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Note 16 - The Financing and Warrant Liabilities (Tables) | 6 Months Ended
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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 |

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