Note 5 - Leases - Undiscounted Future Lease Payments Under Operating Leases and Financial Leases (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Mar. 31, 2019	Dec. 29, 2018
Balance of 2020, operating	$ 5,435
Balance of 2020, financing	1,945
2021, operating	26,301
2021, financing	7,782
2022, operating	19,683
2022, financing	7,782
2023, operating	13,446
2023, financing	7,782
2024, operating	6,496
2024, financing	6,064
2025-2031, operating	7,516
2025-2031, financing	6,161
Total minimum payment required, operating	78,877
Total minimum payment required, financing	37,516
Less interest, operating	6,481
Less interest, financing	3,926
Operating Lease, Liability, Total	72,396
Present value of minimum lease payments, financing	33,590
Amount due within one year, operating	24,430
Amount due within one year, financing	6,584
Long-term lease obligations, operating	47,966
Long-term lease obligations, financing	$ 27,006