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v3.22.4

Subsequent Events (Details) - Subsequent Event [Member] | 1 Months Ended
--- | ---
Jan. 31, 2023 USD ($) shares
Subsequent Events (Details) [Line Items] |
Aggregate shares | shares | 903,716
Aggregate net proceeds | $ | $ 7,868,000

X
- Definition Aggregate net proceeds. + References No definition available. + Details
Name: | neon_AggregateNetProceeds
Namespace Prefix: | neon_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | neon_SubsequentEventsDetailsLineItems
Namespace Prefix: | neon_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of excess stock shares of an entity that have been sold or granted to shareholders. + References No definition available. + Details
Name: | us-gaap_ExcessStockSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |