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Note 11 - Share Based Compensation and Employee Benefit Plans - Non-vested Options (Details) - $ / shares | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Non-vested balance (in shares) | 1,796,356 |  |
Non-vested, weighted average grant date fair value (in dollars per share) | $ 11.74 |  |
Granted (in shares) | 482,663 |  |
Weighted-average fair value of stock options granted (in dollars per share) | $ 12.56 | $ 15.46 | $ 12.33
Vested (in shares) | (447,531) |  |
Vested, weighted average grant date fair value (in dollars per share) | $ 11.12 |  |
Forfeited (in shares) | (23,333) |  |
Forfeited, weighted average grant date fair value (in dollars per share) | $ 11.92 |  |
Non-vested balance (in shares) | 1,808,155 | 1,796,356 |
Non-vested, weighted average grant date fair value (in dollars per share) | $ 12.11 | $ 11.74 |

X
- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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X
- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Number of non-vested options outstanding. + References No definition available. + Details
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- Definition Number of non-vested options forfeited. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of non-vested options forfeited. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of non-vested options outstanding. + References No definition available. + Details
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