Note 16 - The Financing and Warrant Liabilities (Tables)

6 Months Ended

Jun. 30, 2021

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]

									Change in Fair Value (gain)/loss
		As of June 31, 2021		As of March 31, 2021		As of February 18, 2021		As of December 31, 2020	Six Months Ended June 30, 2021			Three Months Ended June 30, 2021
	(US$’000)		(US$’000)		(US$’000)		(US$’000)		(US$’000)			(US$’000)
Warrants issued in the February 2021 Financing:
--Investor Warrants		3,257		5,942		10,476		*		(7,219	)		(2,685	)
--Placement Agent Warrants		431		817		1,445		*		(1,014	)		(386	)
Warrants issued in the 2020 Financing:
--Investor Warrants		2,420		3,370		*		1,279		1,141			(950	)
--Placement Agent Warrants		423		590		*		224		199			(167	)
Warrants issued in the 2018 Financing:
--Placement Agent Warrants		66		200		*		2		64			(134	)
		6,597		10,919		11,921		1,505		(6,829	)		(4,322	)

							Change in Fair Value (gain)/loss
		As of June 30, 2020		As of March 31, 2020		As of December 31, 2019	Six Months Ended June 30, 2020			Three Months Ended June 30, 2020
	(US$’000)		(US$’000)		(US$’000)		(US$’000)			(US$’000)
Warrants issued in the 2018 Financing:
--Investor Warrants		13		45		71		(58	)		(32	)
--Placement Agent Warrants		26		16		36		(10	)		10
Warrant liabilities		39		61		107		(68	)		(22	)

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		2,159,865		2.78	$	2.00		129,000		0.05	$	1.4927
Granted/Vested		2,970,840		3.14	$	3.70		4,636,865		2.84	$	2.91
Forfeited		-						-
Exercised		-						-
Balance, June 30, 2021 (Unaudited)		5,130,705		2.79	$	2.98		4,765,865		2.76	$	2.87

Warrant [Member]

Notes Tables

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

	As of February 18, 2021
	2021 Investor Warrants			2021 Placement Agent Warrants
Stock price	$	4.48		$	4.48
Years to maturity		3.50			3.50
Risk-free interest rate		0.26	%		0.26	%
Dividend yield		-			-
Expected volatility		168	%		168	%
Exercise Price	$	3.59		$	4.4875
Fair value of the warrant	$	4.02		$	3.96
Warrant liabilities (US$’000)	$	10,476		$	1,445

	2021 Investor Warrants						2021 Placement Agent Warrants
	June 30, 2021			March 31, 2021			June 30, 2021			March 31, 2021
Stock price	$	2.00		$	2.64		$	2.00		$	2.64
Years to maturity		3.14			3.38			3.14			3.38
Risk-free interest rate		0.48	%		0.41	%		0.48	%		0.41	%
Dividend yield		-			-			-			-
Expected volatility		114	%		168	%		114	%		168	%
Exercise Price	$	3.59		$	3.59		$	4.4875		$	4.4875
Fair value of the warrant	$	1.25		$	2.28		$	1.18		$	2.24
Warrant liabilities (US$’000)	$	3,257		$	5,942		$	431		$	817

	2020 Investor Warrants and 2020 Placement Agent Warrants
	June 30, 2021			March 31, 2021			December 31, 2020
Stock price	$	2.00		$	2.64		$	1.35
Years to maturity		2.45			2.70			2.95
Risk-free interest rate		0.34	%		0.29	%		0.17	%
Dividend yield		-			-			-
Expected volatility		120	%		120	%		102	%
Exercise Price	$	2.03		$	2.03		$	2.03
Fair value of the warrant	$	1.40		$	1.95		$	0.74
Investor warrants liabilities (US$’000)	$	2,420		$	3,370		$	1,279
Placement agent warrants liabilities (US$’000)	$	423		$	590		$	224

	2018 Placement Agent Warrants
	June 30, 2021			March 31, 2021			December 31, 2020
Stock price	$	2.00		$	2.64		$	1.35
Years to maturity		0.05			0.30			0.05
Risk-free interest rate		0.04	%		0.03	%		0.08	%
Dividend yield		-			-			-
Expected volatility		74	%		206	%		59	%
Exercise Price	$	1.4927		$	1.4927		$	1.4927
Fair value of the warrant	$	0.51		$	1.55		$	0.02
Warrant liabilities (US$’000)	$	66		$	200		$	2

	2018 Investors warrants									2018 Placement agent warrants
	June 30, 2020			March 31, 2020			December 31, 2019			June 30, 2020			March 31, 2020			December 31, 2019
Stock price	$	1.00		$	0.95		$	1.17		$	1.00		$	0.95		$	1.17
Years to maturity		0.05			0.30			0.55			0.55			0.80			1.05
Risk-free interest rate		0.19	%		0.10	%		1.58	%		0.18	%		0.13	%		1.57	%
Dividend yield		-			-			-			-			-			-
Expected volatility		143	%		99	%		60	%		112	%		78	%		80	%
Exercise Price	$	1.4927		$	1.4927		$	1.4927		$	1.4927		$	1.4927		$	1.4927
Fair value of the warrant	$	0.02		$	0.07		$	0.11		$	0.20		$	0.12		$	0.28
Warrant Liabilities (US$’000)	$	13		$	45		$	71		$	26		$	16		$	36