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Note 6 - Stock-based Compensation | 9 Months Ended
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Sep. 30, 2016
Notes to Financial Statements |
Disclosure of Compensation Related Costs, Share-based Payments [Text Block] | 6. Share-based Compensation We recognize compensation expense for share-based payment awards made to our employees and directors, including stock options and restricted shares awarded under our 2007 Long-Term Incentive Plan, as amended (the “2007 Incentive Plan”) and our Directors’ Restricted Stock Plan. Currently, there are no outstanding share awards under our Directors’ Restricted Stock Plan. The following table provides information on our share-based compensation expense and related income tax benefit for the three and nine-month periods ended September 30, 2016 and 2015, respectively (in thousands).
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
|  | 2016 |  |  | 2015 |  |  | 2016 |  |  | 2015 |
Stock-based compensation expense, gross |  | $ | 1,271 |  |  | $ | 1,009 |  |  | $ | 3,827 |  |  | $ | 3,011 |
Income tax benefit at our statutory rate associated with share-based compensation |  |  | (496 | ) |  |  | (394 | ) |  |  | (1,493 | ) |  |  | (1,174 | )
Stock-based compensation expense, net |  | $ | 775 |  |  | $ | 615 |  |  | $ | 2,334 |  |  | $ | 1,837 |
The 2007 Long-Term Incentive Plan provides for the grant of incentive stock options, nonqualified stock options, restricted stock awards, stock appreciation rights, and performance awards to acquire shares of our Class A common stock or common stock, or other awards based on our performance, to our employees and non-employee directors. During the nine-month period ended September 30, 2016, we granted 218,452 shares of restricted common stock to certain employees, of which 72,816 shares will vest on each of January 31, 2017 and 2018; and 72,820 shares will vest on January 31, 2019. Also during the nine-month period ended September 30, 2016, we granted 166,677 shares of restricted Class A common stock to one employee, of which 55,559 shares will vest on each of January 31, 2017, 2018 and 2019. During the nine-month period ended September 30, 2016, we also granted 19,048 shares of restricted common stock to certain non-employee directors, which shares will vest on January 31, 2017. Also during the nine-month period ended September 30, 2016, we granted 51,935 shares of restricted Class A common stock to certain non-employee directors, which shares will vest on January 31, 2017. During the nine-month period ended September 30, 2015, we granted 150,308 shares of restricted common stock to certain employees, of which 50,102 shares vested on January 31, 2016; 50,100 shares will vest on January 31, 2017; and 50,106 shares will vest on January 31,2018. Also during the nine-month period ended September 30, 2015, we granted 229,322 shares of restricted Class A common stock to certain employees, of which 76,442 shares vested January 31, 2016; 76,442 shares will vest on January 31, 2017; and 76,438 shares will vest on January 31, 2018. Also during the nine-month period ended September 30, 2015, we granted 58,191 shares of restricted Class A common stock to certain non-employee directors, all of which vested on January 31, 2016. A summary of restricted common stock activity for the nine-month periods ended September 30, 2016 and 2015 is as follows:
|  | Nine Months Ended |
|  | September 30, 2016 |  |  | September 30, 2015 |
|  |  |  |  |  | Weighted- |  |  |  |  |  |  | Weighted- |
|  |  |  |  |  | average |  |  |  |  |  |  | average |
|  |  |  |  |  | Grant Date |  |  |  |  |  |  | Grant Date |
|  | Number of |  |  | Fair Value |  |  | Number of |  |  | Fair Value |
|  | Shares |  |  | Per Share |  |  | Shares |  |  | Per Share |
Restricted stock - common: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding - beginning of period |  |  | 337,506 |  |  | $ | 9.57 |  |  |  | 385,056 |  |  | $ | 9.09 |
Granted |  |  | 237,500 |  |  | $ | 12.88 |  |  |  | 150,308 |  |  | $ | 10.27 |
Vested |  |  | (178,973 | ) |  | $ | 8.46 |  |  |  | (197,858 | ) |  | $ | 9.16 |
Outstanding - end of period |  |  | 396,033 |  |  | $ | 12.06 |  |  |  | 337,506 |  |  | $ | 9.57 |
A summary of restricted Class A common stock activity for the nine-month periods ended September 30, 2016 and 2015 is as follows:
|  | Nine Months Ended |
|  | September 30, 2016 |  |  | September 30, 2015 |
|  |  |  |  |  | Weighted-average |  |  |  |  |  |  | Weighted-average |
|  |  |  |  |  | Grant Date |  |  |  |  |  |  | Grant Date |
|  | Number of |  |  | Fair Value |  |  | Number of |  |  | Fair Value |
|  | Shares |  |  | Per Share |  |  | Shares |  |  | Per Share |
Restricted stock - class A common: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding - beginning of period |  |  | 374,693 |  |  | $ | 9.46 |  |  |  | 204,473 |  |  | $ | 9.81 |
Granted |  |  | 218,612 |  |  | $ | 11.25 |  |  |  | 287,513 |  |  | $ | 9.37 |
Vested |  |  | (178,223 | ) |  | $ | 10.04 |  |  |  | (117,293 | ) |  | $ | 9.85 |
Outstanding - end of period |  |  | 415,082 |  |  | $ | 10.15 |  |  |  | 374,693 |  |  | $ | 9.46 |
Stock Options As of September 30, 2016 and 2015, options to purchase 274,746 shares of our common stock, with an exercise price of $1.99, were outstanding and exercisable. For each of the nine-month periods ended September 30, 2016 and 2015, we did not have any outstanding stock options for our Class A common stock. The aggregate intrinsic value of our outstanding stock options was $2.3 million based on the closing market price of our common stock on September 30, 2016.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=65895303&loc=d3e17540-113929 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68057994&loc=d3e25284-112666 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 + Details
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