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Net Loss Per Share Applicable to Common Stockholders (Tables)
 6 Months Ended
Oct. 31, 2017
Earnings Per Share [Abstract]  
Computations of Loss per Share Applicable to Common Stockholders
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, 2017 and 2016, respectively (in thousands, except net loss per share data):
 
Three Months Ended October 31,
 
Six Months Ended October 31,
 
2017
 
2016
 
2017
 
2016
Net loss
$
(55
)
 
$
(4,134
)
 
$
(2,371
)
 
$
(9,239
)
Basic and diluted loss per share
$
0.00

 
$
(0.05
)
 
$
(0.03
)
 
$
(0.11
)
Basic and diluted weighted average number of shares outstanding
85,630

 
82,930

 
85,147

 
82,572

Potentially dilutive securities (1):
 
 
 
 
 
 
 
Outstanding stock options
504

 
363

 
496

 
236

Restricted shares
1,002

 
826

 
1,423

 
440

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