Note 4 - Fair Value Measurements - Fair Value, Assets Measured on Recurring Basis (Details) - USD ($) |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|
| Derivatives | $ 0 | $ 1,376 |
| Fair Value, Recurring [Member] | ||
| Derivatives | 0 | 1,376 |
| Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | ||
| Derivatives | 0 | 0 |
| Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | ||
| Derivatives | 0 | 0 |
| Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | ||
| Derivatives | 0 | $ 1,376 |
| Fair Value, Recurring [Member] | Money Market Funds [Member] | ||
| Money market funds | 300,000 | |
| Fair Value, Recurring [Member] | Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member] | ||
| Money market funds | 300,000 | |
| Fair Value, Recurring [Member] | Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member] | ||
| Money market funds | 0 | |
| Fair Value, Recurring [Member] | Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member] | ||
| Money market funds | $ 0 |