Note J - Earnings Per Share (Details Textual) - shares shares in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Share-based Payment Arrangement, Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	43		100	49	100
Unvested Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	0		300	63	400
Convertible Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	1,000		1,000	1,000	1,000
Series A Preferred Stock [Member]
Preferred Stock, Dividend Rate, Percentage		5.00%		5.00%