Note 5 - Prepayments and Deposit to Suppliers - Prepayments and Deposit to Suppliers (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Prepayment and deposit to suppliers	$ 2,079	$ 2,154
Deposits to TV Ad and Internet Ad Resources Providers [Member]
Prepayment and deposit to suppliers	743	963
Prepayment to TV Ad and Internet Ad Resources Providers [Member]
Prepayment and deposit to suppliers	936	727
Other Deposits and Prepayments [Member]
Prepayment and deposit to suppliers	$ 400	$ 464