Note 12 - Stock-based Compensation - RSU Activity (Details) - Restricted Stock Units (RSUs) [Member]	6 Months Ended
	Jun. 30, 2024 $ / shares shares
Beginning of period, Restricted stock units, Unvested (in shares) | shares	12,326,177
Beginning of period, Restricted stock units, Unvested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 0.81
Restricted stock units, Granted (in shares) | shares	14,953,974
Restricted stock units, Granted, weighted average grant date fair value (in dollars per share) | $ / shares	$ 0.26
Restricted stock units, Vested (in shares) | shares	(5,455,413)
Restricted stock units, Vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 0.91
Restricted stock units, Forfeited (in shares) | shares	(1,396,905)
Restricted stock units, Forfeited, weighted average grant date fair value (in dollars per share) | $ / shares	$ 0.66
End of period, Restricted stock units, Unvested (in shares) | shares	20,427,833
End of period, Restricted stock units, Unvested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 0.39