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Note 12 - Fair Value of Financial Instruments (Tables) | 6 Months Ended
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Jun. 30, 2020
Notes Tables |
Fair Value, by Balance Sheet Grouping [Table Text Block] |
|  | June 30, 2020 |  |  | December 31, 2019 |
(in thousands) |  | Carrying Amount |  |  | Fair Value |  |  | Carrying Amount |  |  | Fair Value |
Cash and Cash Equivalents |  | $ | 39,512 |  |  | $ | 39,512 |  |  | $ | 21,199 |  |  | $ | 21,199 |
Short-Term Debt |  |  | (41,239 | ) |  |  | (41,239 | ) |  |  | (6,000 | ) |  |  | (6,000 | )
Long-Term Debt including Current Maturities |  |  | (724,650 | ) |  |  | (795,995 | ) |  |  | (689,764 | ) |  |  | (742,279 | )

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