Note 2 - Variable Interest Entities - Consolidated VIEs' Assets and Liabilities (Details) - USD ($) $ in Thousands		Jun. 30, 2021		Dec. 31, 2020
Cash and cash equivalents	[1]	$ 11,752		$ 4,297
Accounts receivable, net	[1]	3,707		2,407
Prepayment and deposit to suppliers	[1]	8,035		4,657
Due from related parties	[1]	104		61
Other current assets	[1]	462		1,462
Total current assets		24,060	[1]	12,884
Long-term investments	[1]	450		67
Operating Lease, Right-of-Use Asset	[1]	2,107		48
Property and equipment, net *	[1]	116		60
Intangible assets, net	[1]	3,438		2,557
Long-term deposits and prepayments	[1]	1,716		39
Deferred tax assets, net	[1]	652		606
Total Assets		36,948		20,667
Accounts payable	[1]	1,015		608
Advance from customers	[1]	1,539		1,436
Accrued payroll and other accruals	[1]	280		489
Taxes payable	[1]	3,408		3,430
Operating lease liabilities	[1]	187		18
Lease payment liability related to short-term leases	[1]	151		203
Other current liabilities	[1]	267		333
Total current liabilities		13,444		8,022
Operating lease liabilities-Non current	[2]	1,979		32
Total Liabilities		15,558		8,188
Variable Interest Entity, Primary Beneficiary [Member]
Cash and cash equivalents		485		277
Accounts receivable, net		3,321		1,142
Prepayment and deposit to suppliers		3,022		2,818
Due from related parties		104		61
Other current assets		3		10
Total current assets		6,935		4,308
Long-term investments		450		67
Operating Lease, Right-of-Use Asset		26		48
Property and equipment, net *		90		32
Intangible assets, net		0		9
Long-term deposits and prepayments		85		0
Deferred tax assets, net		439		536
Total Assets		8,025		5,000
Accounts payable		1,015		270
Advance from customers		1,397		1,436
Accrued payroll and other accruals		93		168
Taxes payable		2,729		2,755
Operating lease liabilities		9		18
Lease payment liability related to short-term leases		109		108
Other current liabilities		55		213
Total current liabilities		5,407		4,968
Operating lease liabilities-Non current		9		32
Total Liabilities		$ 5,416		$ 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).

[2] 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).