Note 13 - Stock-based Compensation - Schedule of Stock Option Activity (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Share-Based Payment Arrangement, Option [Member]
Options, Outstanding (in shares)	70,605
Options, outstanding, weighted average exercise price (in dollars per share)	$ 20.88
Options, outstanding, weighted average remaining life (Year)	9 years 9 months 3 days	8 years 4 months 17 days
Options, outstanding, aggregate intrinsic value	$ 0	$ 0
Options exercised (in shares)	0
Options exercised, weighted average exercise price (in dollars per share)	$ 0
Options granted (in shares)	1,627,500
Options granted, weighted average exercise price (in dollars per share)	$ 0.42
Cancelled/forfeited (in shares)	(56,921)
Cancelled/forfeited, weighted average exercise price (in dollars per share)	$ 0.65
Options, outstanding (in shares)	1,641,184	70,605
Options, outstanding, weighted average exercise price (in dollars per share)	$ 1.29	$ 20.88
Options, outstanding, vested and expected to vest (in shares)	1,641,184
Options, outstanding, vested and expected to vest, weighted average exercise price (in dollars per share)	$ 1.29
Options, outstanding, vested and expected to vest, weighted average remaining life (Year)	9 years 9 months 3 days
Options, outstanding, vested and expected to vest, aggregate intrinsic value	$ 0
Options, exercisable, vested and expected to vest (in shares)	278,288
Options, exercisable, vested and expected to vest, weighted average exercise price (in dollars per share)	$ 4.95
Options, exercisable, vested and expected to vest, weighted average remaining life (Year)	9 years 6 months 21 days
Options, exercisable, vested and expected to vest, aggregate intrinsic value	$ 0
Non-plan Options [Member]
Options, Outstanding (in shares)	25,000
Options, outstanding, weighted average exercise price (in dollars per share)	$ 5.32
Options, outstanding, weighted average remaining life (Year)	9 years 8 months 26 days	9 years 3 months 29 days
Options, outstanding, aggregate intrinsic value	$ 0	$ 0
Options exercised (in shares)	0
Options exercised, weighted average exercise price (in dollars per share)	$ 0
Options granted (in shares)	500,000
Options granted, weighted average exercise price (in dollars per share)	$ 0.53
Cancelled/forfeited (in shares)	0
Cancelled/forfeited, weighted average exercise price (in dollars per share)	$ 0
Options, outstanding (in shares)	525,000	25,000
Options, outstanding, weighted average exercise price (in dollars per share)	$ 0.76	$ 5.32
Options, outstanding, vested and expected to vest (in shares)	525,000
Options, outstanding, vested and expected to vest, weighted average exercise price (in dollars per share)	$ 0.76
Options, outstanding, vested and expected to vest, aggregate intrinsic value	$ 0
Options, exercisable, vested and expected to vest (in shares)	27,778
Options, exercisable, vested and expected to vest, weighted average exercise price (in dollars per share)	$ 0.53
Options, exercisable, vested and expected to vest, weighted average remaining life (Year)	9 years 8 months 26 days
Options, exercisable, vested and expected to vest, aggregate intrinsic value	$ 0
Options, Exercisable, weighted average remaining life (Year)	9 years 9 months 7 days