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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	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Net loss	$ (1,694)	$ (26,264)
Less: Preferred stock dividends	496	496
Loss attributable to common stockholders	$ (2,190)	$ (26,760)
Basic (in shares)	6,469	6,284
Basic (in dollars per share)	$ (0.34)	$ (4.26)
Diluted (in dollars per share)	$ (0.34)	$ (4.26)

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