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Note D - Stock Based Compensation (Details) (USD $)	3 Months Ended		6 Months Ended						6 Months Ended							6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Amortization, Current Year [Member]	Jun. 30, 2014 Amortization, Next Year [Member]	Jun. 30, 2014 Amortization, Year 3 [Member]	Jun. 30, 2014 Amortization Year 4 [Member]	Jun. 30, 2014 Restricted Stock [Member]	Jun. 30, 2014 Nonqualified Options [Member] Annual Grant to Non-employee Member [Member]	Jun. 30, 2013 Annual Grant to Non-employee Member [Member]	Jun. 30, 2014 Increase in Annual Grant of Options, Number of Shares [Member]	Jun. 30, 2014 Diluted [Member]	Jun. 30, 2013 Diluted [Member]	Mar. 02, 2006 2006 Stock Option Plan [Member]	Jun. 30, 2014 Minimum [Member] 2006 Stock Option Plan [Member]	Jun. 30, 2014 Maximum [Member] 2006 Stock Option Plan [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, 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			$ 144,000	$ 180,000
Allocated Share-based Compensation Expense	30,000	49,000	115,000	276,000							180,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Grants in Period (in Shares)												60,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)										504	5,000
Allocated Share-based Compensation Expense, Impact on Earnings Per Share (in Dollars per share)													$ (0.01)	$ (0.02)
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	290,000		290,000		61,000	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-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)		0	0
Share Price (in Dollars per share)	$ 27.96		$ 27.96
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options			$ 463,000

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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 number of grants made 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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Gross number of share options (or share units) granted during the period.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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

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