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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

X

- Definition

Accumulated appreciation or loss, net of tax, in value of the total of available-for-sale securities at the end of an accounting period.

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- Definition

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+ References

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+ References

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-Name Statement of Financial Accounting Standard (FAS)

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

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