Note 7 - Stock Based Compensation - Summary of Stock Options (Details) shares in Thousands	9 Months Ended
	Sep. 30, 2023 $ / shares shares
Outstanding, shares (in shares) | shares	13
Outstanding, Weighted average exercise price per shar (in dollars per share)	$ 5.47
Outstanding, Weighted average grant date fair value	2,980
Granted, shares (in shares) | shares	0
Granted, Weighted average exercise price per share (in dollars per share)	$ 0
Granted, Weighted average grant date fair value (in dollars per share)	$ 0
Outstanding, shares (in shares) | shares	13
Outstanding, Weighted average exercise price per shar (in dollars per share)	$ 5.47
Outstanding, Weighted average grant date fair value	2,980