Note J - Earnings Per Share (Details Textual) - shares	1 Months Ended	3 Months Ended			6 Months Ended
	Dec. 31, 2022	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Treasury Stock, Shares, Acquired (in shares)		300,000
Share-Based Payment Arrangement, Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)		7,428		13,063	8,668	15,074
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)		45,338		0	45,906	76,925
Convertible Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)		0		1,001,614	0	1,001,614
Series A Preferred Stock [Member]
Preferred Stock, Dividend Rate, Percentage			5.00%
Treasury Stock, Shares, Acquired (in shares)	9,926