Note 5 - Prepayments and Deposit to Suppliers, Net - Prepayments and Deposit to Suppliers (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Prepayment and deposit to suppliers	$ 4,946	$ 6,980
Deposits to TV Ad and Internet Ad Resources Providers [Member]
Prepayment and deposit to suppliers	1,311	1,315
Prepayment to TV Ad and Internet Ad Resources Providers [Member]
Prepayment and deposit to suppliers	2,329	4,361
Prepayment For Software System Development [Member]
Prepayment and deposit to suppliers	796	1,062
Other Deposits and Prepayments [Member]
Prepayment and deposit to suppliers	$ 510	$ 242