Consolidated Statements of Comprehensive Earnings - USD ($) $ in Thousands	12 Months Ended
	Mar. 01, 2020	Mar. 03, 2019	Feb. 25, 2018
Net earnings	$ 9,552	$ 113,545	$ 20,595
Other comprehensive earnings (loss), net of tax:
Foreign currency translation		(1,310)	(50)
Other comprehensive earnings (loss)	690	(153)	(895)
Total comprehensive earnings	10,242	113,392	19,700
Gains on Marketable Securities [Member]
Other comprehensive earnings (loss), net of tax:
Unrealized holding gains (losses) arising during the period	990	41
Less: reclassification adjustment for gains (losses) included in net earnings	(49)		(17)
Losses on Marketable Securities [Member]
Other comprehensive earnings (loss), net of tax:
Unrealized holding gains (losses) arising during the period	(291)	(87)	(2,189)
Less: reclassification adjustment for gains (losses) included in net earnings	$ 40	$ 1,203	$ 1,361