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Distribution of Stock-Based Compensation Plan Expense (Tables)
9 Months Ended
Dec. 31, 2015
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,
      2015     2014     2015     2014
Cost of service revenue   $ 346    $ 201    $ 828    $ 476 
Cost of product revenue                
Research and development     850      420      2,107      1,049 
Sales and marketing     1,689      966      4,308      2,620 
General and administrative     1,778      1,047      3,959      2,344 
Total stock-based compensation expense                         
     related to employee stock options and                         
     employee stock purchases, pre-tax     4,663      2,634      11,202      6,489 
                         
Tax benefit                
Stock-based compensation expense                         
     related to employee stock options and                         
     employee stock purchases, net of tax   $ 4,663    $ 2,634    $ 11,202    $ 6,489