Note 6 - Prepayments and Deposit to Suppliers - Prepayments and Deposit to Suppliers (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Prepayment and deposit to suppliers	$ 2,579	$ 4,073
Deposits to TV Ad and Internet Ad Resources Providers [Member]
Prepayment and deposit to suppliers	1,579	1,870
Prepayment to TV Ad and Internet Ad Resources Providers [Member]
Prepayment and deposit to suppliers	769	1,331
Deposits to Other Service Providers [Member]
Prepayment and deposit to suppliers		765
Other Deposits and Prepayments [Member]
Prepayment and deposit to suppliers	$ 231	$ 107