Note 14 - Business Segment Reporting (Tables)

12 Months Ended

May 25, 2014

Segment Reporting [Abstract]

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

	May 25, 2014		May 26, 2013		May 27, 2012
Canada	$	46.6	$	27.8	$	20.8
Taiwan	$	30.7	$	31.0	$	22.7
Belgium	$	13.1	$	16.6	$	15.6
Japan	$	9.9	$	10.6	$	11.1
Indonesia	$	9.6	$	21.0	$	23.0
China	$	8.2	$	5.0	$	4.3
All Other Countries	$	19.1	$	20.8	$	17.0

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Food Products				Hyaluronan- based
Fiscal Year Ended May 25, 2014	Technology		Food Export		Biomaterials		Corporate			TOTAL
Net sales	$	360,728	$	69,827	$	45,704	$	554		$	476,813
International sales	$	47,224	$	69,710	$	20,312	$	—		$	137,246
Gross profit	$	36,318	$	5,340	$	20,456	$	450		$	62,564
Net income (loss)	$	19,041	$	1,973	$	9,695	$	(11,564	)	$	19,145
Identifiable assets	$	196,257	$	25,391	$	85,858	$	6,117		$	313,623
Depreciation and amortization	$	4,751	$	6	$	2,221	$	136		$	7,114
Capital expenditures	$	10,950	$	—	$	3,877	$	59		$	14,886
Dividend income	$	1,125	$	—	$	—	$	—		$	1,125
Interest income	$	12	$	—	$	242	$	6		$	260
Interest expense	$	1,402	$	—	$	248	$	—		$	1,650
Income tax expense	$	33	$	3	$	17	$	10,530		$	10,583

Fiscal Year Ended May 26, 2013
Net sales	$	320,447	$	78,568	$	41,281	$	1,412		$	441,708
International sales	$	27,532	$	78,442	$	26,792	$	—		$	132,766
Gross profit	$	37,077	$	5,274	$	19,102	$	1,307		$	62,760
Net income (loss)	$	20,526	$	1,660	$	6,835	$	(6,434	)	$	22,587
Identifiable assets	$	180,104	$	21,737	$	80,940	$	8,161		$	290,942
Depreciation and amortization	$	4,761	$	4	$	2,379	$	151		$	7,295
Capital expenditures	$	5,598	$	—	$	3,190	$	89		$	8,877
Dividend income	$	1,125	$	—	$	—	$	—		$	1,125
Interest income	$	42	$	—	$	137	$	—		$	179
Interest expense	$	1,707	$	—	$	301	$	—		$	2,008
Income tax expense	$	3,399	$	339	$	1,400	$	4,314		$	9,452

Fiscal Year Ended May 27, 2012
Net sales	$	207,582	$	71,485	$	34,283	$	4,202		$	317,552
International sales	$	20,528	$	71,054	$	22,904	$	—		$	114,486
Gross profit	$	25,237	$	4,900	$	17,994	$	4,007		$	52,138
Net income (loss)	$	17,527	$	2,269	$	7,672	$	(14,772	)	$	12,696
Identifiable assets	$	169,541	$	18,425	$	81,927	$	7,799		$	277,692
Depreciation and amortization	$	3,191	$	7	$	2,242	$	181		$	5,621
Capital expenditures	$	2,498	$	—	$	2,798	$	75		$	5,371
Dividend income	$	1,125	$	—	$	—	$	—		$	1,125
Interest income	$	30	$	—	$	129	$	21		$	180
Interest expense	$	178	$	—	$	751	$	—		$	929
Income tax expense	$	—	$	—	$	—	$	7,185		$	7,185