Consolidated Statements of Comprehensive Earnings - USD ($) $ in Thousands	12 Months Ended
	Feb. 27, 2022	Feb. 28, 2021	Mar. 01, 2020
Net earnings	$ 8,464	$ 4,864	$ 9,552
Other comprehensive (loss) earnings, net of tax:
Other comprehensive (loss) earnings	(1,629)	(1,004)	690
Total comprehensive earnings	6,835	3,860	10,242
Gains on Marketable Securities [Member]
Other comprehensive (loss) earnings, net of tax:
Unrealized holding gains (losses) arising during the period	108	421	990
Less: reclassification adjustment for gains (losses) included in net earnings	(36)	(272)	(49)
Losses on Marketable Securities [Member]
Other comprehensive (loss) earnings, net of tax:
Unrealized holding gains (losses) arising during the period	(1,713)	(1,176)	(291)
Less: reclassification adjustment for gains (losses) included in net earnings	$ 12	$ 23	$ 40