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Note 2 - Cash and Cash Equivalents and Short-term Investments (Detail) (USD $) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2013 | Mar. 31, 2012 | Dec. 31, 2012
Cash, FDIC Insured Amount | $ 4,000,000 |  |
Available-for-sale Equity Securities, Amortized Cost Basis | 20,500,000 |  | 48,100,000
Proceeds from Sale of Available-for-sale Securities | 28,151,000 | 11,325,000 |
Available-for-sale Securities, Gross Realized Gains | 486,000 | 460,000 |
Available-for-sale Securities, Gross Realized Losses | 4,000 | 0 |
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax |  | 580,000 |
Other Comprehensive Income (Loss), Tax | 209,000 |  |
Investment Income, Interest | 229,000 | 353,000 |
Municipal Bond Securities [Member] |  |  |
Available-for-sale Equity Securities, Amortized Cost Basis | 20,500,000 |  |
Majority Owned Joint Ventures [Member] |  |  |
Restricted Cash and Cash Equivalents | $ 542,000 |  |

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- Definition This item represents the cost of equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments for other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References No definition available. + Details
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- Definition Income derived from investments in debt securities and on cash and cash equivalents the earnings of which reflect the time value of money or transactions in which the payments are for the use or forbearance of money. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 14 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7(b)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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