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Note 4 - Accounts Receivable, Net (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Accounts Receivable, Allowance for Credit Loss, Current | [1] |  | $ 2,454 |  | $ 2,236
Accounts Receivable, Credit Loss Expense (Reversal) |  |  | 947 | $ 0 |
Internet Advertising And TV Advertising Contractual Deposit [Member] |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss, Current |  |  | 2,450 |  | $ 2,240
Accounts Receivable, Credit Loss Expense (Reversal) |  |  | $ 330 | $ 0 |
Internet Advertising and TV Advertising [Member] |  |  |  |  |
Number of Months Past Due (Month) |  |  | 6 months |  |
Accounts Receivable, Credit Loss Expense (Reversal) |  | $ 0 |  |  |
[1] | All of the VIEs' assets can be used to settle obligations of their primary beneficiary. Liabilities recognized as a result of consolidating these VIEs do not represent additional claims on the Company’s general assets (Note 2).

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