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

12 Months Ended

Dec. 31, 2022

Notes Tables

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

	Number of Shares		Weighted Average Exercise Price
Outstanding, January 1, 2021		60,000	$	6.93
Granted		120,000		5.43
Exercised		-		-
Forfeited or expired		-		-
Outstanding, December 31, 2021		180,000	$	5.93
Granted		-		-
Exercised		-		-
Forfeited or expired		-		-
Outstanding, December 31, 2022		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