Note 15 - The Financing and Warrant Liabilities - Warrant Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Warrant Liabilities (US$’000)	$ 0	$ 185	$ 2,039
Change in Fair Value (Gain)/Loss	(185)	(1,854)
Investor Warrants Issued in Connection with 2021 Financing [Member]
Warrant Liabilities (US$’000)	0	86	964
Change in Fair Value (Gain)/Loss	(86)	(878)
Placement Agent Warrants Issued in Connection with 2021 Financing [Member]
Warrant Liabilities (US$’000)	0	9	132
Change in Fair Value (Gain)/Loss	(9)	(123)
Investor Warrants Issued in Connection with 2020 Financing [Member]
Warrant Liabilities (US$’000)		76	795
Change in Fair Value (Gain)/Loss	(76)	(719)
Placement Agent Warrants Issued in Connection with 2020 Financing [Member]
Warrant Liabilities (US$’000)	0	14	$ 148
Change in Fair Value (Gain)/Loss	$ (14)	$ (134)