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Note D - Stock Based Compensation (Details) (USD $)	3 Months Ended																3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 Diluted [Member]	Mar. 31, 2013 Diluted [Member]	Mar. 31, 2014 Basic [Member]	Mar. 31, 2013 Basic [Member]	Mar. 31, 2014 Nonqualified Options [Member] Annual Grant to Non-employee Member [Member]	Mar. 31, 2014 Nonqualified Options [Member]	Mar. 31, 2014 Restricted Stock [Member]	Mar. 31, 2013 Annual Grant to Non-employee Member [Member]	Mar. 31, 2014 Increase in Annual Grant of Options, Number of Shares [Member]	Mar. 31, 2014 Amortization, Current Year [Member]	Mar. 31, 2014 Amortization, Next Year [Member]	Mar. 31, 2014 Amortization, Year 3 [Member]	Mar. 31, 2014 Amortization Year 4 [Member]	Mar. 02, 2006 2006 Stock Option Plan [Member]	Mar. 31, 2014 2006 Stock Option Plan [Member] Minimum [Member]	Mar. 31, 2014 2006 Stock Option Plan [Member] Maximum [Member]
Note D - Stock Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)																750,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period																	5 years	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)	0						504	3,024		5,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)									$ 19.88
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value	$ 60,000	$ 179,000
Allocated Share-based Compensation Expense	86,000	228,000								179,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Grants in Period (in Shares)											60,000
Allocated Share-based Compensation Expense, Impact on Earnings Per Share (in Dollars per share)			$ (0.01)	$ (0.01)	$ (0.01)	$ (0.01)
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	321,000	700,000										91,000	116,000	86,000	28,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)		$ 5.13
Share Price (in Dollars per share)	$ 19.88
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options	$ 187,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in Shares)	19,050	0

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Unrecognized cost of unvested share-based compensation awards.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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Price of a single share of a number of saleable stocks of a company.

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