Note 5 - Prepayments and Deposit to Suppliers - Prepayments and Deposit to Suppliers (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Prepayment and deposit to suppliers, net	$ 2,049	$ 2,154
Deposits to TV Ad and Internet Ad Resources Providers [Member]
Prepayment and deposit to suppliers, net	656	963
Prepayment to TV Ad and Internet Ad Resources Providers [Member]
Prepayment and deposit to suppliers, net	1,081	727
Other Deposits and Prepayments [Member]
Prepayment and deposit to suppliers, net	$ 312	$ 464