Note 2 - Variable Interest Entities - Consolidated VIEs' Assets and Liabilities (Details) - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents		$ 1,483	$ 3,742	$ 7,503	$ 2,952
Accounts receivable, net		6,830	6,359
Prepayment and deposit to suppliers		2,079	2,154
Due from related parties, net		207	226
Other current assets, net		9	19
Total current assets		10,608	12,500
Long-term investments		36
Property and equipment, net		112	142
Intangible assets, net		41	45
Operating lease right-of-use assets		20
Deferred tax assets, net		527	556
Total Assets		15,075	16,989
Current liabilities:
Short-term Bank Loans and Notes Payable	[1]	891	874
Accounts payable	[1]	1,165	2,869
Advances from customers	[1]	1,644	1,061
Accrued payroll and other accruals	[1]	411	521
Taxes payable	[1]	3,120	2,997
Other current liabilities		127	118
Total current liabilities		7,358	8,440
Total Liabilities		8,444	9,174
VIEs [Member]
Current assets:
Cash and cash equivalents		673	2,328
Accounts receivable, net		6,830	6,359
Prepayment and deposit to suppliers		1,716	1,724
Due from related parties, net		7	26
Other current assets, net		4	11
Total current assets		9,230	10,448
Long-term investments		36
Property and equipment, net		68	84
Intangible assets, net		38	42
Operating lease right-of-use assets		20
Deferred tax assets, net		527	556
Total Assets		9,919	11,130
Current liabilities:
Short-term Bank Loans and Notes Payable		891	874
Accounts payable		1,164	2,868
Advances from customers		1,642	1,059
Accrued payroll and other accruals		179	155
Taxes payable		2,677	2,562
Other current liabilities		65	55
Total current liabilities		6,618	7,573
Total Liabilities		$ 6,618	$ 7,573

[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).