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Note 13 - Warrant Liability | 6 Months Ended
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Jun. 30, 2022
Notes to Financial Statements |
Other Liabilities Disclosure [Text Block] | NOTE 13. WARRANT LIABILITY 2019 Domestic Warrants, 2019 Foreign Warrants and 2019 Ladenburg Warrants As further described in Note 14, “Stockholders’ Equity”, the Company issued the 2019 Domestic Warrants, 2019 Foreign Warrants and 2019 Ladenburg Warrants in the third quarter of 2019. The terms of the 2019 Domestic Warrants, 2019 Foreign Warrants and 2019 Ladenburg Warrants all required potential cash-settlement in the event of a specified fundamental transaction. Under ASC 480, Distinguishing Liabilities from Equity, the warrants were classified as liabilities because the Company’s potential obligation to cash-settle the warrants was deemed to be beyond the Company’s control. The fair value of outstanding warrants was determined at each reporting date using a Black-Scholes option pricing model with the changes in fair value recorded in the consolidated statements of operations and comprehensive loss. Upon issuance in the third quarter of 2019, the fair value of the 2019 Domestic Warrants, 2019 Foreign Warrants and 2019 Ladenburg Warrants was determined to be $3.1 million, $2.0 million and $0.1 million, respectively. In the third quarter of 2020, as further described in Note 14, “Stockholders’ Equity”, the 2019 Domestic Warrants and 2019 Foreign Warrants were exercised at reduced exercise prices. The warrant liabilities associated with these warrants was adjusted to their fair values as of the date of exercise, with the change in fair values recorded in the consolidated statements of operations and comprehensive loss. The fair values were then transferred to equity. As of the date of exercise, the fair value of the 2019 Domestic Warrants and 2019 Foreign Warrants was determined to be $4.9 million and $4.2 million, respectively, in accordance with the following key assumptions:
Assumptions |  | 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 |
There were no 2019 Domestic Warrants or 2019 Foreign Warrants outstanding as of June 30, 2022. In the third quarter of 2020, as further described in Note 14, “Stockholders’ Equity”, the Company amended the 2019 Ladenburg Warrants. The Company’s potential obligation to cash-settle the warrants if a specified fundamental transaction occurred was amended to apply only in situations within the Company’s control. Pursuant to this change, the 2019 Ladenburg Warrants were no longer classified as liabilities. The warrant liability associated with the 2019 Ladenburg Warrants was adjusted to fair value as of the date of the amendment, with the change in fair value recorded in the consolidated statements of operations and comprehensive loss. The fair value was then transferred to equity. The fair value of the 2019 Ladenburg Warrants was determined to be $0.2 million on the date of amendment in accordance with the following key assumptions:
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 |
The 2019 Ladenburg Warrants will no longer be adjusted to fair value in reporting periods after the amendment. All 2019 Ladenburg Warrants remained outstanding as of June 30, 2022. November 2021 Warrants As further described in Note 14, “Stockholders’ Equity”, the Company issued the November 2021 Warrants in the fourth quarter of 2021. The terms of the November 2021 Warrants required that the Company obtain stockholder approval for an increase in authorized shares before they became exercisable. Under ASC 480, Distinguishing Liabilities from Equity, the November 2021 Warrants were classified as liabilities as of December 31, 2021 and until the November 2021 Warrants became exercisable. The November 2021 Warrants became exercisable subsequent to December 31, 2021, on January 31, 2022. On January 31, 2022, our stockholders met and approved the necessary increase in authorized share capital available to meet the assumed exercise or conversion of the November 2021 Warrants and Preferred Stock. On January 31, 2022, as a result of the stockholder approval of the increase in authorized share capital, the warrants issued in November 2021 became exercisable and were reclassified from a liability to equity because the warrants require physical settlement or net share settlement. Accordingly, there is no fair value of warrant liabilities recorded in the Company’s condensed consolidated balance sheet as of June 30, 2022. Upon issuance, the fair value of the November 2021 Warrants was determined to be $14.2 million in accordance with the following key assumptions as of November 2, 2021:
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 |
As of December 31, 2021, the fair value of the November 2021 Warrants was determined to be $9.6 million in accordance with the following key assumptions:
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 |

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- Definition The entire disclosure for other liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20,24) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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