Note 13 - Income Taxes - Components of the Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Federal
State	2	42
Current Income Tax Expense (Benefit), Total	2	42
Federal	123	2
State	40	39
Deferred Income Tax Expense (Benefit), Total	163	41
Change in liability for uncertain tax positions	(9)	1
Change in valuation allowance	(154)	(42)
Provision for income taxes	$ 2	$ 42