amount of share-based compensation expense included in the statements of operations for each period shown:

      Year Ended December 31,
      2014     2013
Cost of product revenue   $   $ 1,000 
Cost of contract revenue     28,000      19,000 
Research and development expense     34,000      466,000 
Sales, marketing, general and administrative expense     651,000      1,120,000 
    $ 713,000    $ 1,606,000