Note 5 - Warrants (Q1) (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2021

Dec. 31, 2020

Warrants [Abstract]

Outstanding Warrants

	Number of Warrants			Weighted Average Exercise Price
December 31, 2020		371,340		$	7.28
Granted		150,000			8.75
Exercised		(119,361	)		2.03
Forfeited, Canceled		(102,460	)		20.40
March 31, 2021		299,519		$	5.62

	Number of Warrants			Weighted Average Exercise Price
Outstanding at December 31, 2018		528,054		$	10.90
Forfeited, Canceled		(200,801	)		14.18
Outstanding at December 31, 2019		327,253			8.89
Granted		871,630			2.11
Exercised		(827,543	)		2.03
Outstanding at December 31, 2020		371,340		$	7.28