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Goodwill and Intangible Assets -Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 28, 2018 | Apr. 29, 2017 | Apr. 30, 2016
Goodwill |  |  |
Impairment of intangible assets | $ 0 | $ 830 | $ 0
Amortization of Intangible Assets | $ 1,330 | $ 2,546 | $ 295
Commerical |  |  |
Goodwill |  |  |
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount | 20.00% |  |
Live Events |  |  |
Goodwill |  |  |
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount | 2.00% |  |
High School Park and Recreation |  |  |
Goodwill |  |  |
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount | 20.00% |  |
Transportation |  |  |
Goodwill |  |  |
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount | 20.00% |  |
International |  |  |
Goodwill |  |  |
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount | 20.00% |  |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 + Details
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- Definition Percentage of fair value of reporting unit in excess of carrying amount. + References No definition available. + Details
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