Summary of Significant Accounting Policies and Related Data (Details Textual) (USD $)	12 Months Ended			3 Months Ended	12 Months Ended
	Mar. 02, 2013	Mar. 03, 2012	Feb. 26, 2011	May 16, 2013 Subsequent Event Industrial Development Bonds	Mar. 02, 2013 Cost of Sales	Mar. 03, 2012 Cost of Sales	Feb. 26, 2011 Cost of Sales	Mar. 02, 2013 Selling, general and administrative expenses	Mar. 03, 2012 Selling, general and administrative expenses	Feb. 26, 2011 Selling, general and administrative expenses	Mar. 02, 2013 Minimum	Mar. 02, 2013 Maximum	Mar. 02, 2013 Current Liabilities and Other Non Current Liabilities
Accounting Policies [Line Items]
Reporting period monthly lag	2 months
Fiscal time period	P52W	P53W	P52W
Percentage of LIFO inventory	48.00%
Amount inventories would have been if FIFO method used	$ 5,300,000	$ 5,500,000
Effect of inventory liquidation on net income	200,000	100,000	300,000
Impairment charge	0
Reserve for environmental liabilities													2,000,000
Performance period for percentage of completion contracts											12 months	18 months
Percentage of net sales recorded on a percentage of completion basis	27.00%	23.00%	26.00%
Research and development expense	6,800,000	7,200,000	6,300,000		1,600,000	800,000	1,800,000
Advertising expense								1,400,000	1,400,000	1,000,000
Amount of industrial development bonds paid back to the state				10,000,000
Debt issue costs expensed in connection with re-paying debt				$ 200,000