Name:	born_RequiredPercentageOfAfterTaxProfitAllocatedToGeneralReserve
Namespace Prefix:	born_
Data Type:	num:percentItemType
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Period Type:	duration

Represents the required minimum percentage of after tax profit allocated to statutory common reserve for domestic enterprise per company law of the PRC.

No definition available.

Name:	born_RequiredPercentageOfAfterTaxProfitAllocatedToStatutoryCommonReserve
Namespace Prefix:	born_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	born_RestrictedNetAssetsAbstract
Namespace Prefix:	born_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Represents the threshold percentage criteria expressed as a percentage of registered capital for the transfer of after-tax profit by foreign invested enterprise in China to general reserve fund. If the general reserve fund exceeds the specified threshold of the registered capital, further appropriation is not required.

No definition available.

Name:	born_ThresholdPercentageOfGeneralReserveNeedToBeMadeOverEntitiesRegisteredCapital
Namespace Prefix:	born_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the threshold percentage criteria expressed as a percentage of registered capital for the transfer of after-tax profit by domestic invested enterprise in China to statutory common reserve funds. If the statutory common reserve fund exceeds the specified threshold of the registered capital, further appropriation is not required.

No definition available.

Name:	born_ThresholdPercentageOfStatutoryCommonReserveNeedToBeMadeOverEntitiesRegisteredCapital
Namespace Prefix:	born_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Amount of restricted net assets of consolidated and unconsolidated subsidiaries as of the end of the most recently completed fiscal year.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(e)(3)(ii))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph e

-Subparagraph 3

-Article 4