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Note 9 - Business Segment Reporting - Operations by Business Segment (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Aug. 27, 2017 | Aug. 28, 2016
Net income (loss) | $ 2,146 | $ 3,312
Depreciation and amortization | 2,954 | 2,550
Dividend income | 413 | 413
Interest income | 31 | 4
Interest expense, net | 404 | 653
Income tax expense (benefit) | 1,250 | 1,889
Net sales | 123,357 | 132,394
International sales | 29,249 | 48,225
Gross profit | 19,286 | 21,144
Packaged Fresh Vegetables [Member] |  |
Net income (loss) | 3,783 | 2,323
Depreciation and amortization | 1,972 | 1,820
Dividend income | 413 | 413
Interest income | 11 | 4
Interest expense, net |  | 550
Income tax expense (benefit) | 1,096 | 655
Net sales | 102,568 | 95,945
International sales | 18,142 | 17,844
Gross profit | 15,015 | 14,406
Food Export [Member] |  |
Net income (loss) | (158) | 194
Depreciation and amortization |  | 1
Dividend income |  |
Interest income |  |
Interest expense, net |  |
Income tax expense (benefit) | (45) | 55
Net sales | 7,576 | 23,339
International sales | 7,576 | 23,339
Gross profit | 484 | 1,028
Biomaterials [Member] |  |
Net income (loss) | (155) | 1,243
Depreciation and amortization | 865 | 712
Dividend income |  |
Interest income |  |
Interest expense, net |  | 103
Income tax expense (benefit) | (27) | 350
Net sales | 12,164 | 12,332
International sales | 3,499 | 7,042
Gross profit | 3,522 | 5,122
Corporate Segment [Member] |  |
Net income (loss) | (1,324) | (448)
Depreciation and amortization | 117 | 17
Dividend income |  |
Interest income | 20 |
Interest expense, net | 404 |
Income tax expense (benefit) | 226 | 829
Net sales | 1,049 | 778
International sales | 32 |
Gross profit | $ 265 | $ 588

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