Note 15 - Stockholders' Equity (Deficit) - Stock Options Outstanding and Exercisable (Details)	3 Months Ended
	Mar. 31, 2024 $ / shares shares
Options outstanding, number (in shares) | shares	1,048,074
Options outstanding, weighted average remaining contractual term (Year)	7 years 6 months 7 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 18.26
Options exercisable (in shares) | shares	448,819
Options exercisable, weighted average remaining contractual term (Year)	6 years 2 months 12 days
Options exercisable, weighted average exercise price (in dollars per share)	$ 33.24
Range One [Member]
Exercise price range, lower limit (in dollars per share)	0.7051
Exercise price range, upper limit (in dollars per share)	$ 54.6
Options outstanding, number (in shares) | shares	1,000,031
Options outstanding, weighted average remaining contractual term (Year)	7 years 8 months 23 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 13.8
Options exercisable (in shares) | shares	401,178
Options exercisable, weighted average remaining contractual term (Year)	6 years 6 months 21 days
Options exercisable, weighted average exercise price (in dollars per share)	$ 23.97
Range Two [Member]
Exercise price range, lower limit (in dollars per share)	63.9
Exercise price range, upper limit (in dollars per share)	$ 119.25
Options outstanding, number (in shares) | shares	45,774
Options outstanding, weighted average remaining contractual term (Year)	3 years 2 months 4 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 99.44
Options exercisable (in shares) | shares	45,372
Options exercisable, weighted average remaining contractual term (Year)	3 years 1 month 28 days
Options exercisable, weighted average exercise price (in dollars per share)	$ 99.46
Range Three [Member]
Exercise price range, lower limit (in dollars per share)	186.75
Exercise price range, upper limit (in dollars per share)	$ 382.5
Options outstanding, number (in shares) | shares	1,627
Options outstanding, weighted average remaining contractual term (Year)	4 years 8 months 26 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 271.15
Options exercisable (in shares) | shares	1,627
Options exercisable, weighted average remaining contractual term (Year)	4 years 8 months 26 days
Options exercisable, weighted average exercise price (in dollars per share)	$ 271.15
Range Four [Member]
Exercise price range, lower limit (in dollars per share)	405
Exercise price range, upper limit (in dollars per share)	$ 483.75
Options outstanding, number (in shares) | shares	373
Options outstanding, weighted average remaining contractual term (Year)	10 months 28 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 405.36
Options exercisable (in shares) | shares	373
Options exercisable, weighted average remaining contractual term (Year)	10 months 28 days
Options exercisable, weighted average exercise price (in dollars per share)	$ 405.36
Range Five [Member]
Exercise price range, lower limit (in dollars per share)	650.25
Exercise price range, upper limit (in dollars per share)	$ 958.5
Options outstanding, number (in shares) | shares	269
Options outstanding, weighted average remaining contractual term (Year)	4 years 2 months 12 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 727.38
Options exercisable (in shares) | shares	269
Options exercisable, weighted average remaining contractual term (Year)	4 years 2 months 12 days
Options exercisable, weighted average exercise price (in dollars per share)	$ 727.38