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Note 3 - Supplemental Cash Flow Information (Tables) | 9 Months Ended
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Sep. 30, 2021
Notes Tables |
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] |
|  | Nine Months Ended |
|  | September 30, |
|  | 2021 |  |  | 2020 |
|  | (in thousands) |
Cash paid for: |  |  |  |  |  |  |  |
Interest |  | $ | 39 |  |  | $ | 55 |
Income taxes, net of refunds |  |  | 4,274 |  |  |  | 1,454 |
Non-cash investing and financing activities: |  |  |  |  |  |  |  |
Capital additions accrued but not yet paid |  | $ | 225 |  |  | $ | 225 |

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