Segment Reporting - Net Income by Segment (Details) $ in Thousands	3 Months Ended								12 Months Ended
	May 02, 2020 USD ($)	Feb. 01, 2020 USD ($)	Nov. 02, 2019 USD ($)	Aug. 03, 2019 USD ($)	Apr. 27, 2019 USD ($)	Jan. 26, 2019 USD ($)	Oct. 27, 2018 USD ($)	Jul. 28, 2018 USD ($)	May 02, 2020 USD ($) segment	Apr. 27, 2019 USD ($)	Apr. 28, 2018 USD ($)
Segment Reporting Information
Number of business units | segment									5
Net sales	$ 126,108	$ 127,657	$ 174,911	$ 180,256	$ 127,755	$ 115,069	$ 172,692	$ 154,188	$ 608,932	$ 569,704	$ 610,530
Gross profit	28,626	24,482	40,087	45,505	24,421	24,869	42,757	38,247	138,700	130,294	145,669
Non-allocated operating expenses:
General and administrative									35,193	34,817	34,919
Product design and development									37,772	35,557	35,530
Operating income									(167)	(4,728)	12,460
Nonoperating income (expense):
Interest income									805	1,031	723
Interest expense									(106)	(160)	(217)
Other (expense) income, net									(541)	(1,087)	(537)
Income before income taxes									(9)	(4,944)	12,429
Income tax (benefit) expense									(500)	(3,986)	6,867
Net income (loss)	$ (1,079)	$ (12,734)	$ 7,274	$ 7,030	$ (10,819)	$ (3,319)	$ 8,606	$ 4,574	491	(958)	5,562
Depreciation, amortization, and impairment									17,718	18,635	17,784
Commerical
Segment Reporting Information
Net sales									152,627	148,833	134,535
Nonoperating income (expense):
Depreciation, amortization, and impairment									3,682	4,795	6,199
Live Events
Segment Reporting Information
Net sales									196,591	170,952	236,333
Nonoperating income (expense):
Depreciation, amortization, and impairment									5,605	5,194	4,783
High School Park and Recreation
Segment Reporting Information
Net sales									96,414	91,187	87,627
Nonoperating income (expense):
Depreciation, amortization, and impairment									2,025	1,965	1,646
Transportation
Segment Reporting Information
Net sales									70,139	64,391	59,578
Nonoperating income (expense):
Depreciation, amortization, and impairment									1,029	1,102	1,138
International
Segment Reporting Information
Net sales									93,161	94,341	92,457
Nonoperating income (expense):
Depreciation, amortization, and impairment									2,460	2,829	1,163
Unallocated corporate depreciation
Nonoperating income (expense):
Depreciation, amortization, and impairment									2,917	2,750	2,855
Operating Segments [Member]
Segment Reporting Information
Gross profit									138,700	130,294	145,669
Contribution Margin									72,798	65,646	82,909
Operating Segments [Member] | Commerical
Segment Reporting Information
Gross profit									29,246	31,785	26,665
Contribution Margin									9,897	13,218	7,986
Operating Segments [Member] | Live Events
Segment Reporting Information
Gross profit									39,518	32,164	49,755
Contribution Margin									26,074	18,484	35,439
Operating Segments [Member] | High School Park and Recreation
Segment Reporting Information
Gross profit									28,874	26,858	29,317
Contribution Margin									15,341	14,518	18,317
Operating Segments [Member] | Transportation
Segment Reporting Information
Gross profit									23,910	22,525	21,247
Contribution Margin									19,566	18,260	17,048
Operating Segments [Member] | International
Segment Reporting Information
Gross profit									17,152	16,962	18,685
Contribution Margin									$ 1,920	$ 1,166	$ 4,119