Schedule II - Valuation and Qualifying Accounts - Valuation and Qualifying Accounts (Details) - USD ($)	12 Months Ended
	Feb. 26, 2023	Feb. 27, 2022	Feb. 28, 2021
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
Balance	$ 104,000	$ 89,000	$ 73,000
Costs and expenses	16,000	15,000	16,000
Accounts written off	0	0	0
Translation adjustment	0	0	0
Balance	120,000	104,000	89,000
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
Balance	3,587,000	3,587,000	3,175,000
Costs and expenses	0	0	412,000
Other	0	0	0
Reductions	(649,000)	0	0
Balance	$ 2,938,000	$ 3,587,000	$ 3,587,000