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Note 13 - Income (Loss) Per Common Share (Tables) | 12 Months Ended
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Dec. 31, 2016
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Year ended December 31, |
|  | 2016 |  |  | 2015 |  |  | 2014 |
Numerator |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  | $ | 69,547 |  |  | $ | (86,968 | ) |  | $ | 17,824 |
Preferred stock dividends |  |  | (552 | ) |  |  | (552 | ) |  |  | (552 | )
Net income (loss) applicable to common shares |  | $ | 68,995 |  |  | $ | (87,520 | ) |  | $ | 17,272 |
Denominator |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted average common shares |  |  | 386,416 |  |  |  | 373,954 |  |  |  | 353,442 |
Dilutive stock options, restricted stock units, and warrants |  |  | 2,906 |  |  |  | — |  |  |  | 3,993 |
Diluted weighted average common shares |  |  | 389,322 |  |  |  | 373,954 |  |  |  | 357,435 |
Basic earnings (loss) per common share |  | $ | 0.18 |  |  | $ | (0.23 | ) |  | $ | 0.05 |
Diluted earnings (loss) per common share |  | $ | 0.18 |  |  | $ | (0.23 | ) |  | $ | 0.05 |

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