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Net Loss Per Share Applicable to Common Stockholders
 9 Months Ended
Jan. 31, 2017
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 nine months ended January 31, 2017 and 2016, respectively (in thousands, except net loss per share data):
 
Three Months Ended January 31,
 
Nine Months Ended January 31,
 
2017
 
2016
 
2017
 
2016
Net loss
$
(2,728
)
 
$
(3,114
)
 
$
(11,967
)
 
$
(18,210
)
Basic and diluted loss per share
$
(0.03
)
 
$
(0.04
)
 
$
(0.14
)
 
$
(0.23
)
Basic and diluted weighted average number of shares outstanding
83,348

 
81,096

 
82,830

 
80,649

Potentially dilutive securities (1):
 
 
 
 
 
 
 
Outstanding stock options
360

 
168

 
279

 
224

Restricted shares
963

 
17

 
677

 
50

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