Note 7 - Leases - Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Amortization of right-of-use assets	$ 1,179	$ 1,644	$ 2,306	$ 3,484
Interest on lease obligations	207	199	361	422
Finance lease cost	1,386	1,843	2,667	3,906
Operating lease cost	1,442	1,809	3,274	4,158
Short-term lease cost	2,821	2,547	5,566	3,877
Total lease cost	$ 5,649	$ 6,199	11,507	11,941
Operating cash flows from finance leases			361	422
Operating cash flows from operating leases			4,475	6,976
Financing cash flows from finance leases			2,825	4,560
Payments for Amounts Included in the Measurement of Lease Liabilities, Total			7,661	11,958
Right-of-use assets obtained in exchange for new finance lease obligations			0	73
Right-of-use assets obtained in exchange for new operating lease obligations			2,117	4,063
Right-of-use assets derecognized upon early termination of finance leases			8	530
Right-of-use assets derecognized upon early termination of operating leases			$ 8,222	$ 1,768
Financing leases (Year)	4 years 1 month 6 days	4 years 6 months	4 years 1 month 6 days	4 years 6 months
Operating leases, lease term (Year)	4 years 3 months 18 days	4 years 8 months 12 days	4 years 3 months 18 days	4 years 8 months 12 days
Financing leases	4.00%	3.90%	4.00%	3.90%
Operating leases, discount rate	4.90%	4.70%	4.90%	4.70%