Note 6 - Stockholders' Equity and Stock-based Compensation - Summary of Time-based Option Activity (Details) - Time-based Options [Member]	9 Months Ended	12 Months Ended
	Sep. 30, 2024 $ / shares shares	Dec. 31, 2023 $ / shares shares
Options balances, number of shares (in shares) | shares	6,141,906
Options balances, weighted average exercise price (in dollars per share) | $ / shares	$ 10.48
Options balances, weighted average remaining life (Year)	7 years 2 months 4 days	7 years 25 days
Options granted, number of shares (in shares) | shares	2,123,643
Options granted, weighted average exercise price (in dollars per share) | $ / shares	$ 11.3
Options exercised, number of shares (in shares) | shares	(100,897)
Options exercised, weighted average exercise price (in dollars per share) | $ / shares	$ 4.65
Options canceled, number of shares (in shares) | shares	(6,542)
Options canceled, weighted average exercise price (in dollars per share) | $ / shares	$ 20.82
Options expired, number of shares (in shares) | shares	(34,958)
Options expired, weighted average exercise price (in dollars per share) | $ / shares	$ 20.3
Options balances, number of shares (in shares) | shares	8,123,152	6,141,906
Options balances, weighted average exercise price (in dollars per share) | $ / shares	$ 10.71	$ 10.48
Options exercisable, number of shares (in shares) | shares	3,745,410
Options exercisable, weighted average exercise price (in dollars per share) | $ / shares	$ 13.97
Options exercisable, weighted average remaining life (Year)	4 years 10 months 2 days