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Distribution of Stock-Based Compensation Plan Expense (Tables)
9 Months Ended
Dec. 31, 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     Nine Months Ended
      December 31,     December 31,
      2016     2015     2016     2015
Cost of service revenue   $ 538    $ 346    $ 1,338    $ 828 
Cost of product revenue                
Research and development     1,061      850      2,811      2,107 
Sales and marketing     2,452      1,689      6,118      4,308 
General and administrative     2,020      1,778      5,363      3,959 
Total stock-based compensation expense                         
     related to employee stock options and                         
     employee stock purchases, pre-tax     6,071      4,663      15,630      11,202 
                         
Tax benefit                
Stock-based compensation expense                         
     related to employee stock options and                         
     employee stock purchases, net of tax   $ 6,071    $ 4,663    $ 15,630    $ 11,202