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Goodwill (Details) $ in Thousands	9 Months Ended
	Jan. 30, 2016 USD ($)
Goodwill
Balance as of May 2, 2015	$ 5,269
Acquisition, net of cash required	213
Foreign currency translation	(166)
Balance as of January 30, 2016	5,316
Live Events
Goodwill
Balance as of May 2, 2015	2,321
Acquisition, net of cash required	0
Foreign currency translation	(60)
Balance as of January 30, 2016	2,261
Commerical
Goodwill
Balance as of May 2, 2015	721
Acquisition, net of cash required	0
Foreign currency translation	(4)
Balance as of January 30, 2016	717
Transportation
Goodwill
Balance as of May 2, 2015	91
Acquisition, net of cash required	0
Foreign currency translation	(58)
Balance as of January 30, 2016	33
International
Goodwill
Balance as of May 2, 2015	2,136
Acquisition, net of cash required	213
Foreign currency translation	(44)
Balance as of January 30, 2016	$ 2,305

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ 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 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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- Definition

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+ References

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- Definition

Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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