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Leases (Details) - Schedule of minimum future rentals on the non-cancellable finance leases $ in Thousands	6 Months Ended
	Jun. 30, 2021 USD ($)
Schedule of minimum future rentals on the non-cancellable finance leases [Abstract]
2021 (remaining months)	$ 354
2022	169
2023	22
Total minimum payments required:	545
Less amount representing interest:	(5)
Present value of net minimum lease payments:	540
Less current portion	(501)
Total	$ 39

X

- Definition

Amount of minimum lease payments for capital leases 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 sheets date.

+ References

No definition available.

+ Details

Name:	neon_CapitalLeasesFutureMinimumPaymentsDueCurrents
Namespace Prefix:	neon_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of minimum lease payments for capital leases due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheets date.

+ References

No definition available.

+ Details

Name:	neon_CapitalLeasesFutureMinimumPaymentsDueInThreeYear
Namespace Prefix:	neon_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of minimum lease payments for capital leases due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheets date.

+ References

No definition available.

+ Details

Name:	neon_CapitalLeasesFutureMinimumPaymentsDueInTwoYear
Namespace Prefix:	neon_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of minimum lease payments for capital lease.

+ References

No definition available.

+ Details

Name:	neon_CapitalLeasesFutureMinimumPaymentsDues
Namespace Prefix:	neon_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Present value of minimum lease payments for capital leases net of executory costs, including amounts paid by the lessee to the lessor for insurance, maintenance and tax.

+ References

No definition available.

+ Details

Name:	neon_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayment
Namespace Prefix:	neon_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Less amount representing interest.

+ References

No definition available.

+ Details

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

X

- Definition

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

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No definition available.

+ Details

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

X

- References

No definition available.

+ Details

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

X

- Definition

Total of finance lease.

+ References

No definition available.

+ Details

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