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Goodwill (Details) $ in Thousands	9 Months Ended
	Jan. 26, 2019 USD ($)
Goodwill
Balance as of April 28, 2018	$ 8,264
Foreign currency translation	(296)
Balance as of January 26, 2019	7,968
Live Events
Goodwill
Balance as of April 28, 2018	2,295
Foreign currency translation	(14)
Balance as of January 26, 2019	2,281
Commerical
Goodwill
Balance as of April 28, 2018	3,344
Foreign currency translation	(99)
Balance as of January 26, 2019	3,245
Transportation
Goodwill
Balance as of April 28, 2018	67
Foreign currency translation	(14)
Balance as of January 26, 2019	53
International
Goodwill
Balance as of April 28, 2018	2,558
Foreign currency translation	(169)
Balance as of January 26, 2019	$ 2,389

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
-Subparagraph (a)
-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

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

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X

- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits 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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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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