Segment Disclosure - Net Income by Segment (Details) $ in Thousands	3 Months Ended
	Jul. 30, 2016 USD ($) segment	Aug. 01, 2015 USD ($)
Segment Reporting Information
Number of business units | segment	5
Net sales	$ 157,146	$ 150,221
Contribution margin	23,808	21,237
Depreciation and amortization
Depreciation and amortization	4,591	4,055
Non-allocated operating expenses:
General and administrative	8,783	8,170
Product design and development	7,043	6,968
Operating income	7,982	6,099
Nonoperating income (expense):
Interest income	205	298
Interest expense	(42)	(62)
Other income (expense), net	(94)	(443)
Income before income taxes	8,051	5,892
Income tax expense	2,512	2,116
Net income	5,539	3,776
Commerical
Segment Reporting Information
Net sales	36,254	43,210
Contribution margin	4,496	6,113
Depreciation and amortization
Depreciation and amortization	1,567	1,257
Live Events
Segment Reporting Information
Net sales	60,633	47,922
Contribution margin	8,875	6,183
Depreciation and amortization
Depreciation and amortization	1,280	1,321
High School Park and Recreation [Member]
Segment Reporting Information
Net sales	27,617	18,959
Contribution margin	6,999	3,775
Depreciation and amortization
Depreciation and amortization	438	490
Transportation
Segment Reporting Information
Net sales	14,286	13,767
Contribution margin	3,601	3,180
Depreciation and amortization
Depreciation and amortization	322	329
International
Segment Reporting Information
Net sales	18,356	26,363
Contribution margin	(163)	1,986
Depreciation and amortization
Depreciation and amortization	329	256
Unallocated
Depreciation and amortization
Depreciation and amortization	$ 655	$ 402