Note 4 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jan. 30, 2021	Feb. 01, 2020	Jan. 30, 2021	Feb. 01, 2020
Net sales	$ 94,139	$ 127,657	$ 365,150	$ 482,824
Transferred at Point in Time [Member]
Net sales	51,196	62,940	179,301	222,853
Transferred over Time [Member]
Net sales	42,943	64,717	185,849	259,971
Unique Configuration [Member]
Net sales	32,732	53,231	154,081	223,955
Limited Configuration [Member]
Net sales	50,254	61,351	176,802	219,417
Service and Other [Member]
Net sales	11,153	13,075	34,267	39,452
Commercial [Member]
Net sales	30,085	36,880	94,947	120,566
Commercial [Member] \| Transferred at Point in Time [Member]
Net sales	25,092	26,555	71,210	81,562
Commercial [Member] \| Transferred over Time [Member]
Net sales	4,993	10,325	23,737	39,004
Commercial [Member] \| Unique Configuration [Member]
Net sales	2,087	7,209	14,322	29,181
Commercial [Member] \| Limited Configuration [Member]
Net sales	24,630	26,304	69,796	80,193
Commercial [Member] \| Service and Other [Member]
Net sales	3,368	3,367	10,829	11,192
Live Events [Member]
Net sales	23,330	40,571	112,626	159,196
Live Events [Member] \| Transferred at Point in Time [Member]
Net sales	5,720	8,614	18,670	30,903
Live Events [Member] \| Transferred over Time [Member]
Net sales	17,610	31,957	93,956	128,293
Live Events [Member] \| Unique Configuration [Member]
Net sales	14,006	27,459	83,283	114,459
Live Events [Member] \| Limited Configuration [Member]
Net sales	4,536	6,436	14,566	25,662
Live Events [Member] \| Service and Other [Member]
Net sales	4,788	6,676	14,777	19,075
High School Park and Recreation [Member]
Net sales	14,644	14,775	71,165	75,433
High School Park and Recreation [Member] \| Transferred at Point in Time [Member]
Net sales	9,163	11,080	48,249	55,791
High School Park and Recreation [Member] \| Transferred over Time [Member]
Net sales	5,481	3,695	22,916	19,642
High School Park and Recreation [Member] \| Unique Configuration [Member]
Net sales	3,604	1,511	16,363	12,727
High School Park and Recreation [Member] \| Limited Configuration [Member]
Net sales	10,424	12,422	52,808	60,349
High School Park and Recreation [Member] \| Service and Other [Member]
Net sales	616	842	1,994	2,357
Transportation [Member]
Net sales	11,769	13,916	41,590	53,264
Transportation [Member] \| Transferred at Point in Time [Member]
Net sales	3,436	5,683	15,740	19,901
Transportation [Member] \| Transferred over Time [Member]
Net sales	8,333	8,233	25,850	33,363
Transportation [Member] \| Unique Configuration [Member]
Net sales	7,880	7,857	24,579	32,173
Transportation [Member] \| Limited Configuration [Member]
Net sales	3,273	5,580	15,364	19,550
Transportation [Member] \| Service and Other [Member]
Net sales	616	479	1,647	1,541
International [Member]
Net sales	14,311	21,515	44,822	74,365
International [Member] \| Transferred at Point in Time [Member]
Net sales	7,785	11,008	25,432	34,696
International [Member] \| Transferred over Time [Member]
Net sales	6,526	10,507	19,390	39,669
International [Member] \| Unique Configuration [Member]
Net sales	5,155	9,195	15,534	35,415
International [Member] \| Limited Configuration [Member]
Net sales	7,391	10,609	24,268	33,663
International [Member] \| Service and Other [Member]
Net sales	$ 1,765	$ 1,711	$ 5,020	$ 5,287