Note P - Share-based Compensation - Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Outstanding, number of shares (in shares)	287
Outstanding, weighted average exercise price (in dollars per share)	$ 10.19
Outstanding, weighted average fair value (in dollars per share)	$ 5.32	$ 5.31
Outstanding, aggregate intrinsic value	$ 573	$ 1,503
Exercised, number of shares (in shares)	(4)
Exercised, weighted average exercise price (in dollars per share)	$ 7.79
Exercised, weighted average share price on date of exercise (in dollars per share)	12.91
Exercised, weighted average fair value (in dollars per share)	$ 3.95
Exercised, aggregate intrinsic value	$ 15
Forfeited, number of shares (in shares)	(2)
Forfeited, weighted average exercise price (in dollars per share)	$ 12.20
Forfeited, weighted average fair value (in dollars per share)	$ 6.08
Forfeited, aggregate intrinsic value	$ 2
Outstanding, number of shares (in shares)	281	287
Outstanding, weighted average exercise price (in dollars per share)	$ 10.21	$ 10.19
Outstanding, weighted average remaining contractual life (Year)	3 years 10 months 13 days
Exercisable, number of shares (in shares)	281
Exercisable, weighted average exercise price (in dollars per share)	$ 10.21
Exercisable, weighted average remaining contractual life (Year)	3 years 10 months 13 days
Exercisable, aggregate intrinsic value	$ 573
Vested and expected to vest, number of shares (in shares)	281
Vested and expected to vest, weighted average exercise price (in dollars per share)	$ 10.21
Vested and expected to vest, weighted average remaining contractual life (Year)	3 years 10 months 13 days
Vested and expected to vest, aggregate intrinsic value	$ 573