Note 7 - Other Current Assets, Net - Summary of Other Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Other receivables, gross	$ 1,462	$ 728
Allowance for doubtful accounts		(717)
Other receivables, net	1,462	11
Staff Advances for Business Operations [Member]
Other receivables, gross	18	11
Allowance for doubtful accounts
Other receivables, net	18	11
Loan to Unrelated Party [Member]
Other receivables, gross	1,444
Allowance for doubtful accounts
Other receivables, net	1,444
Overdue Deposits [Member]
Other receivables, gross		717
Allowance for doubtful accounts		(717)
Other receivables, net