Note 7 - Stock-based Compensation - Summary of Restricted Common Stock Activity (Details) - $ / shares		3 Months Ended
		Mar. 31, 2026	Mar. 31, 2025
Restricted Stock [Member]
Outstanding, Shares (in shares)		3,090,376	2,567,707
Outstanding, Weighted average grant date fair value (in dollars per share)		$ 6.09	$ 9.03
Granted, Shares (in shares)		1,262,667	1,105,758
Granted, Weighted average grant date fair value (in dollars per share)		$ 4.71	$ 4.09
Vested, Shares (in shares)		(1,250,717)	(541,424)
Vested, Weighted average grant date fair value (in dollars per share)		$ 6.7	$ 12.14
Outstanding, Shares (in shares)		3,102,326	3,132,041
Outstanding, Weighted average grant date fair value (in dollars per share)		$ 5.28	$ 6.75
Restricted Stock [Member] | Common Class A [Member]
Outstanding, Shares (in shares)		2,064,540	1,589,020
Outstanding, Weighted average grant date fair value (in dollars per share)		$ 7.66	$ 9.78
Granted, Shares (in shares)	[1]	779,527	961,422
Granted, Weighted average grant date fair value (in dollars per share)	[1]	$ 11.93	$ 6.97
Vested, Shares (in shares)		(887,466)	(422,028)
Vested, Weighted average grant date fair value (in dollars per share)		$ 8.34	$ 12.26
Outstanding, Shares (in shares)		1,956,601	2,128,414
Outstanding, Weighted average grant date fair value (in dollars per share)		$ 9.06	$ 8.02
Restricted Stock Units (RSUs) [Member]
Outstanding, Shares (in shares)		0	1,229,390
Outstanding, Weighted average grant date fair value (in dollars per share)		$ 0	$ 5.72
Granted, Shares (in shares)		0	0
Granted, Weighted average grant date fair value (in dollars per share)		$ 0	$ 0
Vested, Shares (in shares)		0	(1,163,515)
Vested, Weighted average grant date fair value (in dollars per share)		$ 0	$ 5.72
Forfeited, Shares (in shares)		0	(65,875)
Forfeited, Weighted average grant date fair value (in dollars per share)		$ 0	$ 5.72
Outstanding, Shares (in shares)		0	0
Outstanding, Weighted average grant date fair value (in dollars per share)		$ 0	$ 0

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