Note 2 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
May 01, 2021	May 02, 2020	Apr. 27, 2019
Net sales	$ 482,033	$ 608,932	$ 569,704
Transferred at Point in Time [Member]
Net sales	237,576	285,701	276,951
Transferred over Time [Member]
Net sales	244,457	323,231	292,753
Unique Configuration [Member]
Net sales	202,139	278,405	250,011
Limited Configuration [Member]
Net sales	234,069	279,224	271,786
Service and Other [Member]
Net sales	45,825	51,303	47,907
Commercial [Member]
Net sales	127,300	152,627	148,833
Commercial [Member] \| Transferred at Point in Time [Member]
Net sales	98,243	105,096	111,617
Commercial [Member] \| Transferred over Time [Member]
Net sales	29,057	47,531	37,216
Commercial [Member] \| Unique Configuration [Member]
Net sales	16,535	35,212	25,171
Commercial [Member] \| Limited Configuration [Member]
Net sales	96,420	102,847	108,921
Commercial [Member] \| Service and Other [Member]
Net sales	14,345	14,568	14,741
Live Events [Member]
Net sales	143,049	196,591	170,952
Live Events [Member] \| Transferred at Point in Time [Member]
Net sales	23,906	39,521	35,313
Live Events [Member] \| Transferred over Time [Member]
Net sales	119,143	157,070	135,639
Live Events [Member] \| Unique Configuration [Member]
Net sales	104,682	140,044	119,569
Live Events [Member] \| Limited Configuration [Member]
Net sales	18,679	31,897	30,107
Live Events [Member] \| Service and Other [Member]
Net sales	19,688	24,650	21,276
High School Park and Recreation [Member]
Net sales	91,557	96,414	91,187
High School Park and Recreation [Member] \| Transferred at Point in Time [Member]
Net sales	60,859	68,582	60,763
High School Park and Recreation [Member] \| Transferred over Time [Member]
Net sales	30,698	27,832	30,424
High School Park and Recreation [Member] \| Unique Configuration [Member]
Net sales	22,258	19,176	21,792
High School Park and Recreation [Member] \| Limited Configuration [Member]
Net sales	66,697	74,266	66,825
High School Park and Recreation [Member] \| Service and Other [Member]
Net sales	2,602	2,972	2,570
Transportation [Member]
Net sales	58,284	70,139	64,391
Transportation [Member] \| Transferred at Point in Time [Member]
Net sales	20,180	25,157	24,500
Transportation [Member] \| Transferred over Time [Member]
Net sales	38,104	44,982	39,891
Transportation [Member] \| Unique Configuration [Member]
Net sales	36,398	43,519	38,490
Transportation [Member] \| Limited Configuration [Member]
Net sales	19,690	24,588	23,799
Transportation [Member] \| Service and Other [Member]
Net sales	2,196	2,032	2,102
International [Member]
Net sales	61,843	93,161	94,341
International [Member] \| Transferred at Point in Time [Member]
Net sales	34,388	47,345	44,758
International [Member] \| Transferred over Time [Member]
Net sales	27,455	45,816	49,583
International [Member] \| Unique Configuration [Member]
Net sales	22,266	40,454	44,989
International [Member] \| Limited Configuration [Member]
Net sales	32,583	45,626	42,134
International [Member] \| Service and Other [Member]
Net sales	$ 6,994	$ 7,081	$ 7,218