Note 2 - Variable Interest Entities - Consolidated VIEs' Assets and Liabilities (Details) - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Cash and cash equivalents		$ 8,731	$ 4,297
Accounts receivable, net		2,669	2,407
Prepayment and deposit to suppliers		8,673	4,657
Due from related parties		96	61
Other current assets		1,658	1,462
Total current assets		21,827	12,884
Long-term investments		1,911	67
Operating Lease, Right-of-Use Asset		2,042	48
Property and equipment, net *		190	60
Intangible assets, net		3,275	2,557
Long-term deposits and prepayments		481	39
Deferred tax assets, net		781	606
Total Assets		34,915	20,667
Accounts payable		750	608
Advance from customers		1,311	1,436
Accrued payroll and other accruals		350	489
Taxes payable		3,414	3,430
Operating lease liabilities		193	18
Lease payment liability related to short-term leases		150	203
Other current liabilities		136	333
Total current liabilities		9,990	8,022
Operating lease liabilities-Non current	[1]	1,923	32
Total Liabilities		12,048	8,188
Variable Interest Entity, Primary Beneficiary [Member]
Cash and cash equivalents		143	277
Accounts receivable, net		2,155	1,142
Prepayment and deposit to suppliers		4,233	2,818
Due from related parties		96	61
Other current assets		3	10
Total current assets		6,630	4,308
Long-term investments		449	67
Operating Lease, Right-of-Use Asset		23	48
Property and equipment, net *		86	32
Intangible assets, net		0	9
Long-term deposits and prepayments		88	0
Deferred tax assets, net		436	536
Total Assets		7,712	5,000
Accounts payable		750	270
Advance from customers		1,108	1,436
Accrued payroll and other accruals		75	168
Taxes payable		2,737	2,755
Operating lease liabilities		9	18
Lease payment liability related to short-term leases		109	108
Other current liabilities		73	213
Total current liabilities		4,861	4,968
Operating lease liabilities-Non current		10	32
Total Liabilities		$ 4,871	$ 5,000

[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).