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Note 12 - Marketable Securities (Tables) | 12 Months Ended
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Dec. 31, 2012
Marketable Securities [Table Text Block] |
|  | December 31, 2012 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |
Equity securities |  | $ | 14,205 |  |  | $ | 19,223 |  |  | $ | - |  |  | $ | 33,428 |
Held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other debt securities |  |  | 3,113 |  |  |  | 284 |  |  |  | - |  |  |  | 3,397 |
Total marketable securities |  | $ | 17,318 |  |  | $ | 19,507 |  |  | $ | - |  |  | $ | 36,825 |
|  | December 31, 2011 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |
Equity securities |  | $ | 14,253 |  |  | $ | 16,210 |  |  | $ | (1 | ) |  | $ | 30,462 |
Held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other debt securities |  |  | 3,078 |  |  |  | 378 |  |  |  | (10 | ) |  |  | 3,446 |
Total marketable securities |  | $ | 17,331 |  |  | $ | 16,588 |  |  | $ | (11 | ) |  | $ | 33,908 |

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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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2,12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27161-111563 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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