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Segment Information (Details Textual)	12 Months Ended
	Dec. 31, 2016 Segment
Segment Information (Textual)
Number of reportable segments	1

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- References

No definition available.

+ Details

Name:	neond_SegmentInformationTextualAbstract
Namespace Prefix:	neond_
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