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Significant Accounting Policies (Tables)
 3 Months Ended
Jul. 31, 2020
Accounting Policies [Abstract]  
Summary of the Calculation of Earnings per Share, Basic and Diluted
 
Three Months Ended
July 31,
 
 
 
2020
 
2019
 
 
Basic and diluted net (loss) income per share computation (dollars in thousands):
 

 
 

 
 
Net income (loss) attributable to common stockholders
$
75

 
$
(641
)
 
 
Weighted Average common shares – basic
12,727,275

 
11,619,538

 
 
Basic net income (loss) per share
$
0.01

 
$
(0.06
)
 
 
 
 
 
 
 
 
Diluted income (loss) per share computation:
 

 
 

 
 
Net income (loss) attributable to common stockholders
$
75

 
$
(641
)
 
 
Income (loss) available to common stockholders
$
75

 
$
(641
)
 
 
 
 
 
 
 
 
Weighted Average common shares
12,727,275

 
11,619,538

 
 
Incremental shares from assumed exercise of stock options
1,504,366

 
—

 
 
Adjusted weighted average share – diluted
14,231,641

 
11,619,538

 
 
 
 
 
 
 
 
Diluted net income (loss) per share
$
0.01

 
$
(0.06
)
 
 
Summary of Antidilutive Securities Excluded from Earnings Per Share Calculations
The following table reflects the total potential share-based instruments outstanding at July 31, 2020 and 2019 that could have an effect on the future computation of dilution per common share, had their effect not been anti-dilutive:
 
July 31,
 
2020
 
2019
Stock options
2,276,263

 
2,374,875

Warrants
—

 
1,669,773

 
 
 
 
Total common stock equivalents
2,276,263

 
4,044,648