Note 8 - Stock-based Compensation - Summary of Restricted Common Stock Activity (Details) - $ / shares		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023
Restricted Stock [Member]
Outstanding, Shares (in shares)	[1]	1,467,936	997,745
Outstanding, Weighted average grant date fair value (in dollars per share)	[1]	$ 12.17	$ 20.62
Granted, Shares (in shares)	[1]	1,785,958	1,007,919
Granted, Weighted average grant date fair value (in dollars per share)	[1]	$ 7.47	$ 8.15
Vested, Shares (in shares)		(480,412)	(461,953)
Vested, Weighted average grant date fair value (in dollars per share)		$ 11.23	$ 20.27
Forfeited, Shares (in shares)		(130,000)	0
Forfeited (in dollars per share)		$ 8.1	$ 0
Outstanding, Shares (in shares)	[1]	2,643,482	1,543,711
Outstanding, Weighted average grant date fair value (in dollars per share)	[1]	$ 9.36	$ 12.58
Restricted Stock [Member] | Common Class A [Member]
Outstanding, Shares (in shares)	[1]	1,148,233	677,238
Outstanding, Weighted average grant date fair value (in dollars per share)	[1]	$ 12.37	$ 19.36
Granted, Shares (in shares)	[1]	823,393	738,854
Granted, Weighted average grant date fair value (in dollars per share)	[1]	$ 8.25	$ 8.34
Vested, Shares (in shares)		(318,733)	(203,986)
Vested, Weighted average grant date fair value (in dollars per share)		$ 13.17	$ 18.76
Outstanding, Shares (in shares)	[1]	1,652,893	1,212,106
Outstanding, Weighted average grant date fair value (in dollars per share)	[1]	$ 10.16	$ 12.74
Restricted Stock Units (RSUs) [Member]
Outstanding, Shares (in shares)		587,168	274,145
Outstanding, Weighted average grant date fair value (in dollars per share)		$ 11.5	$ 23.6
Granted, Shares (in shares)		1,229,390	587,168
Granted, Weighted average grant date fair value (in dollars per share)		$ 5.72	$ 11.5
Vested, Shares (in shares)		(564,793)	(247,953)
Vested, Weighted average grant date fair value (in dollars per share)		$ 11.5	$ 23.64
Forfeited, Shares (in shares)		(22,375)	(26,192)
Forfeited (in dollars per share)		$ 11.5	$ 23.15
Outstanding, Shares (in shares)		1,229,390	587,168
Outstanding, Weighted average grant date fair value (in dollars per share)		$ 5.72	$ 11.5

[1] For awards subject to future performance conditions, amounts assume target performance.