Note 13 - Short-term Bank Loan and Credit Facility (Details Textual) $ in Thousands, ¥ in Millions		Sep. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)
Short-term Bank Loans and Notes Payable	[1]		$ 430
Revolving Credit Facility [Member] | Loans Payable [Member]
Line of Credit Facility, Maximum Borrowing Capacity			700	¥ 5
Short-term Bank Loans and Notes Payable			$ 430	¥ 3

[1] All of the VIEs' assets can be used to settle obligations of their primary beneficiary. Furthermore, liabilities recognized as a result of consolidating these VIEs do not represent additional claims on the Company's general assets (Note 2).