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Note 17 - Warrant Liabilities - Warrant Activity (Details) - $ / shares | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2019 | Dec. 31, 2018
Balance (in shares) | 774,000 |
Weighted average remaining contractual life (Year) | 1 year 47 days | 1 year 229 days
Weighted average exercise price (in dollars per share) | $ 6.60 |
Exercisable (in shares) | 774,000 |
Exercisable, weighted average remaining contractual life (Year) | 1 year 47 days | 1 year 229 days
Exercisable, weighted average exercise price (in dollars per share) | $ 6.60 |
Granted/Vested (in shares) |  |
Forfeited (in shares) |  |
Exercised (in shares) |  |
Balance (in shares) | 774,000 | 774,000
Weighted average exercise price (in dollars per share) | $ 6.60 | $ 6.60
Exercisable (in shares) | 774,000 | 774,000
Exercisable, weighted average exercise price (in dollars per share) | $ 6.60 | $ 6.60

X
- Definition The number of warrants or rights cancelled during period. + References No definition available. + Details
Name: | cnet_ClassOfWarrantOrRightCancelledDuringPeriod
Namespace Prefix: | cnet_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of warrants or rights exercisable. + References No definition available. + Details
Name: | cnet_ClassOfWarrantOrRightExercisable
Namespace Prefix: | cnet_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average exercise price per share of warrants or rights exercisable. + References No definition available. + Details
Name: | cnet_ClassOfWarrantOrRightExercisableWeightedAverageExercisePrice
Namespace Prefix: | cnet_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average remaining contractual term for exercisable warrants outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | cnet_ClassOfWarrantOrRightExercisableWeightedAverageRemainingContractualTerm
Namespace Prefix: | cnet_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of warrants or rights exercised during period. + References No definition available. + Details
Name: | cnet_ClassOfWarrantOrRightExercisedDuringPeriod
Namespace Prefix: | cnet_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of warrants or rights issued during period. + References No definition available. + Details
Name: | cnet_ClassOfWarrantOrRightIssuedDuringPeriod
Namespace Prefix: | cnet_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average exercise price per share of warrants or rights outstanding. + References No definition available. + Details
Name: | cnet_ClassOfWarrantOrRightOutstandingWeightedAverageExercisePrice
Namespace Prefix: | cnet_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average remaining contractual term for warrants outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | cnet_ClassOfWarrantOrRightOutstandingWeightedAverageRemainingContractualTerm
Namespace Prefix: | cnet_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of warrants or rights outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant