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Note 14 - Subsequent Events (Details Textual) - USD ($)	Jul. 20, 2021	Jul. 09, 2021	Jun. 30, 2021
Subsequent Event [Member] | Sale of TOT Group, Inc. [Member]
Sale of Stock, Percentage of Ownership before Transaction	100.00%
Esousa Holdings LLC [Member] | ESOUSA Agreement [Member]
Maximum Amount of Promissory Notes Authorized to be Purchased			$ 15,000,000
Esousa Holdings LLC [Member] | ESOUSA Agreement [Member] | Subsequent Event [Member]
Master Exchange Agreement, Finance, Percentage of Gross Proceeds from Sale of Common Stock		88.00%
Master Exchange Agreement, Amount of Each Tranche		$ 100,000

X

- Definition

Amount of each portion of promissory notes authorized to be purchase pursuant to the master exchange agreement.

+ References

No definition available.

+ Details

Name:	nete_MasterExchangeAgreementAmountOfEachTranche
Namespace Prefix:	nete_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The percentage of the gross proceeds from the shares of common stock sold by the counter party to finance the purchase of exchange amount pursuant to the master exchange agreement.

+ References

No definition available.

+ Details

Name:	nete_MasterExchangeAgreementFinancePercentageOfGrossProceedsFromSaleOfCommonStock
Namespace Prefix:	nete_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The maximum amount of promissory notes authorized to be purchased pursuant to the agreement.

+ References

No definition available.

+ Details

Name:	nete_MaximumAmountOfPromissoryNotesAuthorizedToBePurchased
Namespace Prefix:	nete_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Percentage of subsidiary's or equity investee's stock owned by parent company before stock transaction.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockPercentageOfOwnershipBeforeTransaction
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

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

X

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=nete_SaleOfTOTGroupIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=nete_ESOUSAHoldingsLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=nete_ESOUSAAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: