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Note 20 - Quarterly Results of Operations (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Quarterly Financial Information [Table Text Block] |
|  | 2020 |
|  | Three Months Ended |
|  | March 31 |  |  | June 30 |  |  | September 30 |  |  | December 31 |
|  | (in thousands, except per share data) |
Operating revenues |  | $ | 129,155 |  |  | $ | 92,979 |  |  | $ | 121,942 |  |  | $ | 142,750 |
Operating expenses and costs |  |  | 119,669 |  |  |  | 94,986 |  |  |  | 111,868 |  |  |  | 126,380 |
Operating income (loss) |  |  | 9,486 |  |  |  | (2,007 | ) |  |  | 10,074 |  |  |  | 16,370 |
Non-operating (loss) income |  |  | (9,076 | ) |  |  | 2,961 |  |  |  | (94 | ) |  |  | 4,510 |
Interest expense |  |  | (2,212 | ) |  |  | (2,179 | ) |  |  | (2,211 | ) |  |  | (2,214 | )
Income tax benefit (expense) |  |  | 498 |  |  |  | 402 |  |  |  | (1,769 | ) |  |  | (4,713 | )
Net (loss) income |  | $ | (1,304 | ) |  | $ | (823 | ) |  | $ | 6,000 |  |  | $ | 13,953 |
Net (loss) income per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | (0.23 | ) |  | $ | (0.14 | ) |  | $ | 1.04 |  |  | $ | 2.43 |
Diluted |  | $ | (0.23 | ) |  | $ | (0.14 | ) |  | $ | 1.04 |  |  | $ | 2.43 |
Average common shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 5,746 |  |  |  | 5,766 |  |  |  | 5,763 |  |  |  | 5,734 |
Diluted |  |  | 5,746 |  |  |  | 5,766 |  |  |  | 5,768 |  |  |  | 5,752 |
|  | 2019 |
|  | Three Months Ended |
|  | March 31 |  |  | June 30 |  |  | September 30 |  |  | December 31 |
|  | (in thousands, except per share data) |
Operating revenues |  | $ | 128,686 |  |  | $ | 133,000 |  |  | $ | 128,994 |  |  | $ | 123,497 |
Operating expenses and costs |  |  | 118,999 |  |  |  | 119,789 |  |  |  | 121,461 |  |  |  | 141,381 |
Operating income (loss) |  |  | 9,687 |  |  |  | 13,211 |  |  |  | 7,533 |  |  |  | (17,884 | )
Non-operating income (loss) |  |  | 3,472 |  |  |  | (197 | ) |  |  | 490 |  |  |  | 2,457 |
Interest expense |  |  | (2,040 | ) |  |  | (2,059 | ) |  |  | (2,178 | ) |  |  | (2,377 | )
Income tax (expense) benefit |  |  | (2,818 | ) |  |  | (2,301 | ) |  |  | (1,264 | ) |  |  | 4,168 |
Net income (loss) |  | $ | 8,301 |  |  | $ | 8,654 |  |  | $ | 4,581 |  |  | $ | (13,636 | )
Net income (loss) per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 1.40 |  |  | $ | 1.47 |  |  | $ | 0.80 |  |  | $ | (2.37 | )
Diluted |  | $ | 1.39 |  |  | $ | 1.45 |  |  | $ | 0.79 |  |  | $ | (2.37 | )
Average common shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 5,921 |  |  |  | 5,901 |  |  |  | 5,756 |  |  |  | 5,751 |
Diluted |  |  | 5,985 |  |  |  | 5,949 |  |  |  | 5,799 |  |  |  | 5,751 |

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