Note 6 - Stockholders' Equity and Stock-based Compensation - Summary of Time-based Option Activity (Details) - Time-based Options [Member] - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Options balances, number of shares (in shares)	6,141,906
Options balances, weighted average exercise price (in dollars per share)	$ 10.48
Options balances, weighted average remaining life (Year)	6 years 8 months 19 days	7 years 25 days
Options granted, number of shares (in shares)	2,124,643
Options granted, weighted average exercise price (in dollars per share)	$ 11.31
Options exercised, number of shares (in shares)	(150,897)
Options exercised, weighted average exercise price (in dollars per share)	$ 5.57
Options canceled, number of shares (in shares)	(605,542)
Options canceled, weighted average exercise price (in dollars per share)	$ 7.59
Options expired, number of shares (in shares)	(34,958)
Options expired, weighted average exercise price (in dollars per share)	$ 20.3
Options modified, number of shares (in shares)	600,113
Options modified, weighted average exercise price (in dollars per share)	$ 4.18
Options balances, number of shares (in shares)	8,075,265	6,141,906
Options balances, weighted average exercise price (in dollars per share)	$ 10.49	$ 10.48
Options exercisable, number of shares (in shares)	4,093,267
Options exercisable, weighted average exercise price (in dollars per share)	$ 13.27
Options exercisable, weighted average remaining life (Year)	4 years 9 months 18 days