Note C - Recognized Gains (Losses) in Market Value for Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Trading securities
Recognized gain at beginning of period	$ 83	$ 57	$ 146	$ 8
Recognized gain at end of period	59	89	59	89
Net recognized (loss) gain for the period	(24)	32	(87)	81
Net recognized (loss) gain for the period, net of taxes	$ (15)	$ 20	$ (54)	$ 50