Schedule II - Valuation and Qualifying Accounts - Valuation and Qualifying Accounts (Details) - USD ($)	12 Months Ended
	Feb. 27, 2022		Feb. 28, 2021	Mar. 01, 2020
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
Balance	$ 3,587,000		$ 3,175,000	$ 2,755,000
Costs and expenses	0		412,000	420,000
Other	0		0	0
Reductions	0		0	0
Balance	3,587,000		3,587,000	3,175,000
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
Balance	89,000		73,000	32,000
Costs and expenses	15,000		16,000	41,000
Balance	104,000		89,000	73,000
Accounts written off	0	[1]	0	0	[1]
Translation adjustment	$ 0		$ 0	$ 0

[1] Uncollectible amounts, net of recoveries