Name:	neon_LeasesDetailsScheduleoffutureminimumpaymentsundernoncancellableoperatingleasecommitmentsLineItems
Namespace Prefix:	neon_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

No definition available.

Name:	neon_OperatingLeasesFutureMinimumPaymentDue
Namespace Prefix:	neon_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

No definition available.

Name:	neon_OperatingLeasesFutureMinimumPaymentDueCurrent
Namespace Prefix:	neon_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

Name:	neon_OperatingLeasesFutureMinimumPaymentsDueInTwoYear
Namespace Prefix:	neon_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

No definition available.

Name:	neon_OperatingsLeaseCurrentPortion
Namespace Prefix:	neon_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Total lease liabilities.

No definition available.

Name:	neon_TotalLeaseLiabilities
Namespace Prefix:	neon_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The receivable or note face amount less the unamortized discount or premium.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482925/835-30-45-1A