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Note 12 - Long-term Deposits and Prepayments (Details Textual) $ in Thousands | Jun. 30, 2021 USD ($)
--- | ---
Long-term Deposits and Prepayments | $ 560
Prepayments for Leasehold Improvements | 160
Prepayments for Share Subscription | $ 1,000
Entity [Member] |
Equity Securities without Readily Determinable Fair Value, Percent | 15.38%

X
- Definition Percentage of investment in equity security without readily determinable fair value. + References No definition available. + Details
Name: | cnet_EquitySecuritiesWithoutReadilyDeterminableFairValuePercent
Namespace Prefix: | cnet_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of long-term deposits and prepayments. + References No definition available. + Details
Name: | cnet_LongtermDepositsAndPrepayments
Namespace Prefix: | cnet_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of prepayments for leasehold improvements. + References No definition available. + Details
Name: | cnet_PrepaymentsForLeaseholdImprovements
Namespace Prefix: | cnet_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of prepayments for share subscription. + References No definition available. + Details
Name: | cnet_PrepaymentsForShareSubscription
Namespace Prefix: | cnet_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=cnet_EntityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |