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Note 11 - Business Segment Reporting - Operations by Business Segment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
May. 31, 2015 | May. 25, 2014 | May. 26, 2013
Food Products Technology [Member] |  |  |
Net sales | $ 430,415 | $ 360,728 | $ 320,447
International sales | 80,500 | 47,224 | 27,532
Gross profit | 45,993 | 36,318 | 37,077
Net income applicable to Common Stockholders | 17,145 | 19,041 | 20,526
Identifiable assets | 228,672 | 196,257 | 180,104
Depreciation and amortization | 4,766 | 4,751 | 4,761
Capital expenditures | 12,895 | 10,950 | 5,598
Dividend income | 1,417 | 1,125 | 1,125
Interest income | 32 | 12 | 42
Interest expense | 1,655 | 1,402 | 1,707
Income tax expense | 792 | 33 | 3,399
Food Export [Member] |  |  |
Net sales | 67,837 | 69,827 | 78,568
International sales | 67,714 | 69,710 | 78,442
Gross profit | 4,252 | 5,340 | 5,274
Net income applicable to Common Stockholders | 1,041 | 1,973 | 1,660
Identifiable assets | 27,746 | 25,391 | 21,737
Depreciation and amortization | $ 6 | $ 6 | $ 4
Capital expenditures |  |  |
Dividend income |  |  |
Interest income |  |  |
Interest expense |  |  |
Income tax expense | $ 48 | $ 3 | $ 339
HA Based Biomaterials [Member] |  |  |
Net sales | 40,432 | 45,704 | 41,281
International sales | 15,246 | 20,312 | 26,792
Gross profit | 14,609 | 20,456 | 19,102
Net income applicable to Common Stockholders | 3,838 | 9,695 | 6,835
Identifiable assets | 85,779 | 85,858 | 80,940
Depreciation and amortization | 2,184 | 2,221 | 2,379
Capital expenditures | $ 4,499 | $ 3,877 | $ 3,190
Dividend income |  |  |
Interest income | $ 254 | $ 242 | $ 137
Interest expense | 174 | 248 | 301
Income tax expense | 177 | 17 | 1,400
Corporate Segment [Member] |  |  |
Net sales | $ 573 | $ 554 | $ 1,412
International sales |  |  |
Gross profit | $ 553 | $ 450 | $ 1,307
Net income applicable to Common Stockholders | (8,480) | (11,564) | (6,434)
Identifiable assets | 4,268 | 6,117 | 8,161
Depreciation and amortization | 134 | 136 | 151
Capital expenditures | $ 117 | $ 59 | $ 89
Dividend income |  |  |
Interest income | $ 29 | $ 6 |
Interest expense |  |  |
Income tax expense | $ 6,729 | $ 10,530 | $ 4,314
Net sales | 539,257 | 476,813 | 441,708
International sales | 163,460 | 137,246 | 132,766
Gross profit | 65,407 | 62,564 | 62,760
Net income applicable to Common Stockholders | 13,544 | 19,145 | 22,587
Identifiable assets | 346,465 | 313,623 | 290,942
Depreciation and amortization | 7,090 | 7,114 | 7,295
Capital expenditures | 17,511 | 14,886 | 8,877
Dividend income | 1,417 | 1,125 | 1,125
Interest income | 315 | 260 | 179
Interest expense | 1,829 | 1,650 | 2,008
Income tax expense | $ 7,746 | $ 10,583 | $ 9,452

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