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Note 11 - Marketable Securities (Tables) | 12 Months Ended
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Dec. 31, 2018
Notes Tables |
Marketable Securities [Table Text Block] |
|  | December 31, 2018 |  |  | December 31, 2017 |
Available-for-sale: |  |  |  |  |  |  |  |
Equity securities |  | $ | 9,045 |  |  | $ | 11,936 |
Held-to-maturity: |  |  |  |  |  |  |  |
Debt securities |  |  | 1,257 |  |  |  | 1,329 |
Total marketable securities |  | $ | 10,302 |  |  | $ | 13,265 |

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- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References No definition available. + Details
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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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