Commitments and Contingencies (Details)	Dec. 31, 2014 Capital commitment for purchase of property, plant and equipment USD ($)	Dec. 31, 2014 Capital commitment for purchase of property, plant and equipment CNY	Dec. 31, 2013 Capital commitment for purchase of property, plant and equipment CNY	Dec. 31, 2014 Purchase obligation for corn USD ($)	Dec. 31, 2014 Purchase obligation for corn CNY	Dec. 31, 2013 Purchase obligation for corn CNY
Commitments and contingencies
Purchase obligations	$ 4,402,644	26,939,788	0	$ 29,318,516	179,400,000	184,800,000

Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 440

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308

Name:	us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant