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Note 19 - Quarterly Results of Operations (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Quarterly Financial Information [Table Text Block] |
|  | 201 7 |
|  | Three Months Ended |
|  | March 31 |  |  | June 30 |  |  | September 30 |  |  | December 31 |
|  | (in thousands, except per share data) |
Operating revenues |  | $ | 109,405 |  |  | $ | 108,646 |  |  | $ | 108,899 |  |  | $ | 110,888 |
Operating expenses and costs |  |  | 106,743 |  |  |  | 105,748 |  |  |  | 105,131 |  |  |  | 107,536 |
Operating income |  |  | 2,662 |  |  |  | 2,898 |  |  |  | 3,768 |  |  |  | 3,352 |
Non-operating (loss) income |  |  | 2,052 |  |  |  | 650 |  |  |  | 2,767 |  |  |  | 384 |
Interest expense |  |  | (977 | ) |  |  | (935 | ) |  |  | (920 | ) |  |  | (1,070 | )
Income tax (benefit) expense |  |  | (1,454 | ) |  |  | (1,004 | ) |  |  | (2,169 | ) |  |  | 28,895 |
Net income |  | $ | 2,283 |  |  | $ | 1,609 |  |  | $ | 3,446 |  |  | $ | 31,561 |
Net income per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.36 |  |  | $ | 0.25 |  |  | $ | 0.54 |  |  | $ | 5.07 |
Diluted |  | $ | 0.36 |  |  | $ | 0.25 |  |  | $ | 0.54 |  |  | $ | 5.00 |
Average common shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 6,399 |  |  |  | 6,381 |  |  |  | 6,326 |  |  |  | 6,219 |
Diluted |  |  | 6,425 |  |  |  | 6,430 |  |  |  | 6,373 |  |  |  | 6,312 |
|  | 201 6 |
|  | Three Months Ended |
|  | March 31 |  |  | June 30 |  |  | September 30 |  |  | December 31 |
|  | (in thousands, except per share data) |
Operating revenues |  | $ | 103,589 |  |  | $ | 111,516 |  |  | $ | 109,393 |  |  | $ | 108,354 |
Operating expenses and costs |  |  | 98,003 |  |  |  | 104,162 |  |  |  | 104,098 |  |  |  | 106,661 |
Operating income |  |  | 5,586 |  |  |  | 7,354 |  |  |  | 5,295 |  |  |  | 1,693 |
Non-operating income (loss) |  |  | (22 | ) |  |  | (10 | ) |  |  | 1,235 |  |  |  | 282 |
Interest expense |  |  | (822 | ) |  |  | (910 | ) |  |  | (927 | ) |  |  | (982 | )
Income tax expense |  |  | (1,807 | ) |  |  | (2,442 | ) |  |  | (2,152 | ) |  |  | (270 | )
Net income |  | $ | 2,935 |  |  | $ | 3,992 |  |  | $ | 3,451 |  |  | $ | 723 |
Net income per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.41 |  |  | $ | 0.61 |  |  | $ | 0.54 |  |  | $ | 0.11 |
Diluted |  | $ | 0.41 |  |  | $ | 0.61 |  |  | $ | 0.53 |  |  | $ | 0.11 |
Average common shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 7,121 |  |  |  | 6,551 |  |  |  | 6,439 |  |  |  | 6,400 |
Diluted |  |  | 7,145 |  |  |  | 6,572 |  |  |  | 6,458 |  |  |  | 6,425 |

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