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Note C - Marketable Equity Securities (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Jun. 30, 2013
Note C - Marketable Equity Securities (Details) [Line Items]
Asset Impairment Charges	$ 2,000	$ 20,000	$ 29,000	$ 63,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	5,581,000		5,581,000		4,235,000	5,260,000
Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss), Net of Tax			1,330,000		459,000
Trading Securities, Realized Loss			9,000	28,000
Borrowings Under Margin Account [Member]
Note C - Marketable Equity Securities (Details) [Line Items]
Trading Securities Pledged as Collateral	$ 10,188,000		$ 10,188,000		$ 10,711,000

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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The change in unrealized holding gain (loss), net of tax, on available-for-sale securities included in a separate component of shareholders' equity during the period.

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The fair value of trading securities that serve as collateral for borrowings.

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This item represents the loss realized during the period from the sale of trading securities.

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