Note 5 - Warrants (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

Schedule of Outstanding Warrants [Table Text Block]

	Number of Warrants			Weighted Average Exercise Price
December 31, 2019		327,253		$	8.89
Granted		—			—
Exercised		(105,000	)		3.64
Forfeited, Canceled		—			—
March 31, 2020		222,253		$	11.37