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Stockholders' Equity (Tables)
 6 Months Ended
Aug. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Total Stock-Based Compensation Expense
Total stock-based compensation expense has been classified as follows in our condensed consolidated statements of income (in thousands):
 
Three Months Ended August 31,
 
Six Months Ended August 31,
 
2017
 
2016
 
2017
 
2016
Cost of revenue
$
496

 
$
338

 
$
922

 
$
636

Research and development
3,121

 
2,608

 
5,808

 
5,072

Sales and marketing
3,400

 
1,943

 
5,534

 
3,791

General and administrative
2,611

 
3,007

 
4,747

 
6,334

 
$
9,628

 
$
7,896

 
$
17,011

 
$
15,833
Summary of Common Stock Repurchases
The following table summarizes our common stock repurchases for the periods presented (in thousands, except per share data):
 
Three Months Ended August 31,
 
Six Months Ended August 31,
 
2017
 
2016
 
2017
 
2016
Total number of shares repurchased
—

 
464

 
331

 
482

Dollar amount of shares repurchased
$
—

 
$
6,961

 
$
6,546

 
$
7,241

Average price paid per share
$
—

 
$
14.99

 
$
19.75

 
$
15.03

Remaining amount authorized as of the period end
$
16,642

 
$
23,543

 
$
16,642

 
$
23,543