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Note 7 - Other Current Assets, Net (Details Textual) $ in Thousands, ¥ in Millions | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2019 CNY (¥) | Dec. 31, 2018 USD ($) | Dec. 31, 2018 CNY (¥)
Accounts Receivable, Credit Loss Expense (Reversal) | $ 460 | $ 794 |  |  |
Internet Advertising And TV Advertising Contractual Deposit [Member] |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss, Ending Balance | 1,610 |  | ¥ 11 | $ 1,610 | ¥ 11
Accounts Receivable, Credit Loss Expense (Reversal) | 850 |  |  |  |
Short-term Working Capital Loan to an Unrelated Third Party [Member] |  |  |  |  |
Financing Receivable, after Allowance for Credit Loss, Total | 150 |  | ¥ 1 | $ 150 | ¥ 1
Accounts Receivable, Credit Loss Expense (Reversal) | $ 150 |  |  |  |

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