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Concentrations (Detail) | 12 Months Ended
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Dec. 31, 2016 customer supplier | Dec. 31, 2015 supplier | Dec. 31, 2014 supplier
Concentration Risk [Line Items] |  |  |
Concentration risk, number of suppliers | 10 | 10 | 10
Ten Largest Customers [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 36.00% | 42.00% | 46.00%
Customer Concentration Risk [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, number of customers | customer | 10 |  |
Grain Supplier [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 31.00% | 31.00% | 35.00%
Concentration risk, number of suppliers | 2 |  | 1
Ten Largest Suppliers [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 63.00% | 75.00% | 70.00%
Net Sales [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 10.00% |  |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13531-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13537-108611 + Details
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