Note 14 - Taxation - Reconciliation of the Income Tax (Expense)/Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Pre-tax loss	$ (2,511)	$ (5,078)
U.S. federal rate	21.00%	21.00%
Income tax benefit computed at U.S. federal rate	$ 527	$ 1,066
Rate differential for foreign earnings	(131)	74
Preferential tax treatment effect		(205)
Tax effect on non-taxable change in fair value of warrant liabilities	2,379	137
Tax effect enactment of new tax rate of a VIE	683
Provision of valuation allowance on deferred tax assets	(2,312)	(917)
Expired tax attribute carryforwards	(1,358)	(372)
Tax effect on other non-deductible expenses/non-taxable income	35	74
Effective income tax expense	$ (177)	$ (143)