Note C - Marketable Equity Securities (Details) - Approximate Gross Unrealized Losses and Fair Value of Securities in a Loss Position (Equity Securities [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Equity Securities [Member]
Note C - Marketable Equity Securities (Details) - Approximate Gross Unrealized Losses and Fair Value of Securities in a Loss Position [Line Items]
Equity securities – Available-for-sale	$ 5,280	$ 3,961
Equity securities – Available-for-sale	554	390
Totals	5,280	3,961
Totals	$ 554	$ 390