Note 6 - Leases - Undiscounted Future Lease Payments Under Operating Leases and Financial Leases (Details) - USD ($) $ in Thousands	Jun. 27, 2020	Mar. 31, 2020	Jun. 29, 2019
Balance of 2021, operating	$ 17,076
Balance of 2021, financing	5,442
2022, operating	19,469
2022, financing	7,255
2023, operating	13,675
2023, financing	7,255
2024, operating	6,819
2024, financing	5,728
2025, operating	3,262
2025, financing	2,374
2026-2032, operating	4,598
2026-2032, financing	4,005
Total minimum payment required, operating	64,899
Total minimum payment required, financing	32,059
Less interest, operating	4,954
Less interest, financing	3,214
Present value of minimum lease payments, operating	59,945
Present value of minimum lease payments, financing	28,845
Amount due within one year, operating	21,311	$ 21,550	$ 26,641
Amount due within one year, financing	6,232	6,224	6,573
Long-term lease obligations	38,634	42,760	60,979
Long-term lease obligations	22,613	$ 24,366	$ 29,907
Current Portion of Long-term Debt and Lease Obligations [Member]
Amount due within one year, operating	$ 21,311