Note J - Earnings Per Share (Details Textual) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Share-based Payment Arrangement, Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	32	100
Unvested Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	500	200
Convertible Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	1,000	1,000
Series A Preferred Stock [Member]
Preferred Stock, Dividend Rate, Percentage	5.00%