Note 10 - Taxation (Details Textual) xbrli-pure in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)
Effective Income Tax Rate Reconciliation, Percent, Total	0.00%
Operating Loss Carryforwards, Total	$ 6.2
Minimum [Member]
Operating Loss Carryforwards, Expiration Term	12 years
Maximum [Member]
Operating Loss Carryforwards, Expiration Term	18 years