Consolidated Statements of Shareholders' Equity - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock, Common [Member]	Total
Balance	$ 2,096,000	$ 169,862,000	$ (21,774,000)	$ 668,000	$ (9,177,000)
Balance (in shares)	20,965,144				446,321
Balance (in shares) at Mar. 01, 2020	20,965,144				446,321
Balance at Mar. 01, 2020	$ 2,096,000	169,862,000	(21,774,000)	668,000	$ (9,177,000)
Net earnings	0	0	4,864,000	0		$ 4,864,000
Net earnings	0	0	4,864,000	0		$ 4,864,000
Unrealized gain (loss) on marketable securities, net of tax	$ 0	0	0	(1,004,000)	$ 0
Stock options exercised (in shares)	0				(1,450)	(1,450)
Stock options exercised	$ 0	(15,000)	0	0	$ 27,000
Stock-based compensation	$ 0	191,000	0	0	$ 0
Purchase of treasury stock (in shares)	0				137,397
Purchase of treasury stock	$ 0	0	0	0	$ (1,644,000)
Cash dividends	0	0	(8,153,000)	0	0
Cash dividends	$ (0)	(0)	8,153,000	(0)	$ 0
Stock options exercised (in shares)	(0)				1,450	1,450
Balance (in shares) at Feb. 28, 2021	20,965,144				582,268
Balance at Feb. 28, 2021	$ 2,096,000	170,038,000	(25,063)	(336,000)	$ (10,794,000)
Balance	$ 2,096,000	170,038,000	(25,063)	(336,000)	$ (10,794,000)
Balance (in shares)	20,965,144				582,268
Net earnings	$ 0	0	8,464,000	0	$ 0	$ 8,464,000
Net earnings	0	0	8,464,000	0	0	$ 8,464,000
Unrealized gain (loss) on marketable securities, net of tax	$ 0	0	0	(1,629,000)	$ 0
Stock options exercised (in shares)	0				75,334	(75,334)
Stock options exercised	$ 0	(658,000)	0	0	$ 1,397,000
Stock-based compensation	0	285,000	0	0	0
Cash dividends	0	0	(8,168,000)	0	0
Cash dividends	$ (0)	(0)	8,168,000	(0)	$ (0)
Stock options exercised (in shares)	(0)				(75,334)	75,334
Balance (in shares) at Feb. 27, 2022	20,965,144				506,934
Balance at Feb. 27, 2022	$ 2,096,000	169,665,000	(24,767,000)	(1,965,000)	$ (9,397,000)	$ 135,632,000
Balance	$ 2,096,000	169,665,000	(24,767,000)	(1,965,000)	$ (9,397,000)	135,632,000
Balance (in shares)	20,965,144				506,934
Net earnings	$ 0	0	10,731,000	0		10,731,000
Net earnings	0	0	10,731,000	0		$ 10,731,000
Unrealized gain (loss) on marketable securities, net of tax	$ 0	0	0	(2,279,000)	$ 0
Stock options exercised (in shares)	0				(13,000)	(13,000)
Stock options exercised	$ 0	(102,000)	0	0	$ 241,000
Stock-based compensation	0	369,000	0	0	0
Cash dividends	0	0	(28,658,000)	0	0
Cash dividends	$ (0)	(0)	28,658,000	(0)	$ 0
Stock options exercised (in shares)	(0)				13,000	13,000
Balance (in shares) at Feb. 26, 2023	20,965,144				493,934
Balance at Feb. 26, 2023	$ 2,096,000	169,932,000	(42,694,000)	(4,244,000)	$ (9,156,000)	$ 115,934,000
Balance	$ 2,096,000	$ 169,932,000	$ (42,694,000)	$ (4,244,000)	$ (9,156,000)	$ 115,934,000
Balance (in shares)	20,965,144				493,934