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Note 8 - Income (Loss) Per Common Share (Tables) | 12 Months Ended
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Dec. 31, 2021
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Year ended December 31, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
|  |  |  |  |  | Revised |  |  | Revised |
Numerator |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  | $ | 35,095 |  |  | $ | (9,457 | ) |  | $ | (94,909 | )
Preferred stock dividends |  |  | (552 | ) |  |  | (552 | ) |  |  | (552 | )
Net income (loss) applicable to common shares |  | $ | 34,543 |  |  | $ | (10,009 | ) |  | $ | (95,461 | )
Denominator |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted average common shares |  |  | 536,192 |  |  |  | 527,329 |  |  |  | 490,449 |
Dilutive stock options, restricted stock units, and warrants |  |  | 5,984 |  |  |  | — |  |  |  | — |
Diluted weighted average common shares |  |  | 542,176 |  |  |  | 527,329 |  |  |  | 490,449 |
Basic income (loss) per common share |  | $ | 0.06 |  |  | $ | (0.02 | ) |  | $ | (0.19 | )
Diluted income (loss) per common share |  | $ | 0.06 |  |  | $ | (0.02 | ) |  | $ | (0.19 | )

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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