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Note 16 - Earnings (Loss) Per Share - Common Stock (EPS) - Securities Excluded from the Diluted Per Share Calculation (Details) - shares | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Exercise Price Less Than Average Market Price Of Common Shares [Member] |  |  |  |
Antidilutive securities (in shares) | 4,901,932 | 906,869 | 4,901,932 | 906,869
Exercise Price Greater Than Average Market Price Of Common Shares [Member] |  |  |  |
Antidilutive securities (in shares) | 0 | 41,163 | 3,598 | 374,727
Share-based Payment Arrangement, Option [Member] | Exercise Price Less Than Average Market Price Of Common Shares [Member] |  |  |  |
Antidilutive securities (in shares) | 212,545 | 200,382 | 212,545 | 200,382
Share-based Payment Arrangement, Option [Member] | Exercise Price Greater Than Average Market Price Of Common Shares [Member] |  |  |  |
Antidilutive securities (in shares) | 0 | 303 | 0 | 2,353
Warrant [Member] | Exercise Price Less Than Average Market Price Of Common Shares [Member] |  |  |  |
Antidilutive securities (in shares) | 4,689,387 | 706,487 | 4,689,387 | 706,487
Warrant [Member] | Exercise Price Greater Than Average Market Price Of Common Shares [Member] |  |  |  |
Antidilutive securities (in shares) | 0 | 39,825 | 0 | 368,240
Restricted Stock [Member] | Exercise Price Greater Than Average Market Price Of Common Shares [Member] |  |  |  |
Antidilutive securities (in shares) | 0 | 1,035 | 3,598 | 4,134

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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