Note 12 - Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]

	Number of warrants			Weighted average exercise price
Outstanding, December 31, 2017		5,219,163		$	0.48
Granted		-			-
Exercised		(1,215,000	)		(0.50	)
Expired, unexercised		(4,004,163	)		(0.51	)
Outstanding December 31, 2019 and 2018		-		$	-

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

	Number of options			Weighted average exercise price
Outstanding, December 31, 2017		1,605,000		$	0.42
Granted		2,130,000			0.47
Exercised		-			-
Cancelled		(160,000	)		(0.42	)
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

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

Range of exercise prices per option		Number outstanding		Number exercisable		Expiry date
$	0.40		670,000		670,000	December 20, 2021
	0.42		542,750		439,850	November 8, 2022
	0.42		713,000		713,000	June 4, 2023
	0.50		1,275,000		1,275,000	June 4, 2023
			3,200,750		3,097,850