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Note U - Earnings Per Share (EPS) - Securities Excluded From the Diluted Per Share Calculation (Details) - shares | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Exercise Price Greater Than Average Market Price Of Common Shares [Member] |  |
Antidilutive securities (in shares) | 945 | 697,962
Exercise Price Greater Than Average Market Price Of Common Shares [Member] | Share-based Payment Arrangement, Option [Member] |  |
Antidilutive securities (in shares) | 945 | 83
Exercise Price Greater Than Average Market Price Of Common Shares [Member] | Warrant [Member] |  |
Antidilutive securities (in shares) |  | 697,879
Exercise Price Less Than Average Market Price Of Common Shares [Member] |  |
Antidilutive securities (in shares) | 6,596,938 | 3,196,576
Exercise Price Less Than Average Market Price Of Common Shares [Member] | Share-based Payment Arrangement, Option [Member] |  |
Antidilutive securities (in shares) | 1,749,724 | 1,583,014
Exercise Price Less Than Average Market Price Of Common Shares [Member] | Warrant [Member] |  |
Antidilutive securities (in shares) | 3,388,474 | 186,806
Exercise Price Less Than Average Market Price Of Common Shares [Member] | Convertible Debt Securities [Member] |  |
Antidilutive securities (in shares) | 1,458,740 |
Exercise Price Less Than Average Market Price Of Common Shares [Member] | Preferred Stock 1 [Member] |  |
Antidilutive securities (in shares) |  | 1,426,756

X
- 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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