Note 16 - The Financing and Warrant Liabilities (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

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

	Valuation techniques	Unobservable inputs	Value/Range of Inputs
		Remaining useful life (years)		7.75
Intangible assets	Multi-period Excess Earning	Discount rate		24%
		Contributory asset charge	8.9%	-	24%
		Base projection period (years)		5
Goodwill	Discounted Cash Flow	Discount rate		20%
		Terminal growth rate		3.50%

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

	Initial measurement
	US$(’000)
Investor warrants		1,890
Common Stock (par value and additional paid-in capital)		9,183
Total proceeds from the 2018 Financing		11,073

Schedule of Warrant Liabilities [Table Text Block]

	As of		As of		As of		Change in Fair Value (gain)/loss
	December 31,		December 31,		January 31,		Year ended December 31,
	2019		2018		2018		2019			2018
	(US$’000)		(US$’000)		(US$’000)		(US$’000)			(US$’000)
Fair value of the Warrants:
Investor warrants		71		503		1,890		(432	)		(1,387	)
Placement agent warrants		36		103		385		(67	)		(282	)
Warrant liabilities		107		606		2,275		(499	)		(1,669	)

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, 2018		-						-
Issued		774,000		2.58	$	6.60		774,000		2.58	$	6.60
Expired		-						-
Exercised		-						-
Balance, December 31, 2018		774,000		1.63	$	6.60		774,000		1.63	$	6.60
Issued		-						-
Expired		-						-
Exercised		-						-
Balance, December 31, 2019		774,000		0.63	$	1,4927		774,000		0.63	$	1,4927

Warrant [Member]

Notes Tables

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

	Investors Warrants			Placement Agent Warrants
Stock price	$	3.98		$	3.98
Years to maturity		2.50			3.00
Risk-free interest rate		2.22	%		2.39	%
Dividend yield		-			-
Expected volatility		158	%		147	%
Exercise Price	$	6.60		$	6.60
Fair value of the warrant	$	2.93		$	2.99
Warrant liabilities as of the closing date US$(’000)	$	1,890		$	385

	Investors warrants									Placement agent warrants
	January 17, 2018			December 31, 2018			December 31, 2019			January 17, 2018			December 31, 2018			December 31, 2019
Stock price	$	3.98		$	1.34		$	1.17		$	3.98		$	1.34		$	1.17
Years to maturity		2.50			1.55			0.55			3.00			2.05			1.05
Risk-free interest rate		2.22	%		2.50	%		1.58	%		2.39	%		2.50	%		1.57	%
Dividend yield		-			-			-			-			-			-
Expected volatility		158	%		199	%		60	%		147	%		176	%		80	%
Exercise Price	$	6.60		$	6.60		$	1.4927	*	$	6.60		$	6.60		$	1.4927	*
Fair value of the warrant	$	2.93		$	0.78		$	0.11		$	2.99		$	0.80		$	0.28
Warrant liabilities US$(’000)	$	1,890		$	503		$	71		$	385		$	103		$	36