Note 9 - Equity Incentive Plans and Equity - Schedule Of Share Based Payment Award Stock Options Valuation Assumptions (Details) - Share-Based Payment Arrangement, Option [Member] - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Weighted average exercise price of options granted (in dollars per share)	$ 67.02	$ 155.00	$ 135.55
Expected volatility	52.50%	50.40%
Expected volatility			46.90%
Expected volatility			51.50%
Average expected terms in years (Year)	6 years 6 months	6 years 1 month 6 days
Risk-free interest rate	3.80%	1.10%
Expected dividend yield	0.00%	0.00%	0.00%
Minimum [Member]
Average expected terms in years (Year)			5 years 9 months 18 days
Risk-free interest rate			0.30%
Maximum [Member]
Average expected terms in years (Year)			7 years