Note 11 - Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Share-based Payment Arrangement, Option, Activity [Table Text Block]

	Number of options			Weighted average exercise price
Outstanding December 31, 2018		3,575,000		$	0.45
Granted		-			-
Exercised		-			-
Cancelled		(374,250	)		(0.41	)
Outstanding December 31, 2019		3,200,750		$	0.45
Granted		2,745,000			0.33
Exercised		-			-
Cancelled		(70,000	)		(0.42	)
Outstanding December 31, 2019		5,875,750		$	0.39

Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block]

Range of exercise prices per option	Number outstanding		Number exercisable		Expiry date
$0.33		2,745,000		78,000	June 30, 2025
0.40		620,000		620,000	December 20, 2021
0.42		522,750		475,250	November 8, 2022
0.42		713,000		713,000	June 4, 2023
0.50		1,275,000		1,275,000	June 4, 2023
		5,875,750		3,161,250