Note J - Earnings Per Share - Reconciliations of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net (loss) income	$ (1,758)	$ 5,118
Less: Preferred Stock dividends	122	123
Less: Earnings attributable to participating securities		683
(Loss) income attributable to common stockholders	$ (1,880)	$ 4,312
Basic (in shares)	6,651	6,320
Diluted (in shares)	6,651	6,481
Basic (in dollars per share)	$ (0.28)	$ 0.68
Diluted (in dollars per share)	$ (0.28)	$ 0.67