XML 30 R14.htm IDEA: XBRL DOCUMENT
v3.24.1

Note 8 - Warrants to Purchase Common Stocks | 12 Months Ended
--- | ---
Dec. 31, 2023
Notes to Financial Statements |
Outstanding Warrants [Text Block] | 8. Warrants to Purchase Common Stock During 2023, the Company granted the following warrants: ● A warrant issued to a vendor exercisable for the purchase of 100,000 shares at an exercise price of $2.50 per share with a two-year term. This warrant was exercised in 2023 using cashless exercise resulting in the issuance of 62,293 shares of common stock. ● Warrants issued to the Company's senior lender exercisable for 160,000 shares of the Company's common stock at an exercise price of $2.00 per share with a five-year term. These warrants are outstanding as of December 31, 2023. ● In connection with a credit line increase, a warrant issued to the Company's senior lender was automatically modified to increase the number of shares that may be purchased by 25,000 shares. The warrant has an exercise price of $10.20 per share and a remaining term of about 3 years. ● Warrants issued to subordinated lenders exercisable for 226,666 at an exercise price of $0.01 per share and a term of two years. These warrants were exercised in 2023 with a combination of cashless exercise and cash payments. The following table shows the weighted average fair value calculations for warrants granted based on the listed weighted average assumptions:
Description |  | For the year ended December 31, |
|  | 2023 |  |  | 2022 |
Dividend-yield |  |  | 0 | % |  |  | 0 | %
Risk-free interest rate |  |  | 3.85 | % |  |  | 1.75 | %
Expected volatility |  |  | 117.90 | % |  |  | 151.41 | %
Expected life (years) |  |  | 5 |  |  |  | 3 |
Exercise price per share |  | $ | 1.62 |  |  | $ | 10.47 |
Market value per share on grant date |  | $ | 4.13 |  |  | $ | 11.29 |
Fair value per share on grant date |  | $ | 3.92 |  |  | $ | 9.68 |
A summary of historical warrant activity for the years ended December 31, 2023 and 2022 follows:
|  | Warrants Outstanding & Exercisable |  |  | Weighted - Average Exercise Price |  |  | Average Remaining Term in Years |
Outstanding December 31, 2021 |  |  | 55 |  |  | $ | 2.59 |  |  |  | 4.95 |
Granted |  |  | 527 |  |  |  | 10.47 |  |  |  |  |
Exercised |  |  | (227 | ) |  |  | 0.01 |  |  |  |  |
Outstanding December 31, 2022 |  |  | 355 |  |  | $ | 15.92 |  |  |  | 7.48 |
Granted |  |  | 511 |  |  |  | 1.62 |  |  |  |  |
Exercised |  |  | (336 | ) |  |  | 0.83 |  |  |  |  |
Outstanding December 31, 2023 |  |  | 530 |  |  | $ | 11.70 |  |  |  | 5.77 |
All of the above outstanding warrants are vested and exercisable as of December 31, 2023.

X
- Definition Disclosure of outstanding warrants. + References No definition available. + Details
Name: | amtx_OutstandingWarrantsTextBlock
Namespace Prefix: | amtx_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DisclosureTextBlockAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration