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Segment Information (Tables)
 3 Months Ended
Jul. 31, 2019
Segment Reporting [Abstract]  
Segment Information
The following tables provide financial information by business segments for the three months ended July 31, 2019 and 2018 (in thousands):
 
Domestic
Operations
 
International
Operations
 
Corporate /
Eliminations
 
Total
Three months ended July 31, 2019
 
 
 
 
 
 
 
Revenues from external customers
$
29,287

 
$
10,049

 
$
—

 
$
39,336

Intersegment revenues
2,179

 
842

 
(3,021
)
 
—

Earnings (loss) before income taxes
$
1,560

 
$
608

 
$
(1,503
)
 
$
665

Three months ended July 31, 2018
 
 
 
 
 
 
 
Revenues from external customers
$
36,070

 
$
6,082

 
$
—

 
$
42,152

Intersegment revenues
462

 
726

 
(1,188
)
 
—

Earnings (loss) before income taxes
$
3,108

 
$
449

 
$
(1,664
)
 
$
1,893