Summary of Significant Accounting Policies and Related Data (Details Textual) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 01, 2014	Mar. 02, 2013	Mar. 03, 2012
Accounting Policies [Line Items]
Reporting period monthly lag	2 months
Fiscal time period	P52W	P52W	P53W
Percentage of LIFO inventory	53.00%
Amount inventories would have been if FIFO method used	$ 5,600	$ 5,300
Effect of inventory liquidation on net income		200	100
Impairment charge	0
Percentage of net sales recorded on a percentage of completion basis	26.00%	27.00%	23.00%
Research and development expense	7,800	6,800	7,200
Cost of Sales
Accounting Policies [Line Items]
Research and development expense	2,100	1,600	800
Selling, general and administrative expenses
Accounting Policies [Line Items]
Advertising expense	1,200	1,400	1,400
Minimum
Accounting Policies [Line Items]
Performance period for percentage of completion contracts	12 months
Maximum
Accounting Policies [Line Items]
Performance period for percentage of completion contracts	18 months
Current Liabilities and Other Non Current Liabilities
Accounting Policies [Line Items]
Reserve for environmental liabilities	$ 1,500