Note 10 - Net Loss Per Share Attributable to Common Stockholders - Summary of Antidilutive Securities (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Potentially dilutive securities excluded from denominator of the diluted earnings per share computation (in shares)	32,513,217	25,166,916	30,172,254	22,882,059
Share-Based Payment Arrangement, Option [Member]
Potentially dilutive securities excluded from denominator of the diluted earnings per share computation (in shares)	26,231,501	21,568,098	24,698,785	19,869,813
Restricted Stock Units (RSUs) [Member]
Potentially dilutive securities excluded from denominator of the diluted earnings per share computation (in shares)	5,854,854	3,090,220	5,025,022	2,600,499
Warrant [Member] | Common Stock [Member]
Potentially dilutive securities excluded from denominator of the diluted earnings per share computation (in shares)	10,914	140,596	10,914	175,928
Employee Stock Purchase Plan [Member]
Potentially dilutive securities excluded from denominator of the diluted earnings per share computation (in shares)	415,948	368,002	437,533	235,819