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Goodwill (Tables)
 3 Months Ended
Jul. 29, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
The changes in the carrying amount of goodwill related to each reportable segment for the three months ended July 29, 2017 were as follows: 
 
Live Events
 
Commercial
 
Transportation
 
International
 
Total
Balance as of April 29, 2017
$
2,274

 
$
3,199

 
$
45

 
$
2,294

 
$
7,812

Foreign currency translation
33

 
223

 
32

 
171

 
459

Balance as of July 29, 2017
$
2,307

 
$
3,422

 
$
77

 
$
2,465

 
$
8,271