v2.4.0.8

Segment Information (Details)	12 Months Ended
	Dec. 31, 2012 Segments	Dec. 31, 2011 Segments
Segment Information (Textual) [Abstract]
Number of reportable segments	1	1

X

- Details

Name:	ngmc_SegmentInformationTextualAbstract
Namespace Prefix:	ngmc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration