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Note R - Earnings Per Share (EPS) - Securities Excluded From the Diluted Per Share Calculation (Details) - shares | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Exercise Price Less Than Average Market Price Of Common Shares [Member] |  |
Antidilutive securities (in shares) | 2,124,718 | 5,282,060
Exercise Price Less Than Average Market Price Of Common Shares [Member] | Preferred Stock [Member] |  |
Antidilutive securities (in shares) | 1,426,756 | 5,264,422
Exercise Price Less Than Average Market Price Of Common Shares [Member] | Employee Stock Option [Member] |  |
Antidilutive securities (in shares) | 83 | 15,529
Exercise Price Less Than Average Market Price Of Common Shares [Member] | Warrant [Member] |  |
Antidilutive securities (in shares) | 697,879 | 2,109
Exercise Price Greater Than Average Market Price Of Common Shares [Member] |  |
Antidilutive securities (in shares) | 1,769,820 | 2,741,480
Exercise Price Greater Than Average Market Price Of Common Shares [Member] | Employee Stock Option [Member] |  |
Antidilutive securities (in shares) | 1,583,014 | 1,390,428
Exercise Price Greater Than Average Market Price Of Common Shares [Member] | Warrant [Member] |  |
Antidilutive securities (in shares) | 186,806 | 1,351,052

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://fasb.org/us-gaap/role/ref/legacyRef -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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