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Net Loss Per Share Applicable to Common Stockholders
 6 Months Ended
Oct. 31, 2016
Earnings Per Share [Abstract]  
Net Loss Per Share Applicable to Common Stockholders
Net Loss Per Share
The following table sets forth the computations of net loss per share applicable to common stockholders for the three and six months ended October 31, 2016 and 2015, respectively (in thousands, except net loss per share data):
 
Three Months Ended October 31,
 
Six Months Ended October 31,
 
2016
 
2015
 
2016
 
2015
Net loss
$
(4,134
)
 
$
(4,852
)
 
$
(9,239
)
 
$
(15,096
)
Basic and diluted loss per share
$
(0.05
)
 
$
(0.06
)
 
$
(0.11
)
 
$
(0.19
)
Basic and diluted weighted average number of shares outstanding
82,930

 
80,678

 
82,572

 
80,426

Potentially dilutive securities (1):
 
 
 
 
 
 
 
Outstanding stock options
363

 
212

 
236

 
266

Restricted shares
826

 
11

 
440

 
38

(1)
The impact of potentially dilutive securities on earnings per share is anti-dilutive in a period of net loss.