Consolidated Statements of Comprehensive Earnings - USD ($) $ in Thousands	12 Months Ended
	Feb. 26, 2023	Feb. 27, 2022	Feb. 28, 2021
Net earnings	$ 10,731	$ 8,464	$ 4,864
Other comprehensive loss, net of tax:
Other comprehensive loss	(2,279)	(1,629)	(1,004)
Total comprehensive earnings	8,452	6,835	3,860
Gains on Marketable Securities [Member]
Other comprehensive loss, net of tax:
Unrealized holding gains arising during the period	240	108	421
Less: reclassification adjustment for gains included in net earnings	(7)	(36)	(272)
Losses on Marketable Securities [Member]
Other comprehensive loss, net of tax:
Unrealized holding gains arising during the period	(2,567)	(1,713)	(1,176)
Less: reclassification adjustment for gains included in net earnings	$ 55	$ 12	$ 23