Note 7 - Inventory (Details Textual) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Raw Materials [Member] | ||
| Inventory, Allocated to Manufacturing Process Development Expense | $ 28,000 | $ 11,000 |
| Finished Goods [Member] | ||
| Inventory, Allocated to Research and Development Expense | $ 0 | $ 39,000 |
| X | ||||||||||
- Definition Represents materials allocated to manufacturing process development. No definition available.
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| X | ||||||||||
- Definition Represents finished goods inventory allocated to research and development expense during the period. No definition available.
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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