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v3.21.2

Note 5 - Prepayments and Deposit to Suppliers (Details Textual) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 USD ($) | Jun. 30, 2021 USD ($)
Cryptocurrency Mining Machine Purchase [Member] |  |
Purchase Agreement Prepayment |  | $ 1.5
Purchase Agreement, Expected Refund | $ 1.5 |
Potential Merger and Acquisition [Member] |  |
Business Combination, Nonrefundable Deposit | $ 1.0 | $ 1.0

X
- Definition The amount of refundable deposit paid under a business combination. + References No definition available. + Details
Name: | cnet_BusinessCombinationRefundableDeposit
Namespace Prefix: | cnet_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of expected refund under a purchase agreement. + References No definition available. + Details
Name: | cnet_PurchaseAgreementExpectedRefund
Namespace Prefix: | cnet_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | cnet_PurchaseAgreementPrepayment
Namespace Prefix: | cnet_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_AssetAcquisitionAxis=cnet_CryptocurrencyMiningMachinePurchaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=cnet_PotentialMergerAndAcquisitionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |