Note 5 - Other Receivables, Net - Summary of Other Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Other receivables, gross	$ 1,784	$ 3,539
Allowance for doubtful accounts	(1,765)	(893)
Other receivables, net	19	2,646
Short-term Working Capital Loan to an Unrelated Third Party [Member]
Other receivables, gross	146	2,602
TV Advertisement Deposit and Prepayment [Member]
Other receivables, gross	19	44
Overdue Deposits [Member]
Other receivables, gross	$ 1,619	$ 893