Note L - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Treasury Stock, Shares, Acquired			623,000
Treasury Stock Acquired, Average Cost Per Share			$ 9.76
Treasury Stock, Value, Acquired, Cost Method	$ 2,405	$ 4,912	$ 6,081	$ 11,260
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased	750,000		750,000
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures			1,059,000