Applicable income tax rate for an entity during the reporting period.

No definition available.

Name:	cnet_ApplicableIncomeTaxRate
Namespace Prefix:	cnet_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the applicable income tax rate for first HK $2 million.

+ References

No definition available.

+ Details

Name:	cnet_ApplicableIncomeTaxRateForFirst2Million
Namespace Prefix:	cnet_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the applicable income tax rate for subsequent profit.

+ References

No definition available.

+ Details

Name:	cnet_ApplicableIncomeTaxRateForSubsequentProfit
Namespace Prefix:	cnet_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

TBD

+ References

No definition available.

+ Details

Name:	cnet_IncomeTaxWithholdingRatePursuantToEITLaw
Namespace Prefix:	cnet_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Operating loss carryforward that is subject to percentage of taxable income deduction limitation.

+ References

No definition available.

+ Details

Name:	cnet_OperatingLossCarryforwardsTaxableIncomeDeductionLimitations
Namespace Prefix:	cnet_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

PRC value added tax rate for modern service provided.

+ References

No definition available.

+ Details

Name:	cnet_PRCValueAddedTaxRateForModernServiceProvided
Namespace Prefix:	cnet_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

PRC value added tax rate for modern service provided by small scale tax payer.

+ References

No definition available.

+ Details

Name:	cnet_PRCValueAddedTaxRateForModernServiceProvidedSmallScaleTaxPayer
Namespace Prefix:	cnet_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Reflect PRC value added tax surcharge rate.

+ References

No definition available.

+ Details

Name:	cnet_PrcvalueAddedTaxSurchargeRate
Namespace Prefix:	cnet_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the taxable profit for applicable income tax rate.

+ References

No definition available.

+ Details

Name:	cnet_TaxableProfitsForApplicableIncomeTaxRate
Namespace Prefix:	cnet_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

+ Details

Name:	us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 6.I.Fact.4)
-URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

+ Details

Name:	us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319

+ Details

Name:	us-gaap_OperatingLossCarryforwards
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

+ Details

Name:	us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeTaxAuthorityAxis=cnet_PRCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_NatureOfExpenseAxis=cnet_ProvisionOfModernServicesSmallScaleTaxPayerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=cnet_OtherPRCOperatingEntitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=cnet_BusinessOpportunityOnlineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=cnet_PRCSubsidiaryAndVIEsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=country_HK
Namespace Prefix:
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Note 14 - Taxation (Details Textual) $ in Thousands, $ in Millions		12 Months Ended
	Apr. 01, 2018 HKD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%	21.00%	21.00%
Income Tax Withholding Rate Pursuant to EIT Law		10.00%
Operating Loss Carryforwards, Total		$ 23,300	$ 20,300
Operating Loss Carryforwards, Taxable Income Deduction Limitations		80.00%
Deferred Tax Assets, Valuation Allowance, Total		$ 10,245	9,190
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		$ 920	$ 180
Minimum [Member]
PRC Value Added Tax Surcharge Rate		12.00%
Maximum [Member]
PRC Value Added Tax Surcharge Rate		14.00%
PRC [Member]
PRC Value Added Tax Rate for Modern Service Provided		6.00%	6.00%
PRC [Member] \| Provision of Modern Services Small Scale Tax Payer [Member]
PRC Value Added Tax Rate for Modern Service Provided Small Scale Tax Payer		3.00%	3.00%
Other PRC Operating Entities [Member] \| PRC [Member]
Applicable Income Tax Rate		25.00%	25.00%
Business Opportunity Online [Member] \| PRC [Member]
Applicable Income Tax Rate		15.00%	15.00%
PRC Subsidiary And VIE's [Member]
Operating Loss Carryforwards, Total		$ 22,500	$ 23,600
HONG KONG
Applicable Income Tax Rate for First Profit Limit	8.25%
Taxable Profits for Applicable Income Tax Rate	$ 2
Applicable Income Tax Rate for Subsequent Profit	16.50%