Note 17 - Warrant Liabilities (Tables)

9 Months Ended

Sep. 30, 2020

Notes Tables

Schedule of Warrant Liabilities [Table Text Block]

	As of	As of	As of	Change in Fair Value (gain)/loss
	September 30, 2020	June 30, 2020	December 31, 2019	Nine Months Ended September 30, 2020		Three Months Ended September 30, 2020
Fair value of the Warrants:
Investor warrants	-	13	71	(71	)	(13	)
Placement agent warrants	103	26	36	67		77
Warrant liabilities	103	39	107	(4	)	64

	As of	As of	As of	Change in Fair Value (gain)/loss
	September 30, 2019	June 30, 2019	December 31, 2018	Nine Months Ended September 30, 2019		Three Months Ended September 30, 2019
Fair value of the Warrants:
Investor warrants	200	32	503	(303	)	168
Placement agent warrants	55	103	103	(48	)	(48	)
Warrant liabilities	255	135	606	(351	)	120

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, 2020		774,000		0.63	$	1.4927		774,000		0.63	$	1.4927
Granted/Vested		-						-
Expired		(645,000	)					(645,000	)
Exercised		-						-
Balance, September 30, 2020 (Unaudited)		129,000		0.13	$	1.4927		129,000		0.13	$	1.4927

Warrant [Member]

Notes Tables

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

	Investors warrants								Placement agent warrants
	December 31, 2019			June 30, 2020			September 30, 2020 #		December 31, 2019			June 30, 2020			September 30, 2020
Stock price	$	1.17		$	1.00				$	1.17		$	1.00		$	2.02
Years to maturity		0.55			0.05					1.05			0.55			0.30
Risk-free interest rate		1.58	%		0.19	%				1.57	%		0.18	%		0.13	%
Dividend yield		-			-					-			-			-
Expected volatility		60	%		143	%				80	%		112	%		133	%
Exercise Price *	$	1.4927		$	1.4927				$	1.4927		$	1.4927		$	1.4927
Fair value of the warrant	$	0.11		$	0.02		$	-	$	0.28		$	0.20		$	0.80
Warrant Liabilities (US$'000)	$	71		$	13		$	-	$	36		$	26		$	103

	Investors warrants									Placement agent warrants
	December 31, 2018			June 30, 2019			September 30, 2019			December 31, 2018			June 30, 2019			September 30, 2019
Stock price	$	1.34		$	1.35		$	1.30		$	1.34		$	1.35		$	1.30
Years to maturity		1.55			1.05			0.80			2.05			1.55			1.30
Risk-free interest rate		2.50	%		1.73	%		1.79	%		2.50	%		1.73	%		1.57	%
Dividend yield		-			-			-			-			-			-
Expected volatility		199	%		90	%		82	%		176	%		202	%		83	%
Exercise Price	$	6.60		$	6.60		$	1.4927		$	6.60		$	6.60		$	1.4927
Fair value of the warrant	$	0.78		$	0.05		$	0.31		$	0.80		$	0.80		$	0.43
Warrant Liabilities (US$'000)	$	503		$	32		$	200		$	103		$	103		$	55