Note 7 - Stock-based Compensation - Summary of Restricted Common Stock Activity (Details) - $ / shares		3 Months Ended
		Mar. 31, 2025	Mar. 31, 2024
Restricted Stock [Member]
Outstanding, Shares (in shares)	[1]	2,567,707	1,467,936
Outstanding, Weighted average grant date fair value (in dollars per share)	[1]	$ 9.03	$ 12.17
Granted, Shares (in shares)	[1]	1,105,758	1,126,296
Granted, Weighted average grant date fair value (in dollars per share)	[1]	$ 4.09	$ 8.1
Vested, Shares (in shares)		(541,424)	(307,276)
Vested, Weighted average grant date fair value (in dollars per share)		$ 12.14	$ 13.78
Forfeited, Shares (in shares)		(65,875)	(22,375)
Forfeited (in dollars per share)		$ 5.72	$ 11.5
Outstanding, Shares (in shares)	[1]	3,132,041	2,286,956
Outstanding, Weighted average grant date fair value (in dollars per share)	[1]	$ 6.75	$ 9.95
Restricted Stock [Member] | Common Class A [Member]
Outstanding, Shares (in shares)	[1]	1,589,020	1,148,233
Outstanding, Weighted average grant date fair value (in dollars per share)	[1]	$ 9.78	$ 12.37
Granted, Shares (in shares)	[1]	961,422	823,393
Granted, Weighted average grant date fair value (in dollars per share)	[1]	$ 6.97	$ 8.25
Vested, Shares (in shares)		(422,028)	(318,733)
Vested, Weighted average grant date fair value (in dollars per share)		$ 12.26	$ 13.17
Outstanding, Shares (in shares)	[1]	2,128,414	1,652,893
Outstanding, Weighted average grant date fair value (in dollars per share)	[1]	$ 8.02	$ 10.16
Restricted Stock Units (RSUs) [Member]
Outstanding, Shares (in shares)		1,229,390	587,168
Outstanding, Weighted average grant date fair value (in dollars per share)		$ 5.72	$ 11.5
Granted, Shares (in shares)		0	1,229,390
Granted, Weighted average grant date fair value (in dollars per share)		$ 0	$ 5.72
Vested, Shares (in shares)		(1,163,515)	(564,793)
Vested, Weighted average grant date fair value (in dollars per share)		$ 5.72	$ 11.5
Outstanding, Shares (in shares)		0	1,229,390
Outstanding, Weighted average grant date fair value (in dollars per share)		$ 0	$ 5.72

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