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Note 12 - Marketable Securities | 12 Months Ended
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Dec. 31, 2016
Notes to Financial Statements |
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] | 12. Marketable Securities: The amortized cost and gross unrealized gains/(losses) of securities available-for-sale and held-to-maturity at December 31, 2016 and 2015, are as follows (in thousands):
|  | December 31, 201 6 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Total |
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |
Equity securities |  | $ | 6,096 |  |  | $ | 406 |  |  | $ | 6,502 |
Held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |
Debt securities |  |  | 1,599 |  |  |  | - |  |  |  | 1,599 |
Total marketable securities |  | $ | 7,695 |  |  | $ | 406 |  |  | $ | 8,101 |
|  | December 31, 201 5 |
|  | Amortized Cost |  |  | Gross Unrealized Gains/ ( Losses ) |  |  | Total |
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |
Equity securities |  | $ | 5,511 |  |  | $ | 398 |  |  | $ | 5,909 |
Held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |
Debt securities |  |  | 1,656 |  |  |  | (1 | ) |  |  | 1,655 |
Total marketable securities |  | $ | 7,167 |  |  | $ | 397 |  |  | $ | 7,564 |
During 2015, the Company received $76.2 million in proceeds from the sale or redemption of certain marketable securities. In connection with these transactions, the Company recognized $39.9 million of realizable gains. As of December 31, 2016, the contractual maturities of debt securities classified as held-to-maturity are within the next five years. Actual maturities may differ from contractual maturities as issuers may have the right to prepay debt obligations with or without prepayment penalties.

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