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v3.22.2.2

Note 13 - Warrant Liability (Tables) | 9 Months Ended
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Sep. 30, 2022
Notes Tables |
Schedule of Derivative Instruments [Table Text Block] |
|  | 2019 Domestic Warrants |  |  | 2019 Foreign Warrants |
Expected price volatility |  |  | 178 | % |  |  | 178 | %
Expected term (in years) |  |  | 4.57 |  |  |  | 4.57 |
Risk-free interest rate |  |  | 0.25 | % |  |  | 0.27 | %
Dividend yield |  |  | 0.00 | % |  |  | 0.00 | %
Weighted-average fair value of warrant |  | $ | 1.18 |  |  | $ | 1.54 |
Expected price volatility |  |  | 186 | %
Expected term (in years) |  |  | 4.05 |
Risk-free interest rate |  |  | 0.22 | %
Dividend yield |  |  | 0.00 | %
Weighted-average fair value of warrants |  | $ | 1.17 |
Expected price volatility |  |  | 79.6 | %
Expected term (in years) |  |  | 3.4 |
Risk-free interest rate |  |  | 3.58 | %
Dividend yield |  |  | 0.00 | %
Weighted-average fair value of warrants |  | $ | 0.10 |
Expected price volatility |  |  | 79.6 | %
Expected term (in years) |  |  | 3.3 |
Risk-free interest rate |  |  | 3.58 | %
Dividend yield |  |  | 0.00 | %
Weighted-average fair value of warrants |  | $ | 0.05 |
Expected price volatility |  |  | 84.9 | %
Expected term (in years) |  |  | 6.2 |
Risk-free interest rate |  |  | 1.29 | %
Dividend yield |  |  | 0.00 | %
Weighted-average fair value of warrants |  | $ | 0.38 |
Expected price volatility |  |  | 87 | %
Expected term (in years) |  |  | 6.0 |
Risk-free interest rate |  |  | 1.31 | %
Dividend yield |  |  | 0.00 | %
Weighted-average fair value of warrants |  | $ | 0.25 |
Expected price volatility |  |  | 79.6 | %
Expected term (in years) |  |  | 6.0 |
Risk-free interest rate |  |  | 3.43 | %
Dividend yield |  |  | 0.00 | %
Weighted-average fair value of warrants |  | $ | 0.13 |
Expected price volatility |  |  | 79.6 | %
Expected term (in years) |  |  | 6.0 |
Risk-free interest rate |  |  | 3.43 | %
Dividend yield |  |  | 0.00 | %
Weighted-average fair value of warrants |  | $ | 0.07 |
Expected price volatility |  |  | 79.6 | %
Expected term (in years) |  |  | 6.0 |
Risk-free interest rate |  |  | 3.43 | %
Dividend yield |  |  | 0.0 | %
Weighted-average fair value of warrants |  | $ | 0.13 |
Expected price volatility |  |  | 79.6 | %
Expected term (in years) |  |  | 6.0 |
Risk-free interest rate |  |  | 3.43 | %
Dividend yield |  |  | 0.0 | %
Weighted-average fair value of warrants |  | $ | 0.07 |

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- Definition Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=125515794&loc=d3e41620-113959 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=125515794&loc=d3e41638-113959 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=125515794&loc=d3e41678-113959 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=125515794&loc=d3e41641-113959 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5579240-113959 + Details
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