Note 14 - The Financing and Warrant Liabilities- Fair Value of Warrants (Details) $ in Thousands	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jun. 30, 2023 USD ($) yr	Mar. 31, 2023 USD ($) yr	Dec. 31, 2022 USD ($) yr
Warrant liabilities	$ 0	$ 0	$ 0	$ 13	$ 84	$ 185
Warrant Liabilities (US$’000)	0	0	0	13	84	185
Investor Warrants Issued in Connection with 2021 Financing [Member]
Warrant liabilities	0	0	0	12	49	86
Warrant Liabilities (US$’000)	0	0	0	12	49	86
Investor Warrants Issued in Connection with 2020 Financing [Member]
Warrant liabilities	0	0	0	0	25	76
Warrant Liabilities (US$’000)	0	0	0	0	25	76
Placement Agent Warrants Issued in Connection with 2021 Financing [Member]
Warrant liabilities	0	0	0	1	5	9
Warrant Liabilities (US$’000)	0	0	0	1	5	9
Placement Agent Warrants Issued in Connection with 2020 Financing [Member]
Warrant liabilities	0	0	0	0	5	14
Warrant Liabilities (US$’000)	$ 0	$ 0	$ 0	$ 0	$ 5	$ 14
Measurement Input, Share Price [Member] | Investor Warrants Issued in Connection with 2021 Financing [Member]
Warrant, measurement input	0.76	1.02	0.83	1.27	1.7	0.46
Measurement Input, Share Price [Member] | Investor Warrants Issued in Connection with 2020 Financing [Member]
Warrant, measurement input				1.27	1.7	0.46
Measurement Input, Share Price [Member] | Placement Agent Warrants Issued in Connection with 2021 Financing [Member]
Warrant, measurement input	0.76	1.02	0.83	1.27	1.7	0.46
Measurement Input, Share Price [Member] | Placement Agent Warrants Issued in Connection with 2020 Financing [Member]
Warrant, measurement input				1.27	1.7	0.46
Measurement Input, Expected Term [Member] | Investor Warrants Issued in Connection with 2021 Financing [Member]
Warrant, measurement input	0.1	0.4	0.6	1.13	1.38	1.63
Measurement Input, Expected Term [Member] | Investor Warrants Issued in Connection with 2020 Financing [Member]
Warrant, measurement input | yr				0.45	0.7	0.95
Measurement Input, Expected Term [Member] | Placement Agent Warrants Issued in Connection with 2021 Financing [Member]
Warrant, measurement input	0.1	0.4	0.6	1.13	1.38	1.63
Measurement Input, Expected Term [Member] | Placement Agent Warrants Issued in Connection with 2020 Financing [Member]
Warrant, measurement input | yr				0.45	0.7	0.95
Measurement Input, Risk Free Interest Rate [Member] | Investor Warrants Issued in Connection with 2021 Financing [Member]
Warrant, measurement input	0.0547	0.0539	0.0513	0.0534	0.0444	0.04625
Measurement Input, Risk Free Interest Rate [Member] | Investor Warrants Issued in Connection with 2020 Financing [Member]
Warrant, measurement input				0.0546	0.048	0.04716
Measurement Input, Risk Free Interest Rate [Member] | Placement Agent Warrants Issued in Connection with 2021 Financing [Member]
Warrant, measurement input	0.0547	0.0539	0.0513	0.0534	0.0444	0.04625
Measurement Input, Risk Free Interest Rate [Member] | Placement Agent Warrants Issued in Connection with 2020 Financing [Member]
Warrant, measurement input				0.0546	0.048	0.04716
Measurement Input, Expected Dividend Rate [Member] | Investor Warrants Issued in Connection with 2021 Financing [Member]
Warrant, measurement input	0	0	0	0	0	0
Measurement Input, Expected Dividend Rate [Member] | Investor Warrants Issued in Connection with 2020 Financing [Member]
Warrant, measurement input				0	0	0
Measurement Input, Expected Dividend Rate [Member] | Placement Agent Warrants Issued in Connection with 2021 Financing [Member]
Warrant, measurement input	0	0	0	0	0	0
Measurement Input, Expected Dividend Rate [Member] | Placement Agent Warrants Issued in Connection with 2020 Financing [Member]
Warrant, measurement input				0	0	0
Measurement Input, Price Volatility [Member] | Investor Warrants Issued in Connection with 2021 Financing [Member]
Warrant, measurement input	0.75	1.11	0.82	1.12	1.13	0.9974
Measurement Input, Price Volatility [Member] | Investor Warrants Issued in Connection with 2020 Financing [Member]
Warrant, measurement input				0.94	1.25	1.1561
Measurement Input, Price Volatility [Member] | Placement Agent Warrants Issued in Connection with 2021 Financing [Member]
Warrant, measurement input	0.75	1.11	0.82	1.12	1.13	0.9974
Measurement Input, Price Volatility [Member] | Placement Agent Warrants Issued in Connection with 2020 Financing [Member]
Warrant, measurement input				0.94	1.25	1.1561
Measurement Input, Exercise Price [Member] | Investor Warrants Issued in Connection with 2021 Financing [Member]
Warrant, measurement input	17.95	17.95	17.95	17.95	17.95	3.59
Measurement Input, Exercise Price [Member] | Investor Warrants Issued in Connection with 2020 Financing [Member]
Warrant, measurement input				10.15	10.15	2.03
Measurement Input, Exercise Price [Member] | Placement Agent Warrants Issued in Connection with 2021 Financing [Member]
Warrant, measurement input	22.4375	22.4375	22.4375	22.4375	22.4375	4.4875
Measurement Input, Exercise Price [Member] | Placement Agent Warrants Issued in Connection with 2020 Financing [Member]
Warrant, measurement input				10.15	10.15	2.03
Measurement Input, Quoted Price [Member] | Investor Warrants Issued in Connection with 2021 Financing [Member]
Warrant, measurement input	0	0	0	0.0232	0.0937	0.0329
Measurement Input, Quoted Price [Member] | Investor Warrants Issued in Connection with 2020 Financing [Member]
Warrant, measurement input				0	0.0731	0.0439
Measurement Input, Quoted Price [Member] | Placement Agent Warrants Issued in Connection with 2021 Financing [Member]
Warrant, measurement input	0	0	0	0.0157	0.0727	0.0256
Measurement Input, Quoted Price [Member] | Placement Agent Warrants Issued in Connection with 2020 Financing [Member]
Warrant, measurement input				0	0.076	0.0456