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Note 6 - Long-term Debt | 3 Months Ended
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Mar. 31, 2023
Notes to Financial Statements |
Long-Term Debt [Text Block] | NOTE 6 – LONG-TERM DEBT Convertible Note On March 24, 2021, the Company entered into a Securities Purchase Agreement with an institutional investor pursuant to which the Company agreed to issue and sell a $15.0 million principal amount senior convertible note (the “Convertible Note”) maturing on October 1, 2023 and 80,000 shares of our common stock, $0.001 par value (“Common Stock”), for an aggregate purchase price of $15.0 million upon the satisfaction of the closing conditions set forth in the Securities Purchase Agreement. The Closing occurred on April 8, 2021, and the Company issued to the Investor the securities in connection with the Closing. The Convertible Note was a senior, unsecured obligation of the Company, payable at 112% of the principal amount at maturity ( October 1, 2023), or earlier upon redemption or repurchase as set forth in the Convertible Note. The Convertible Note was convertible into shares of Common Stock pursuant to the terms of the Convertible Note, in part or in whole, from time to time, at the election of the Investor. The initial conversion rate was 100.6749 shares of Common Stock per $1,000 of principal amount of the Convertible Note. The conversion rate was subject to anti-dilution adjustments, including for stock dividends, splits, and combinations; issuances of options, warrants, or similar rights; spin-offs and distributions of property; cash dividends or distributions; and tender or exchange offers, in each case as further described in and pursuant to the terms of the Convertible Note. Beginning on March 1, 2022, and on the first day of each calendar month thereafter, at the election of the Investor or Holder, if applicable, the Company was required to redeem $840,000 of the amounts due under the Convertible Note in cash or Common Stock at 90% of the lesser of (i) the volume-weighted average price (“VWAP”) of the Common Stock on the trading day immediately preceding the payment date and (ii) the average of the lowest three (3) VWAPs over the 10 trading days immediately preceding the payment date, which shall in no case be less than the floor price of $1.75 per share. Beginning on March 1, 2022, the Company paid the first monthly installment of $840,000 in cash. As of June 22, 2022, the Convertible Note, including accrued interest and all relevant obligations, was repaid in full, amounting to $13,446,875, allocated between a principal repayment of $11,640,000 and contractual repayment premium of $1,806,875. The components of the Convertible Note are as follows:
|  | March 31, 2023 |  |  | March 31, 2022 |
Convertible note |  | $ | - |  |  |  | 15,960,000 |
Less: unamortized debt issuance costs |  |  | - |  |  |  | (1,915,726 |
Convertible note payable |  | $ | - |  |  | $ | 14,044,274 |
Current portion of convertible note payable |  |  | - |  |  |  | 10,080,000 |
Convertible note payable, less current portion |  |  | - |  |  |  | 3,964,273 |
Convertible note payable |  | $ | - |  |  | $ | 14,044,274 |
For the three months ended March 31, 2023 and 2022, the Company recognized interest expense of $0 and $187,500, respectively, and $0 and $297,338, respectively, related to the amortization of debt issuance costs. Senior Promissory Notes On June 22, 2022, the Company issued and sold Senior Promissory Notes in an aggregate principal amount of $6.0 million (the "Notes") and issued warrants to purchase 4,250,000 shares of common stock of the Company to affiliates of Bleichroeder L.P., 21 April Fund, L.P., and 21 April Fund, Ltd. (together, the "Purchasers"), pursuant to a note and warrant purchase agreement entered into with the Purchasers. The Notes have a term of 24 months and do not bear interest during this period. If the notes are not repaid on or before the second anniversary of issuance, however, the Notes will thereafter bear interest of 10% per annum, which will increase by 1% each month the Notes remain unpaid, up to a maximum of 16% per annum, payable monthly. Additionally, as part of the transaction, the Company issued 230,000 warrants to the placement agent. All of the warrants issued in this transaction have an exercise price of $0.65 per share, a term of five years and are exercisable for cash at any time. As a result, the Company recorded an initial debt discount of $695,749, based on the relative fair value of the warrants and notes issued. The Company determined the fair value of the warrants by using the Black-Scholes Option Pricing Model, with the following assumptions: expected term of 2.5 years, stock price of $0.43, exercise price of $0.65, volatility of 80.8%, risk-free rate of 3.13%, and no forfeiture rate. The debt discount will be accreted according to the effective interest method over the contractual term of the note. The warrants qualified for equity classification and were reported within Additional Paid-In Capital. The components of notes payable are as follows:
|  | March 31, 2023 |  |  | December 31, 2022 |
Senior Promissory Notes |  | $ | 6,000,000 |  |  |  | 6,000,000 |
Less: unamortized debt discount |  |  | (435,158 | ) |  |  | (519,686 | )
Senior Promissory Notes payable |  | $ | 5,564,842 |  |  | $ | 5,480,314 |
Current portion of Senior Promissory Notes payable |  |  | - |  |  |  | - |
Senior Promissory Notes payable, less current portion |  |  | 5,564,842 |  |  |  | 5,480,314 |
Senior Promissory Notes payable |  | $ | 5,564,842 |  |  | $ | 5,480,314 |
For the three months ended March 31, 2023 and 2022, the Company recognized interest expense of $0 and $0, respectively, and $84,528 and $0, respectively on the Senior Promissory Notes, related to the amortization of debt issuance costs.

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