Schedule II - Valuation and Qualifying Accounts - Valuation and Qualifying Accounts (Details) - USD ($)		12 Months Ended
		Feb. 26, 2017	Feb. 28, 2016	Mar. 01, 2015
Valuation Allowance of Deferred Tax Assets [Member]
Balance of beginning of period		$ 11,115,000	$ 11,887,000	$ 11,941,000
Costs and expenses			29,100	123,000
Reductions		(544,000)	(801,100)	(177,000)
Balance at end of period		10,571,000	11,115,000	11,887,000
Allowance for Doubtful Accounts [Member]
Balance of beginning of period		324,000	396,000	416,000
Costs and expenses		(27,000)	(2,000)	(5,000)
Balance at end of period		294,000	324,000	396,000
Accounts written off	[1]	$ (3,000)	$ (70,000)	$ (15,000)

[1] Uncollectible amounts, net of recoveries