Note 8 - Leases - Details of Right-of-Use Assets and Lease Liabilities (Details) - USD ($)	Jan. 02, 2022	Jan. 03, 2021	Mar. 31, 2019
Total	$ 1,529,000	$ 1,839,000	$ 975,000
Total	1,563,000	1,882,000	$ 939,000
Right of Use Assets, Net [Member]
Operating Lease, Right-of-Use Asset	809,000	1,134,000
Finance leases	720,000	705,000
Current and Lease Liabilities - Non-current [Member]
Operating Lease, Liability, Total	873,000	1,212,000
Finance leases	$ 690,000	$ 670,000