Note 13 - Stock-based Compensation - Assumptions Used in the Black-Scholes Option Pricing Model (Details) - Share-Based Payment Arrangement, Option [Member] - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Expected life (Year)	6 years 3 months	6 years 3 months	6 years 3 months
Expected dividend yield	0.00%	0.00%	0.00%
Weighted average grant date fair value (in dollars per share)	$ 23.11	$ 128.14	$ 45.32
Minimum [Member]
Risk-free interest rate	1.94%	0.80%	0.50%
Expected volatility	45.95%	45.28%	42.40%
Maximum [Member]
Risk-free interest rate	3.40%	1.12%	1.47%
Expected volatility	46.03%	45.53%	43.83%