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Note 10 - Earnings Per Share (EPS) (Tables) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2023 | Dec. 31, 2022
Notes Tables |  |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] |
|  | Three Months Ended March 31, |
|  | 2023 |  |  | 2022 |
Stock options |  |  | 202,996 |  |  |  | 212,461 |
Warrants |  |  | 4,872,025 |  |  |  | 4,689,387 |
Total |  |  | 5,075,021 |  |  |  | 4,901,848 |
|  | Years ended December 31, |
|  | 2022 |  |  | 2021 |
Stock options |  |  | 202,996 |  |  |  | 212,461 |
Warrants |  |  | 4,872,025 |  |  |  | 4,689,387 |
Total |  |  | 5,075,021 |  |  |  | 4,901,848 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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- References No definition available. + Details
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