Note 11 - Share Based Compensation and Employee Benefit Plans - Stock Option (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) $ / shares shares
Balance (in shares) | shares	4,080,944
Balance, weighted average exercise price (in dollars per share) | $ / shares	$ 22.01
Granted (in shares) | shares	498,700
Granted, weighted average exercise price (in dollars per share) | $ / shares	$ 49.47
Exercised (in shares) | shares	(768,668)
Exercised, weighted average exercise price (in dollars per share) | $ / shares	$ 18.43
Forfeited (in shares) | shares	(6,000)
Forfeited, weighted average exercise price (in dollars per share) | $ / shares	$ 37.16
Balance (in shares) | shares	3,804,976
Balance, weighted average exercise price (in dollars per share) | $ / shares	$ 26.31
Balance, weighted average remaining contractual life (Year)	6 years 3 months 18 days
Aggregate intrinsic value | $	$ 111,599,381
Expected to vest (in shares) | shares	2,549,712
Expected to vest, weighted average exercise price (in dollars per share) | $ / shares	$ 29.93
Expected to vest, weighted average remaining contractual life (Year)	7 years 6 months
Expected to vest, aggregate intrinsic value | $	$ 65,546,772
Vested and exercisable (in shares) | shares	1,228,362
Vested and exercisable, weighted average exercise price (in dollars per share) | $ / shares	$ 18.54
Vested and exercisable, weighted average remaining contractual life (Year)	3 years 9 months 18 days
Vested and exercisable, aggregate intrinsic value | $	$ 45,572,873