Note 10 - Stock Options and Stock Purchase Warrants (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

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

	Number of Shares			Weighted Average Exercise Price
Outstanding, January 1, 2020		460,000		$	7.34
Granted		-			-
Exercised		-			-
Forfeited or expired		(400,000	)		(7.40	)
Outstanding, December 31, 2020		60,000		$	6.93
Granted		120,000			5.43
Exercised		-			-
Forfeited or expired		-			-
Outstanding, December 31, 2021		180,000		$	5.93

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Year ended December 31, 2021
Weighted average fair value at the measurement date ($)	3.1
Dividend yield (%)	0
Expected volatility of the share prices (%)	68.9
Risk-free interest rate (%)	1.3
Expected life of share options (years)	4.0 to 6.3
Weighted average share price ($)	5.4