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Note 20 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Mar. 31, 2018
Payment for Blockchain Technology Based Applications Development Costs | $ (0) | $ 302 |
Contract to Develop Blockchain Technology Based Applications [Member] |  |  |
Application Development Contracts, Contract Amount | 4,960 |  | $ 4,500
Payment for Blockchain Technology Based Applications Development Costs | $ 4,410 |  |

X
- Definition Represents the amount of application development contract amount. + References No definition available. + Details
Name: | cnet_ApplicationDevelopmentContractsContractAmount
Namespace Prefix: | cnet_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The cash outflow associated with the development of blockchain technology based applications. + References No definition available. + Details
Name: | cnet_PaymentForBlockchainTechnologyBasedApplicationsDevelopmentCosts
Namespace Prefix: | cnet_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=cnet_ContractToDevelopBlockchainTechnologyBasedApplicationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |