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Note 6 - Long-term Debt | 3 Months Ended
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Mar. 31, 2024
Notes to Financial Statements |
Long-Term Debt [Text Block] | NOTE 6 – LONG-TERM DEBT 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 531,250 shares of Common Stock 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 “Note and Warrant Purchase Agreement”). The warrants issued in this transaction have an exercise price of $5.20 per share, a term of five years and are exercisable for cash at any time. The Notes originally had 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 28,846 warrants to the placement agent. The warrants issued in this transaction have an exercise price of $5.20 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 $3.44, exercise price of $5.20, 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 Notes. The warrants qualified for equity classification and were reported within Additional Paid-In Capital. On October 13, 2023, the Company and the Purchasers entered into an amendment to the Note and Warrant Purchase Agreement (the “Amendment”) and Allonge No. 1 to each of the Notes (collectively, the “Allonges”) effective as of September 30, 2023, pursuant to which the Company and the Purchasers extended the maturity date of the Notes from June 20, 2024, to January 1, 2026 (the “Extension”). As consideration for the Extension, simultaneously with the entry into the Amendment and Allonges, the Company issued to the Purchasers additional warrants to purchase an aggregate of 531,250 shares of Common Stock at an exercise price of $5.20 per share, subject to adjustment as provided therein (the “2023 Warrants”). The 2023 Warrants are exercisable at any time prior to the five-year anniversary of the initial exercise date of September 30, 2023. The Amendment qualifies as a modification and entitles the Purchasers to registration rights with respect to the shares of Common Stock issuable upon exercise of the 2023 Warrants pursuant to the existing Registration Rights Agreement, dated June 22, 2022, by and between the Company and the Purchasers. As a result of the amendment, the Company recorded an initial debt discount of $1,193,206, based on fair value of the warrants 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 5.0 years, stock price of $3.89, exercise price of $5.20, volatility of 73.66%, risk-free rate of 4.60%, and no forfeiture rate. The debt discount will be accreted according to the effective interest method over the contractual term of the Notes. The warrants qualified for equity classification and were reported within Additional Paid-In Capital. The components of notes payable are as follows:
|  | March 31, 2024 |  |  | December 31, 2023 |
Senior Promissory Notes |  | $ | 6,000,000 |  |  |  | 6,000,000 |
Less: unamortized debt discount |  |  | (1,165,949 | ) |  |  | (1,311,989 | )
Senior Promissory Notes payable |  | $ | 4,834,051 |  |  | $ | 4,688,011 |
Current portion of Senior Promissory Notes payable |  |  | - |  |  |  | - |
Senior Promissory Notes payable, less current portion |  |  | 4,834,051 |  |  |  | 4,688,011 |
Senior Promissory Notes payable |  | $ | 4,834,051 |  |  | $ | 4,688,011 |
For the three months ended March 31, 2024 and 2023, the Company recognized interest expense of $0 and $0, respectively, and $146,040 and $84,528, respectively on the Senior Promissory Notes related to the amortization of debt issuance costs.

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- Definition The entire disclosure for long-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 470 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/470/tableOfContent + Details
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