Note 5 - Prepayments and Deposit to Suppliers - Prepayments and Deposit to Suppliers (Details) - USD ($) $ in Thousands		Jun. 30, 2021	Dec. 31, 2020
Prepayment and deposit to suppliers *	[1]	$ 8,035	$ 4,657
Deposits to TV Ad and Internet Ad Resources Providers [Member]
Prepayment and deposit to suppliers *		619	307
Prepayment to TV Ad and Internet Ad Resources Providers [Member]
Prepayment and deposit to suppliers *		4,390	3,696
Deposits and Prepayments for Other Investing Contracts [Member]
Prepayment and deposit to suppliers *		2,500	0
Other Deposits and Prepayments [Member]
Prepayment and deposit to suppliers *		$ 526	$ 654

[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).