Note 1 - Basis of Presentation - Performance Based Restricted Stock Activity (Details) - Performance Shares [Member] shares in Thousands	9 Months Ended
	Sep. 30, 2022 $ / shares shares
Unvested (in shares) | shares	28
Unvested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 26.80
Expired (in shares) | shares	(28)
Expired, weighted average option exercise price per share (in dollars per share) | $ / shares	$ 26.80
Unvested (in shares) | shares	0
Unvested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 0