Note 10 - Warrants (Tables)

3 Months Ended

Mar. 31, 2022

Notes Tables

Schedule of Outstanding Warrants [Table Text Block]

	Number of Warrants		Weighted Average Exercise Price
December 31, 2021		2,431,168	$	4.48
Granted		30,777,776		0.46
Exercised		—		—
Forfeited, Canceled		—		—
March 31, 2022		33,208,944	$	0.76