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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 |  |  |  |  |  |  |  |  |

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