Note 5 - Prepayments and Deposit to Suppliers, Net - Prepayments and Deposit to Suppliers (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Prepayment and deposit to suppliers, net	$ 6,906	$ 2,154
Deposits to TV Ad and Internet Ad Resources Providers [Member]
Prepayment and deposit to suppliers, net	638	963
Prepayment to TV Ad and Internet Ad Resources Providers [Member]
Prepayment and deposit to suppliers, net	4,752	727
Prepayment For Software System Development [Member]
Prepayment and deposit to suppliers, net	1,320
Other Deposits and Prepayments [Member]
Prepayment and deposit to suppliers, net	$ 196	$ 464