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Note 3 - Summary of Significant Accounting Policies - Effect of Point-of-sale Equipment on Other Current Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Balance	$ 525,000	$ 515,000
Purchases	272,000	305,000
Amortization	(334,000)	(295,000)
Balance	$ 463,000	$ 525,000

X

- Definition

Represents the amount of point-of-sale equipment included in other current assets at the balance sheet date.

+ References

No definition available.

+ Details

Name:	nete_OtherCurrentAssetsPointOfSaleEquipment
Namespace Prefix:	nete_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Represents the reduction in other current assets attributable to the amortization of point-of-sale equipment.

+ References

No definition available.

+ Details

Name:	nete_OtherCurrentAssetsPointOfSaleEquipmentEffectOfAmortization
Namespace Prefix:	nete_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Represents the increase in point-of-sale equipment during the period attributable to purchases.

+ References

No definition available.

+ Details

Name:	nete_PointOfSaleEquipmentPurchasesDuringPeriod
Namespace Prefix:	nete_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration