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Note 8 - Stock-based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2023
Notes Tables |
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
|  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Stock-based compensation expense, gross |  | $ | 5 |  |  | $ | 6 |  |  | $ | 14 |  |  | $ | 17 |
Income tax benefit at our statutory rate associated with share-based compensation |  |  | (1 | ) |  |  | (2 | ) |  |  | (4 | ) |  |  | (4 | )
Stock-based compensation expense, net |  | $ | 4 |  |  | $ | 4 |  |  | $ | 10 |  |  | $ | 13 |
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] |
|  | Nine Months Ended |
|  | September 30, 2023 |  |  | September 30, 2022 |
|  |  |  |  |  | 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 (1) |  |  | 997,745 |  |  | $ | 20.62 |  |  |  | 1,035,728 |  |  | $ | 19.69 |
Granted(1) |  |  | 1,007,919 |  |  | $ | 8.15 |  |  |  | 400,927 |  |  | $ | 21.68 |
Vested |  |  | (461,953 | ) |  | $ | 20.27 |  |  |  | (341,918 | ) |  | $ | 19.03 |
Outstanding - end of period (1) |  |  | 1,543,711 |  |  | $ | 12.58 |  |  |  | 1,094,737 |  |  | $ | 20.62 |
Restricted stock - Class A common: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding - beginning of period (1) |  |  | 677,238 |  |  | $ | 19.36 |  |  |  | 720,421 |  |  | $ | 18.22 |
Granted(1) |  |  | 738,854 |  |  | $ | 8.34 |  |  |  | 250,448 |  |  | $ | 20.52 |
Vested |  |  | (203,986 | ) |  | $ | 18.76 |  |  |  | (229,758 | ) |  | $ | 16.99 |
Outstanding - end of period (1) |  |  | 1,212,106 |  |  | $ | 12.74 |  |  |  | 741,111 |  |  | $ | 19.38 |
Restricted stock units - common stock: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding - beginning of period |  |  | 274,145 |  |  | $ | 23.60 |  |  |  | 125,247 |  |  | $ | 19.02 |
Granted |  |  | 587,168 |  |  | $ | 11.50 |  |  |  | 259,079 |  |  | $ | 23.87 |
Vested |  |  | (247,953 | ) |  | $ | 23.64 |  |  |  | (108,921 | ) |  | $ | 19.03 |
Forfeited |  |  | (26,192 | ) |  | $ | 23.15 |  |  |  | (1,260 | ) |  | $ | 19.05 |
Outstanding - end of period |  |  | 587,168 |  |  | $ | 11.50 |  |  |  | 274,145 |  |  | $ | 23.60 |

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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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