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Marketable Securities (Details Textual) (USD $) In Thousands, unless otherwise specified | Nov. 30, 2013 | Mar. 02, 2013
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Marketable Securities (Textual) [Abstract] |  |
Investments, Total | $ 13,800 |
Short-term available for sale securities | 2,689 | 26,007
Available-for-sale Securities, Debt Securities, Noncurrent | 11,103 | 12,807
Prism Assurance Ltd [Member] |  |
Marketable Securities (Textual) [Abstract] |  |
Investments, Total | $ 11,200 |

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