Note 8 - Stock-based Compensation - Summary of Restricted Common Stock Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Restricted Stock [Member]
Outstanding, Shares (in shares)	1,467,936	997,745	1,035,728
Outstanding, Weighted average grant date fair value (in dollars per share)	$ 12.17	$ 20.62	$ 19.69
Granted, Shares (in shares)	1,785,958	1,007,919	400,927
Granted, Weighted average grant date fair value (in dollars per share)	$ 7.47	$ 8.15	$ 21.68
Vested, Shares (in shares)	(556,187)	(537,728)	(438,910)
Vested, Weighted average grant date fair value (in dollars per share)	$ 12.51	$ 20.32	$ 19.38
Forfeited, Shares (in shares)	(130,000)	0	0
Forfeited, Weighted average grant date fair value (in dollars per share)	$ 8.1	$ 0	$ 0
Outstanding, Shares (in shares)	2,567,707	1,467,936	997,745
Outstanding, Weighted average grant date fair value (in dollars per share)	$ 9.03	$ 12.17	$ 20.62
Restricted Stock [Member] | Common Class A [Member]
Outstanding, Shares (in shares)	1,148,233	677,238	720,421
Outstanding, Weighted average grant date fair value (in dollars per share)	$ 12.37	$ 19.36	$ 18.22
Granted, Shares (in shares)	823,393	738,854	250,448
Granted, Weighted average grant date fair value (in dollars per share)	$ 8.25	$ 8.34	$ 20.52
Vested, Shares (in shares)	(382,606)	(267,859)	(293,631)
Vested, Weighted average grant date fair value (in dollars per share)	$ 14.24	$ 18.95	$ 17.55
Outstanding, Shares (in shares)	1,589,020	1,148,233	677,238
Outstanding, Weighted average grant date fair value (in dollars per share)	$ 9.78	$ 12.37	$ 19.36
Restricted Stock Units (RSUs) [Member]
Outstanding, Shares (in shares)	587,168	274,145	125,247
Outstanding, Weighted average grant date fair value (in dollars per share)	$ 11.5	$ 23.6	$ 19.02
Granted, Shares (in shares)	1,229,390	587,168	259,079
Granted, Weighted average grant date fair value (in dollars per share)	$ 5.72	$ 11.5	$ 23.87
Vested, Shares (in shares)	(564,793)	(247,953)	(108,921)
Vested, Weighted average grant date fair value (in dollars per share)	$ 11.5	$ 23.64	$ 19.03
Forfeited, Shares (in shares)	(22,375)	(26,192)	(1,260)
Forfeited, Weighted average grant date fair value (in dollars per share)	$ 11.5	$ 23.15	$ 19.05
Outstanding, Shares (in shares)	1,229,390	587,168	274,145
Outstanding, Weighted average grant date fair value (in dollars per share)	$ 5.72	$ 11.5	$ 23.6