Note 3 - Summary of Significant Accounting Policies - Contract liabilities (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Balance	$ 1,061
Exchange translation adjustment	(31)
Revenue recognized from beginning contract liability balances	(653)
Advances received from customers related to unsatisfied performance obligations	4,684
Balance	5,061
Total contract liabilities	1,061
Unrelated Parties [Member]
Balance	5,052
Total contract liabilities	5,052
Related Parties [Member]
Balance	9
Total contract liabilities	$ 9