Note 18 - Taxation - Reconciliation of the Income Tax (Expense)/Benefit (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Pre-tax loss	$ (8,861)	$ (644)	$ (9,435)	$ (1,713)
U.S. federal rate	21.00%	35.00%	21.00%	35.00%	35.00%
Income tax benefit computed at U.S. federal rate	$ 1,861	$ 225	$ 1,981	$ 600
Rate differential for PRC earnings	324	(42)	398	(135)
Preferential tax treatment effect	(55)	42	(107)	26
Tax effect on non-taxable change in fair value of warrant liabilities	(111)		199
Tax effect on non-deductible impairment on goodwill	(1,353)		(1,353)
Valuation allowance on deferred tax assets	(1,311)	(350)	(1,167)	(622)
Expired tax attribute carryforwards			(556)
Others	(48)	12	(84)	18
Effective income tax expense	$ (693)	$ (113)	$ (689)	$ (113)