Note 11 - Stock-Based Compensation - Schedule of Stock Options (Details) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Outstanding, shares (in shares)	5
Outstanding, weighted average exercise price (in dollars per share)	$ 27.57
Outstanding, weighted average remaining contractual term (Year)	8 years	4 years 1 month 6 days
Granted, shares (in shares)	25
Granted, weighted average exercise price (in dollars per share)	$ 1.26
Outstanding, shares (in shares)	30	5
Outstanding, weighted average exercise price (in dollars per share)	$ 5.96	$ 27.57
Vested and expected to vest, shares (in shares)	30
Vested and expected to vest, weighted average exercise price (in dollars per share)	$ 5.96
Vested and expected to vest, weighted average remaining contractual term (Year)	8 years
Exercisable, shares (in shares)	5
Exercisable, weighted average exercise price (in dollars per share)	$ 27.68
Exercisable, weighted average remaining contractual term (Year)	2 years 10 months 24 days