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, 2020	Mar. 31, 2019
Net income (loss)	$ 5,118	$ (13,527)
Less: Preferred Stock dividends	123	122
Less: Earnings attributable to participating securities	683
Numerator for basic EPS: income (loss) attributable to common stockholders	4,312	(13,649)
Effect of dilutive securities:
Less: Earnings attributable to participating securities	683
Less: Re-allocation of earnings to participating securities considering potentially dilutive securities	(669)
Numerator for diluted EPS	$ 4,326	$ (13,649)
Basic (in shares)	6,320	6,268
Unvested shares (in shares)	161
Diluted EPS denominator (in shares)	6,481	6,268
Basic (in dollars per share)	$ 0.68	$ (2.18)
Diluted (in dollars per share)	$ 0.67	$ (2.18)