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Goodwill (Tables) | 9 Months Ended
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Jan. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | The changes in the carrying amount of goodwill related to each reportable segment for the nine months ended January 31, 2015 were as follows:
| Live Events |  | Commercial |  | Transportation |  | International |  | Total
Balance as of April 26, 2014 | $ | 2,381 |  |  | $ | 723 |  |  | $ | 129 |  |  | $ | 1,325 |  |  | $ | 4,558 |
Disposal of automated rigging systems for theatre applications | (22 | ) |  | — |  |  | — |  |  | — |  |  | (22 | )
Acquisition, net of cash required | — |  |  | — |  |  | — |  |  | 1,244 |  |  | 1,244 |
Foreign currency translation | (55 | ) |  | (3 | ) |  | (54 | ) |  | (414 | ) |  | (526 | )
Balance as of January 31, 2015 | $ | 2,304 |  |  | $ | 720 |  |  | $ | 75 |  |  | $ | 2,155 |  |  | $ | 5,254 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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