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Note 5 - Income (Loss) Per Common Share (Details Textual) - $ / shares | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Common Stock, Shares Authorized (in shares) | 750,000,000 |  | 750,000,000 |  | 750,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ 0.25 |  | $ 0.25 |  | $ 0.25
Common Stock, Shares, Issued, Total (in shares) | 537,655,291 |  | 537,655,291 |  |
Treasury Stock, Shares, Ending Balance (in shares) | 6,821,044 |  | 6,821,044 |  | 6,287,271
Common Stock, Shares, Outstanding, Ending Balance (in shares) | 530,834,247 |  | 530,834,247 |  |
Earnings Per Share, Basic and Diluted, Total (in dollars per share) | $ (0.03) | $ (0.04) | $ (0.03) | $ (0.19) |
Incremental Common Shares Attributable to Share-based Payment Arrangements, Total (in shares) | 2,499,956 |  |  |  |
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants (in shares) | 1,454,246 |  |  |  |
Incremental Common Shares Attributable to Dilutive Effect of Deferred Shares (in shares) | 1,996,112 |  |  |  |

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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=121326447&loc=d3e1337-109256 + Details
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