Schedule II - Valuation and Qualifying Accounts - Valuation and Qualifying Accounts (Details) - USD ($)		12 Months Ended
		Feb. 25, 2018	Feb. 26, 2017	Feb. 28, 2016
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
Balance		$ 10,571,000	$ 11,115,000	$ 11,887,000
Costs and expenses		31,000		29,100
Other
Reductions			(544,000)	(801,100)
Balance		10,602,000	10,571,000	11,115,000
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
Balance		294,000	324,000	396,000
Costs and expenses		(8,000)	(27,000)	(2,000)
Accounts written off	[1]	(27,000)	(3,000)	(70,000)
Balance		$ 259,000	$ 294,000	$ 324,000

[1] Uncollectible amounts, net of recoveries