Note 7 - Other Current Assets, Net - Summary of Other Receivables (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Other receivables, gross	$ 1,695	$ 728
Allowance for doubtful accounts	(734)	(717)
Other receivables, net	961	11
Staff Advances for Business Operations [Member]
Other receivables, gross	17	11
Allowance for doubtful accounts
Other receivables, net	17	11
Loan to Unrelated Party [Member]
Other receivables, gross	944
Allowance for doubtful accounts
Other receivables, net	944
Overdue Deposits [Member]
Other receivables, gross	734	717
Allowance for doubtful accounts	(734)	(717)
Other receivables, net