Summary of Significant Accounting Policies and Related Data (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Feb. 27, 2016	Feb. 28, 2015	Mar. 01, 2014
Accounting Policies [Line Items]
Reporting period monthly lag	2 months
Fiscal time period	P52W	P52W	P52W
Percentage of net sales recorded on a percentage of completion basis	25.00%	25.00%	26.00%
Research and development expense	$ 8,000	$ 6,500	$ 7,800
Cost of Sales
Accounting Policies [Line Items]
Research and development expense	2,400	2,400	2,100
Selling, general and administrative expenses
Accounting Policies [Line Items]
Advertising expense	$ 1,200	1,100	$ 1,200
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	$ 1,600	$ 1,800