Note 7 - Leases - Undiscounted Future Lease Payments Under Operating Leases and Financial Leases (Details) - USD ($) $ in Thousands	Dec. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Balance of 2024, operating	$ 849
Balance of 2024, financing	1,713
2025, operating	6,457
2025, financing	5,296
2026, operating	4,661
2026, financing	4,210
2027, operating	3,525
2027, financing	3,152
2028, operating	3,269
2028, financing	2,774
2029-2034, operating	2,969
2029-2034, financing	2,965
Total minimum payment required, operating	21,730
Total minimum payment required, financing	20,110
Less interest, operating	2,050
Less interest, financing	1,703
Present value of minimum lease payments, operating	19,680
Present value of minimum lease payments, financing	18,407
Long-term lease obligations, operating	13,617	$ 16,675	$ 17,219
Long-term lease obligations, financing	13,102	$ 17,293	$ 17,382
Current Portion of Long-term Debt and Lease Obligations [Member]
Amount due within one year, operating	6,063
Amount due within one year, financing	$ 5,305