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Distribution of Stock-Based Compensation Plan Expense (Tables)
6 Months Ended
Sep. 30, 2016
Distribution Of Stock-based Compensation Plan Expense Tables  
Schedule Of Stock-Based Compensation Expense By Statement Of Operations Line Item

The following table summarizes stock-based compensation expense (in thousands):

      Three Months Ended     Six Months Ended
      September 30,     September 30,
      2016     2015     2016     2015
Cost of service revenue   $ 440    $ 263    $ 800    $ 482 
Cost of product revenue                
Research and development     863      726      1,750      1,257 
Sales and marketing     1,751      1,422      3,666      2,619 
General and administrative     1,454      1,106      3,343      2,181 
Total stock-based compensation expense                         
     related to employee stock options and                         
     employee stock purchases, pre-tax     4,508      3,517      9,559      6,539 
                         
Tax benefit                
Stock-based compensation expense                         
     related to employee stock options and                         
     employee stock purchases, net of tax   $ 4,508    $ 3,517    $ 9,559    $ 6,539