Note J - Income Taxes (Details) - Unrecognized Tax Benefit Reconciliation (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Unrecognized Tax Benefit Reconciliation [Abstract]
Unrecognized tax benefits	$ 702	$ 1,091	$ 1,061	$ 944
Increase attributable to tax positions taken during the current period			117
Increase attributable to tax positions taken during a prior period	43	78
Decrease attributable to lapse of statute of limitations	(424)	(48)
Decrease attributable to settlements	$ (8)