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Note 15 - Taxation (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 15 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Dec. 31, 2018 | Nov. 30, 2015
Federal Income Tax Expense (Benefit), Continuing Operations, Total |  |  | $ 0 |  |  |  |
Income Tax Withholding Rate Pursuant to EIT Law | 10.00% |  | 10.00% |  | 10.00% |  |
Operating Loss Carryforwards, Total | $ 19,700 |  | $ 19,700 |  | $ 19,700 | $ 19,200 |
Operating Loss Carryforwards, Taxable Income Deduction Limitations | 80.00% |  | 80.00% |  | 80.00% |  |
Deferred Tax Assets, Valuation Allowance, Total | $ 9,551 |  | $ 9,551 |  | $ 9,551 | 9,875 |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | $ 260 | $ 760 | $ 450 | $ 1,170 |  |  |
Minimum [Member] |  |  |  |  |  |  |
PRC Value Added Tax Surcharge Rate | 12.00% |  | 12.00% |  | 12.00% |  |
Maximum [Member] |  |  |  |  |  |  |
PRC Value Added Tax Surcharge Rate | 14.00% |  | 14.00% |  | 14.00% |  |
PRC [Member] |  |  |  |  |  |  |
PRC Value Added Tax Rate for Modern Service Provided | 6.00% | 6.00% | 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% | 3.00% | 3.00% |  |  |
Tax Treaty Agreement [Member] |  |  |  |  |  |  |
Income Tax Withholding Rate Pursuant to EIT Law | 5.00% |  | 5.00% |  | 5.00% |  |
HONG KONG |  |  |  |  |  |  |
Federal Income Tax Expense (Benefit), Continuing Operations, Total | $ 0 |  | $ 0 |  |  |  |
Other Tax Expense (Benefit) |  |  | 0 |  |  |  |
Applicable Income Tax Rate for First Profit Limit |  |  |  |  | 8.25% |  |
Applicable Income Tax Rate for Subsequent Profit |  |  |  |  | 16.50% |  |
Profits Assessable | $ 0 |  | 0 |  |  |  |
ChinaNet BVI [Member] |  |  |  |  |  |  |
Other Tax Expense (Benefit) |  |  | $ 0 |  |  |  |
Other PRC Operating Entities [Member] | PRC [Member] |  |  |  |  |  |  |
Applicable Income Tax Rate | 25.00% | 25.00% | 25.00% | 25.00% |  |  |
Business Opportunity Online [Member] | PRC [Member] |  |  |  |  |  |  |
Applicable Income Tax Rate | 15.00% | 15.00% | 15.00% | 15.00% |  |  |
Business Opportunity Online [Member] | PRC [Member] | Minimum [Member] |  |  |  |  |  |  |
Enterprise Income Tax Rate In PRC |  |  |  |  |  |  | 15.00%
PRC Subsidiary And VIE's [Member] |  |  |  |  |  |  |
Operating Loss Carryforwards, Total | $ 26,300 |  | $ 26,300 |  | $ 26,300 | $ 25,200 |

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