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Note 11 - Blockchain Software Application Platform Development Costs (Details Textual) $ in Thousands, ¥ in Millions | Jun. 30, 2021 USD ($) | Mar. 31, 2018 USD ($) | Mar. 31, 2018 CNY (¥)
--- | --- | --- | ---
Capitalized Cost of Blockchain Technology Based Applications Development Costs | $ 4,410 |  |
Contract to Develop Blockchain Technology Based Applications [Member] |  |  |
Application Development Contracts, Contract Amount | $ 4,960 | $ 4,500 |
Contract to Develop Social Network Based Applications [Member] |  |  |
Application Development Contracts, Contract Amount |  | $ 460 | ¥ 3

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 value of capitalized intangible costs of blockchain technology based application development costs. + References No definition available. + Details
Name: | cnet_CapitalizedCostOfBlockchainTechnologyBasedApplicationsDevelopmentCosts
Namespace Prefix: | cnet_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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