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Note 14 - Earnings (Loss) Per Share - Common Stock ("EPS") - Securities Excluded From the Diluted Per Share Calculation (Details) - shares | 3 Months Ended | 6 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Exercise Price Greater Than Average Market Price Of Common Shares [Member] |  |  |  |
Antidilutive securities (in shares) | 7,254,943 | 5,332,325 | 7,254,943 | 5,565,159
Exercise Price Greater Than Average Market Price Of Common Shares [Member] | Share-based Payment Arrangement, Option [Member] |  |  |  |
Antidilutive securities (in shares) | 1,603,054 | 1,551,349 | 1,603,054 | 1,784,183
Exercise Price Greater Than Average Market Price Of Common Shares [Member] | Warrant [Member] |  |  |  |
Antidilutive securities (in shares) | 5,651,889 | 3,780,976 | 5,651,889 | 3,780,976
Exercise Price Less Than Average Market Price Of Common Shares [Member] |  |  |  |
Antidilutive securities (in shares) | 3,919,288 | 373,023 | 3,887,731 | 278,243
Exercise Price Less Than Average Market Price Of Common Shares [Member] | Share-based Payment Arrangement, Option [Member] |  |  |  |
Antidilutive securities (in shares) | 1,326 | 4,071 | 748 |
Exercise Price Less Than Average Market Price Of Common Shares [Member] | Warrant [Member] |  |  |  |
Antidilutive securities (in shares) | 80,797 |  | 49,818 |
Exercise Price Less Than Average Market Price Of Common Shares [Member] | Convertible Debt Securities [Member] |  |  |  |
Antidilutive securities (in shares) | 3,837,165 | 368,952 | 3,837,165 | 278,243

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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=6371337&loc=d3e3550-109257 + Details
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