Note 13 - Basic and Diluted Net Loss Per Share - Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) - shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share (in shares)	61,750,377	23,997,339
Share-Based Payment Arrangement, Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share (in shares)	15,961,063	10,319,169
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share (in shares)	20,958,814	12,657,094
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share (in shares)	24,830,500	1,021,076