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Summary of Significant Accounting Policies (Details) - Schedule of activity related to the product warranty liability - USD ($) $ in Thousands | 9 Months Ended
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Sep. 30, 2021 | Dec. 31, 2020
Schedule of activity related to the product warranty liability [Abstract] |  |
Balance at beginning of period | $ 25 | $ 24
Provisions for warranty issued | 14 | 1
Balance at end of period | $ 39 | $ 25

X
- Definition Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability. + References No definition available. + Details
Name: | neon_BalanceBeginning
Namespace Prefix: | neon_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability. + References No definition available. + Details
Name: | neon_BalancetEnd
Namespace Prefix: | neon_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References No definition available. + Details
Name: | neon_ProvisionsForWarrantyIssued
Namespace Prefix: | neon_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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