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Revenue Recognition Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended
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Aug. 03, 2019 | Jul. 28, 2018
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | $ 180,256 | $ 154,188
Transferred at Point in Time |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 76,307 | 67,151
Transferred over Time |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 103,949 | 87,037
Commercial |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 44,035 | 30,569
Commercial | Transferred at Point in Time |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 27,703 | 24,583
Commercial | Transferred over Time |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 16,332 | 5,986
Live Events |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 59,306 | 49,472
Live Events | Transferred at Point in Time |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 9,120 | 6,802
Live Events | Transferred over Time |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 50,186 | 42,670
High School Park and Recreation |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 30,465 | 28,120
High School Park and Recreation | Transferred at Point in Time |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 22,599 | 16,998
High School Park and Recreation | Transferred over Time |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 7,866 | 11,122
Transportation |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 19,018 | 17,157
Transportation | Transferred at Point in Time |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 6,697 | 7,232
Transportation | Transferred over Time |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 12,321 | 9,925
International |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 27,432 | 28,870
International | Transferred at Point in Time |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 10,188 | 11,536
International | Transferred over Time |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 17,244 | 17,334
Unique Configuration |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 92,157 | 76,747
Unique Configuration | Commercial |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 12,965 | 3,049
Unique Configuration | Live Events |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 45,587 | 38,921
Unique Configuration | High School Park and Recreation |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 6,030 | 8,943
Unique Configuration | Transportation |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 11,897 | 9,618
Unique Configuration | International |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 15,678 | 16,216
Limited Configuration |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 75,265 | 66,093
Limited Configuration | Commercial |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 27,235 | 23,867
Limited Configuration | Live Events |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 7,713 | 5,818
Limited Configuration | High School Park and Recreation |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 23,800 | 18,547
Limited Configuration | Transportation |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 6,587 | 7,083
Limited Configuration | International |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 9,930 | 10,778
Service and Other |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 12,834 | 11,348
Service and Other | Commercial |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 3,835 | 3,653
Service and Other | Live Events |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 6,006 | 4,733
Service and Other | High School Park and Recreation |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 635 | 630
Service and Other | Transportation |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | 534 | 456
Service and Other | International |  |
Disaggregation of Revenue [Line Items] |  |
Disaggregated revenue | $ 1,824 | $ 1,876

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