Share capital (Tables)

3 Months Ended

Mar. 31, 2023

Share capital

Summary of Stock option award

			Options
			outstanding		Weighted
			Weighted		average
			average		remaining
			exercise		contractual
	Number		Price		life (in years)
Outstanding, December 31, 2022		6,080,000	$	1.76		2.92
Expired		–		–		–
Cancelled		–		–		–
Granted		100,000		0.30		6.90
Outstanding, March 31, 2023		6,180,000	$	1.74		2.74
Options exercisable		6,163,333	$	1.73		2.73

Summary of stock option-based compensation

	Three months
	ended March 31,
Employee expense	2023		2022
Stock and stock option compensation granted in
2015		-		62,267
2020		32,369		32,369
2023		37,096		-
Total stock-based compensation expense recognized	$	69,465	$	94,636

Summary of stock option-based compensation expense

	Three months
	ended March 31,
	2023		2022
Stock-based compensation pertaining to general and administrative expenses	$	37,096	$	31,133
Stock-based compensation pertaining to research and development expenses		32,369		63,503
Total	$	69,465	$	94,636