Note 16 - The Financing and Warrant Liabilities (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Allocation of Proceeds from Issuance of Equity [Table Text Block]

	Initial Measurement
	(USD’000)
Investor Warrants		10,476
Common Stock (par value and additional paid in capital)		8,235
Total proceeds from the Financing		18,711

Schedule of Warrant Liabilities [Table Text Block]

	As of December 31, 2022		As of December 31, 2021		Change in Fair Value (Gain)/Loss
	(US$’000)		(US$’000)		(US$’000)
Warrants issued in the 2021 Financing:
--Investor warrants		86		964		(878	)
--Placement agent warrants		9		132		(123	)
Warrants issued in the 2020 Financing:
--Investor warrants		76		795		(719	)
--Placement agent warrants		14		148		(134	)
Warrant liabilities		185		2,039		(1,854	)

	As of December 31, 2021		As of July 2, 2021		As of February 18, 2021		As of December 31, 2020		Change in Fair Value (Gain)/Loss
	(US$’000)		(US$’000)		(US$’000)		(US$’000)		(US$’000)
Warrants issued in the 2021 Financing:
--Investor warrants		964		*		10,476		*		(9,512	)
--Placement agent warrants		132		*		1,445		*		(1,313	)
Warrants issued in the 2020 Financing:
--Investor warrants		795		*		*		1,279		(484	)
--Placement agent warrants		148		*		*		224		(76	)
Warrants issued in the 2018 Financing:
--Placement agent warrants		-		58		*		2		56
Warrant liabilities		2,039						1,505		(11,329	)

Schedule of Warrant Activity [Table Text Block]

	Warrant Outstanding							Warrant Exercisable
	Number of underlying shares			Weighted Average Remaining Contractual Life (Years)		Weighted Average Exercise Price		Number of underlying shares			Weighted Average Remaining Contractual Life (Years)		Weighted Average Exercise Price
Balance, January 1, 2021		431,975			2.78	$	9.99		25,800			0.05	$	7.4635
Issued/Vested		594,168			2.63	$	18.50		1,000,343			2.36	$	15.11
Exercised		(25,800	)			$	7.4635		(25,800	)			$	7.4635
Balance, December 31, 2021		1,000,343			2.36	$	15.11		1,000,343			2.36	$	15.11
Issued/Vested		-							-
Exercised		-							-
Balance, December 31, 2022		1,000,343			1.36	$	15.11		1,000,343			1.36	$	15.11

Warrant [Member]

Notes Tables

Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]

	2021 Investors Warrants									2021 Placement Agent Warrants
	December 31, 2022			December 31, 2021			February 18, 2021*			December 31, 2022			December 31, 2021			February 18, 2021*
Stock price #	$	0.46		$	1.00		$	4.48		$	0.46		$	1.00		$	4.48
Years to maturity		1.63			2.63			3.50			1.63			2.63			3.50
Risk-free interest rate		4.625	%		0.87	%		0.26	%		4.625	%		0.87	%		0.26	%
Dividend yield		-			-			-			-			-			-
Expected volatility		99.74	%		115	%		168	%		99.74	%		115	%		168	%
Exercise Price #	$	3.59		$	3.59		$	3.59		$	4.4875		$	4.4875		$	4.4875
Fair value of the warrant	$	0.0329		$	0.37		$	4.02		$	0.0256		$	0.36		$	3.96
Warrant Liabilities (US$’000)	$	86		$	964		$	10,476		$	9		$	132		$	1,445

	2020 Investors Warrants									2020 Placement Agent Warrants
	December 31, 2022			December 31, 2021			December 31, 2020			December 31, 2022			December 31, 2021			December 31, 2020
Stock price #	$	0.46		$	1.00		$	1.35		$	0.46		$	1.00		$	1.35
Years to maturity		0.95			1.95			2.95			0.95			1.95			2.95
Risk-free interest rate		4.716	%		0.72	%		0.17	%		4.716	%		0.72	%		0.17	%
Dividend yield		-			-			-			-			-			-
Expected volatility		115.61	%		128	%		102	%		115.61	%		128	%		102	%
Exercise Price #	$	2.03		$	2.03		$	2.03		$	2.03		$	2.03		$	2.03
Fair value of the warrant	$	0.0439		$	0.46		$	0.74		$	0.0456		$	0.49		$	0.74
Warrant Liabilities (US$’000)	$	76		$	795		$	1,279		$	14		$	148		$	224

	2018 Placement Agent Warrants
	July 2, 2021*			December 31, 2020
Stock price #	$	1.94		$	1.35
Years to maturity		0.04			0.05
Risk-free interest rate		0.05	%		0.08	%
Dividend yield		-			-
Expected volatility		75	%		59	%
Exercise Price #	$	1.4927		$	1.4927
Fair value of the warrant	$	0.45		$	0.02
Warrant liabilities (US$’000)	$	58		$	2