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Note 9 - Business Segment Reporting - Operations by Business Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Nov. 26, 2017 | Nov. 27, 2016 | Nov. 26, 2017 | Nov. 27, 2016
Net sales | $ 136,457 | $ 135,865 | $ 259,814 | $ 268,259
International sales | 34,416 | 45,954 | 63,665 | 94,179
Gross profit | 15,752 | 18,953 | 35,038 | 40,097
Net income (loss) | 487 | 1,326 | 2,633 | 4,638
Depreciation and amortization | 2,980 | 2,550 | 5,934 | 5,110
Dividend income | 412 | 412 | 825 | 825
Interest income | 42 | 4 | 74 | 7
Interest expense, net | 480 | 380 | 884 | 1,032
Income tax expense (benefit) | 207 | 693 | 1,458 | 2,582
Packaged Fresh Vegetables [Member] |  |  |  |
Net sales | 107,152 | 97,978 | 209,720 | 193,923
International sales | 17,708 | 16,422 | 35,850 | 34,266
Gross profit | 9,445 | 12,001 | 24,460 | 26,407
Net income (loss) | (270) | (250) | 3,513 | 2,073
Depreciation and amortization | 1,958 | 1,792 | 3,930 | 3,612
Dividend income | 412 | 412 | 825 | 825
Interest income | 18 | 4 | 29 | 7
Interest expense, net |  | 122 |  | 671
Income tax expense (benefit) | (95) | (142) | 1,002 | 513
Food Export [Member] |  |  |  |
Net sales | 13,992 | 25,701 | 21,568 | 49,040
International sales | 13,992 | 25,701 | 21,568 | 49,040
Gross profit | 826 | 1,850 | 1,310 | 2,878
Net income (loss) | 110 | 733 | (48) | 928
Depreciation and amortization |  | 2 |  | 3
Dividend income |  |  |  |
Interest income |  |  |  |
Interest expense, net |  |  |  |
Income tax expense (benefit) | 31 | 207 | (14) | 262
Biomaterials [Member] |  |  |  |
Net sales | 14,113 | 11,931 | 26,277 | 24,263
International sales | 2,675 | 3,831 | 6,174 | 10,873
Gross profit | 5,217 | 4,938 | 8,739 | 10,060
Net income (loss) | 1,260 | 1,312 | 1,105 | 2,555
Depreciation and amortization | 910 | 719 | 1,775 | 1,431
Dividend income |  |  |  |
Interest income |  |  |  |
Interest expense, net |  | (90) |  | 13
Income tax expense (benefit) | 374 | 388 | 347 | 738
Corporate Segment [Member] |  |  |  |
Net sales | 1,200 | 255 | 2,249 | 1,033
International sales | 41 |  | 73 |
Gross profit | 264 | 164 | 529 | 752
Net income (loss) | (613) | (469) | (1,937) | (918)
Depreciation and amortization | 112 | 37 | 229 | 64
Dividend income |  |  |  |
Interest income | 24 |  | 45 |
Interest expense, net | 480 | 348 | 884 | 348
Income tax expense (benefit) | $ (103) | $ 240 | $ 123 | $ 1,069

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