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Note 3 - Acquisitions (Detail) (USD $) | 3 Months Ended |  |  | 1 Months Ended |  |  | 1 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 26, 2012 | Aug. 28, 2011 | Apr. 23, 2012 | Apr. 30, 2012 Achieving Revenue Target [Member] GreenLine [Member] | Apr. 30, 2012 Exceeding Revenue Target [Member] GreenLine [Member] | Apr. 23, 2012 Revenue Target [Member] GreenLine [Member] | Apr. 23, 2012 GreenLine [Member] Customer Base [Member] | Apr. 23, 2012 GreenLine [Member] | Feb. 24, 2013 GreenLine [Member] | Apr. 30, 2012 GreenLine [Member] | May 29, 2011 Lifecore [Member] | Apr. 30, 2012 Lifecore [Member]
Number of Processing Plants |  |  |  |  |  |  |  | 4 |  |  |  |
Business Acquisition, Cost of Acquired Entity, Cash Paid |  |  | $ 62,900,000 |  |  |  |  |  |  | $ 62,900,000 |  | $ 40,000,000
Business Acquisition, Escrow Deposit |  |  |  |  |  |  |  |  |  | 4,700,000 |  | 6,600,000
Business Acquisition, Contingent Consideration, Potential Cash Payment |  |  |  | 4,000,000 | 3,000,000 |  |  | 7,000,000 | 4,000,000 | 7,000,000 |  | 10,000,000
Revenues | 102,074,000 | 73,301,000 |  |  |  | 3,000,000 |  |  |  |  |  |
Business Acquisition, Contingent Consideration, at Fair Value |  |  | (3,926,000) |  |  |  |  | 3,900,000 |  |  |  |
Business Acquisition, Cost of Acquired Entity, Purchase Price |  |  | 66,826,000 |  |  |  |  | 66,800,000 |  |  |  |
Effective Income Tax Rate, Continuing Operations | 37.00% | 38.00% |  |  |  |  |  | 40.00% |  |  |  |
Number of Intangible Assets Identified |  |  |  |  |  |  |  | 2 years |  |  |  |
Indefinite Lived Intangible Assets Market Value |  |  |  |  |  |  |  | 36,000,000 |  |  |  |
Finite-lived Intangible Assets Acquired |  |  |  |  |  |  | 7,500,000 |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  |  |  |  | 13 years |  |  |  |  |
Business Acquisition, Purchase Price Allocation, Goodwill Amount |  |  | 13,158,000 |  |  |  |  | 13,200,000 |  |  |  |
Business Acquisition, Purchase Price Allocation, Net Deferred Tax Liabilities, Noncurrent |  |  | 1,900,000 |  |  |  |  |  |  |  |  |
Escrow Deposit Released |  |  |  |  |  |  |  |  |  |  |  | 3,300,000
Business Acquisition, Contingent Consideration, Cash Payment |  |  |  |  |  |  |  |  |  |  | $ 10,000,000 |

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