Note 12 - Stock-Based Compensation - Changes in the Number and Weighted-Average Grant-Date Fair Value (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2022 $ / shares shares
Non-Vested Stock Option Awards
Non-vested stock option awards (in shares) | shares	17,532
Options, grants in period, gross (in shares) | shares	7,603
Stock option awards vested (in shares) | shares	(5,908)
Stock option awards forfeited (in shares) | shares	(1,535)
Non-vested stock option awards (in shares) | shares	17,692
Weighted Average Grant-Date Fair Value
Weighted average grant-date fair value (in dollars per share) | $ / shares	$ 6.06
Options, grants in period, weighted average grant date fair value (in dollars per share) | $ / shares	8.03
Weighted average grant-date fair value, option awards vested (in dollars per share) | $ / shares	5.68
Weighted average grant-date fair value, option awards forfeited (in dollars per share) | $ / shares	6.24
Weighted average grant-date fair value (in dollars per share) | $ / shares	$ 7.02