Note 4 - Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 01, 2020	Mar. 03, 2019	Feb. 25, 2018
Balance, beginning of year	$ 937	$ 314
Tax positions - Discontinued Ops in prior period		187
Gross decreases - tax positions in prior period	(32)	(256)
Gross increases - current period tax positions	3,259	784	314
Audit settlements		(92)
Balance, end of year	4,164	937	314
Electronics Business [Member]
Balance, beginning of year		187	1,024
Gross decreases - tax positions in prior period			(688)
Gross increases - current period tax positions			6
Tax positions - Discontinued Ops in prior period		(187)
Lapse of statute of limitations			(155)
Balance, end of year			$ 187