Consolidated Statements of Comprehensive Earnings (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 29, 2020	Dec. 01, 2019	Nov. 29, 2020	Dec. 01, 2019
Net earnings	$ 921	$ 2,446	$ 3,832	$ 7,168
Other comprehensive (loss) earnings, net of tax:
Other comprehensive (loss) earnings	(397)	(210)	(396)	329
Total comprehensive earnings	524	2,236	3,436	7,497
Gains on Marketable Securities [Member]
Other comprehensive (loss) earnings, net of tax:
Unrealized holding gains (losses) arising during the period	19	24	416	594
Less: reclassification adjustment for gains (losses) included in net earnings	(32)	(1)	(86)	(24)
Losses on Marketable Securities [Member]
Other comprehensive (loss) earnings, net of tax:
Unrealized holding gains (losses) arising during the period	(384)	(248)	(726)	(274)
Less: reclassification adjustment for gains (losses) included in net earnings		$ 15		$ 33