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Note J - Earnings Per Share - Reconciliations of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Net loss	$ (6,235)	$ 5,118	$ (3,803)	$ (13,527)	$ (1,117)	$ (17,330)
Less: Preferred Stock dividends	123		124		247	246
Numerator for basic EPS: loss attributable to common stockholders	$ (6,358)		$ (3,927)		$ (1,364)	$ (17,576)
Basic (in shares)	6,453		6,272		6,386	6,270
Diluted EPS denominator (in shares)	6,453		6,272		6,386	6,270
Basic (in dollars per share)	$ (0.99)		$ (0.63)		$ (0.21)	$ (2.80)
Diluted (in dollars per share)	$ (0.99)		$ (0.63)		$ (0.21)	$ (2.80)

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