Note 2 - Variable Interest Entities - Consolidated VIEs' Assets and Liabilities (Details) - USD ($) $ in Thousands		Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents		$ 1,055	$ 1,603
Accounts receivable, net		2,520	3,260
Prepayment and deposit to suppliers		5,078	6,980
Due from related parties, net		52	81
Other current assets, net		959	11
Total current assets		9,664	11,935
Long-term investments		61	35
Operating lease right-of-use assets		7	12
Property and equipment, net		73	78
Intangible assets, net		1,493	1,899
Deferred tax assets, net		691	713
Total assets		17,074	18,551
Current liabilities:
Short-term Bank Loans and Notes Payable	[1]		430
Accounts payable	[1]	395	408
Advance from customers	[1]	1,619	2,006
Accrued payroll and other accruals	[1]	431	491
Taxes payable	[1]	3,258	3,214
Lease payment liability related to a short-term lease	[1]	177	136
Other current liabilities	[1]	446	221
Total current liabilities		6,365	7,013
Total Liabilities		6,489	7,138
Variable Interest Entity, Primary Beneficiary [Member]
Current assets:
Cash and cash equivalents		1,012	699
Accounts receivable, net		1,534	2,876
Prepayment and deposit to suppliers		2,733	3,998
Due from related parties, net		52	81
Other current assets, net		8	6
Total current assets		5,339	7,660
Long-term investments		61	35
Operating lease right-of-use assets		7	12
Property and equipment, net		38	40
Intangible assets, net		16	25
Deferred tax assets, net		691	713
Total assets		6,152	8,485
Current liabilities:
Short-term Bank Loans and Notes Payable			430
Accounts payable		208	408
Advance from customers		1,357	2,006
Accrued payroll and other accruals		173	132
Taxes payable		2,561	2,568
Lease payment liability related to a short-term lease		30	19
Other current liabilities		227	84
Total current liabilities		4,556	5,647
Total Liabilities		$ 4,556	$ 5,647

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