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Note 4 - Stock-based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2016
Notes Tables |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] |
|  | Number of stock awards (in thousands) |  |  | Weighted average grant date fair value |
Unvested at December 31, 2013 |  |  | 777 |  |  | $ | 5.95 |
Granted |  |  | 136 |  |  | $ | 12.27 |
Vested |  |  | (137 | ) |  | $ | 7.43 |
Forfeited |  |  | (134 | ) |  | $ | 7.80 |
Unvested at December 31, 2014 |  |  | 642 |  |  | $ | 6.60 |
Granted |  |  | 63 |  |  | $ | 28.10 |
Vested |  |  | (246 | ) |  | $ | 4.97 |
Forfeited |  |  | (129 | ) |  | $ | 5.38 |
Unvested at December 31, 2015 |  |  | 330 |  |  | $ | 12.43 |
Granted |  |  | 120 |  |  | $ | 18.92 |
Vested |  |  | (169 | ) |  | $ | 5.28 |
Forfeited |  |  | (16 | ) |  | $ | 16.53 |
Unvested at December 31, 2016 |  |  | 265 |  |  | $ | 18.63 |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  | Number of options (in thousands) |  |  | Weighted average exercise price |  |  | Weighted average remaining contractual term (in years) |  |  | Aggregate intrinsic value (in thousands) |
Outstanding at December 31, 2013 |  |  | 221 |  |  | $ | 14.98 |  |  |  | 1.0 |  |  | $ | - |
Options granted |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Options exercised |  |  | (45 | ) |  | $ | 13.64 |  |  |  |  |  |  |  |  |
Options forfeited |  |  | (100 | ) |  | $ | 21.71 |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2014 |  |  | 76 |  |  | $ | 14.73 |  |  |  | 0.5 |  |  | $ | 945 |
Options granted |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Options exercised |  |  | (73 | ) |  | $ | 14.79 |  |  |  |  |  |  |  |  |
Options forfeited |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2015 |  |  | 3 |  |  | $ | 12.79 |  |  |  | 0.4 |  |  | $ | 15 |
Options granted |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Options exercised |  |  | (3 | ) |  | $ | 12.79 |  |  |  | - |  |  |  | - |
Options forfeited |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2016 |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Exercisable at December 31, 2016 |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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- References No definition available. + Details
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