Note 3 - Summary of Significant Accounting Policies (Details Textual) - USD ($) |
3 Months Ended | |
|---|---|---|
Mar. 31, 2022 |
Mar. 31, 2021 |
|
| General and Administrative Expense [Member] | ||
| Patent Expense | $ 64,000 | $ 48,000 |
| X | ||||||||||
- Definition The amount of expense associated with gaining and maintaining certain patents. No definition available.
|
| X | ||||||||||
- Details
|