Note 2 - Variable Interest Entities - Consolidated VIEs' Assets and Liabilities (Details) - USD ($) $ in Thousands		Dec. 31, 2020	Dec. 31, 2019
Cash and cash equivalents *	[1]	$ 4,297	$ 1,603
Accounts receivable, net	[1]	2,407	3,260
Prepayment and deposit to suppliers	[1]	4,657	6,980
Due from related parties, net *	[1]	61	81
Other current assets, net	[1]	1,462	11
Total current assets		12,884	11,935
Long-term investments	[1]	67	35
Operating lease right-of-use assets *	[1]	48	12
Property and equipment, net *	[1]	60	78
Intangible assets, net	[1]	2,557	1,899
Deferred tax assets	[1]	606	713
Total assets		20,667	18,551
Short-term Bank Loans and Notes Payable	[1]		430
Accounts payable	[1]	608	408
Advances from customers	[1]	1,436	2,006
Accrued payroll and other accruals	[1]	489	491
Taxes payable	[1]	3,430	3,214
Operating lease liabilities		18
Short-term Lease Liability		203	136
Other current liabilities	[1]	333	221
Total current liabilities		8,022	7,013
Operating lease liabilities-Non current		32
Total Liabilities		8,188	7,138
Variable Interest Entity, Primary Beneficiary [Member]
Cash and cash equivalents *		277	699
Accounts receivable, net		1,142	2,876
Prepayment and deposit to suppliers		2,818	3,998
Due from related parties, net *		61	81
Other current assets, net		10	6
Total current assets		4,308	7,660
Long-term investments		67	35
Operating lease right-of-use assets *		48	12
Property and equipment, net *		32	40
Intangible assets, net		9	25
Deferred tax assets		536	713
Total assets		5,000	8,485
Short-term Bank Loans and Notes Payable			430
Accounts payable		270	408
Advances from customers		1,436	2,006
Accrued payroll and other accruals		168	132
Taxes payable		2,755	2,568
Operating lease liabilities		18
Short-term Lease Liability		108	19
Other current liabilities		213	84
Total current liabilities		4,968	5,647
Operating lease liabilities-Non current		32
Total Liabilities		$ 5,000	$ 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).