Stock-based compensation (Tables)

9 Months Ended

Sep. 30, 2022

Stock-based compensation

Share-based Payment Arrangement, Option, Activity

	Number of	Weighted Avg
	Options	Exercise Price
Balance at December 31, 2021	50,717,724	$	0.4466
Stock options granted	28,075,000		0.3082
Stock options forfeited	2,687,500		0.5351
Vested stock options expired	9,110,000		0.2404
Balance at September 30, 2022	66,995,224	$	0.4135
Vested at September 30, 2022	15,875,099	$	0.3537

Summary of issued and outstanding stock options

				Number of	Weighted Avg
		Number of Options	Number of	Unvested	Remaining Life
		Issued	Vested Options	Options	Outstanding
Grant Date	Exercise Price	and Outstanding	Outstanding	Outstanding	(Years)
March 14, 2020	0.19	75,000	75,000	—	0.01
March 14, 2020	0.19	37,500	37,500	—	0.21
March 14, 2020	0.19	1,133,557	837,182	296,375	2.45
July 9, 2020	0.18	175,000	131,250	43,750	2.78
August 25, 2020	0.13	20,000	10,000	10,000	2.90
October 1, 2020	0.11	266,667	116,667	150,000	3.01
October 20, 2020	0.09	20,000	10,000	10,000	3.06
December 31, 2020	0.23	125,000	125,000	—	0.01
December 31, 2020	0.23	50,000	50,000	—	0.21
December 31, 2020	0.23	15,742,500	8,632,500	7,110,000	8.25
February 26, 2021	1.87	100,000	100,000	—	0.22
February 26, 2021	1.87	200,000	100,000	100,000	8.41
March 1, 2021	2.06	200,000	100,000	100,000	8.42
March 8, 2021	1.88	200,000	100,000	100,000	8.44
March 15, 2021	2.49	200,000	100,000	100,000	8.46
May 12, 2021	0.78	3,400,000	850,000	2,550,000	8.62
May 14, 2021	0.75	3,200,000	850,000	2,350,000	8.62
August 11, 2021	0.57	50,000	50,000	—	0.15
August 11, 2021	0.57	900,000	225,000	675,000	8.87
August 18, 2021	0.50	200,000	50,000	150,000	8.89
August 23, 2021	0.50	100,000	25,000	75,000	8.90
September 13, 2021	0.57	800,000	200,000	600,000	8.96
October 1, 2021	0.58	12,650,000	—	12,650,000	9.01
January 3, 2022	0.36	100,000	—	100,000	9.27
January 4, 2022	0.35	200,000	—	200,000	9.27
January 14, 2022	0.35	200,000	—	200,000	9.30
January 16, 2022	0.35	200,000	—	200,000	9.30
January 18, 2022	0.35	100,000	—	100,000	9.31
February 14, 2022	0.30	200,000	—	200,000	9.38
February 21, 2022	0.37	200,000	—	200,000	9.40
February 25, 2022	0.35	12,300,000	—	12,300,000	9.41
March 30, 2022	0.35	200,000	—	200,000	9.50
April 1, 2022	0.34	200,000	—	200,000	9.51
April 6, 2022	0.32	100,000	—	100,000	9.52
April 11, 2022	0.31	75,000	—	75,000	9.54
May 2, 2022	0.25	300,000	—	300,000	9.59
May 9, 2022	0.21	700,000	—	700,000	9.61
May 11, 2022	0.20	400,000	—	400,000	9.62
May 16, 2022	0.23	100,000	—	100,000	9.63
May 31, 2022	0.24	500,000	—	500,000	9.67
June 1, 2022	0.25	500,000	—	500,000	9.68
June 6, 2022	0.26	200,000	—	200,000	9.69
June 13, 2022	0.24	200,000	—	200,000	9.71
June 17, 2022	0.24	375,000	375,000	—	2.45
June 17, 2022	0.24	225,000	225,000	—	3.00
June 17, 2022	0.24	2,500,000	2,500,000	—	8.26
July 1, 2022	0.21	350,000	—	350,000	9.76
July 5, 2022	0.22	200,000	—	200,000	9.77
July 6, 2022	0.26	100,000	—	100,000	9.77
July 25, 2022	0.25	200,000	—	200,000	9.82
August 1, 2022	0.28	100,000	—	100,000	9.84
August 5, 2022	0.34	2,850,000	—	2,850,000	9.85
August 8, 2022	0.39	100,000	—	100,000	9.86
August 17, 2022	0.31	200,000	—	200,000	9.89
August 19, 2022	0.27	400,000	—	400,000	9.89

August 22, 2022	0.27	400,000	—	400,000	9.90
August 29, 2022	0.27	400,000	—	400,000	9.92
August 31, 2022	0.25	800,000	—	800,000	9.93
September 6, 2022	0.21	75,000	—	75,000	9.94
September 21, 2022	0.23	200,000	—	200,000	9.98
September 23, 2022	0.21	400,000	—	400,000	9.99
September 26, 2022	0.22	300,000	—	300,000	10.00
Balance at September 30, 2022		66,995,224	15,875,099	51,120,125

Summary of option fair value assumptions

Grant Date	Volatility		Risk-Free Interest Rate		Expected Life (In Years)	Dividend Yield			Common Share Price		Strike Price	Forfeiture Rate
February 26, 2021	117	%	0.95	%	10	0	%	$	1.87	$	1.87	0	%
March 1, 2021	117		0.92		10	0			2.06		2.06	0
March 8, 2021	117		1.07		10	0			1.88		1.88	0
May 12, 2021	118		1.11		6.21-6.22	0			0.78		0.78	0
August 11, 2021	116		0.96		6.18-6.25	0			0.56		0.57	0
August 23, 2021	116		0.92		6.25	0			0.50		0.50	0
September 27, 2021	116		1.14		6.25	0			0.54		0.54	0
October 1, 2021	116		1.10		6.25	0			0.57		0.58	0
January 3, 2022	114		1.50		6.25	0			0.36		0.36	0
January 4, 2022	114		1.47		6.25	0			0.35		0.35	0
January 14, 2022	114		1.64		6.25	0			0.35		0.35	0
January 16, 2022	114		1.73		6.25	0			0.35		0.35	0
January 18, 2022	114		1.74		6.25	0			0.35		0.35	0
February 14, 2022	113		1.94		6.25	0			0.29		0.30	0
February 21, 2022	113		1.89		6.25	0			0.37		0.37	0
February 25, 2022	113		1.91		6.25	0			0.35		0.35	0
March 30, 2022	114		2.43		6.25	0			0.35		0.35	0
April 1, 2022	114		2.53		6.25	0			0.33		0.34	0
April 6, 2022	114		2.70		6.25	0			0.32		0.32	0
April 7, 2022	114		2.72		6.25	0			0.31		0.31	0
April 11, 2022	114		2.82		6.25	0			0.30		0.31	0
May 2, 2022	113		3.03		6.25	0			0.25		0.25	0
May 9, 2022	113		3.00		6.25	0			0.21		0.21	0
May 11, 2022	113		2.92		6.25	0			0.20		0.20	0
May 16, 2022	113		2.86		6.25	0			0.22		0.23	0
May 31, 2022	113		2.84		6.25	0			0.23		0.24	0
June 1, 2022	113		2.96		6.25	0			0.25		0.25	0
June 6, 2022	113		3.05		6.25	0			0.26		0.26	0
June 13, 2022	112		3.55		6.25	0			0.24		0.24	0
June 17, 2022	112		3.02		1.37	0			0.24		0.24	0
June 17, 2022	112		3.02		1.64	0			0.24		0.24	0
June 17, 2022	112		3.35		4.27	0			0.24		0.24	0
July 1, 2022	112		2.90		6.25	0			0.21		0.21	0
July 1, 2022	112		2.90		6.25	0			0.21		0.21	0
July 1, 2022	112		2.90		6.25	0			0.21		0.21	0
July 5, 2022	112		2.85		6.25	0			0.22		0.22	0
July 6, 2022	112		2.98		6.25	0			0.25		0.26	0
July 25, 2022	112		2.94		6.25	0			0.25		0.25	0
August 1, 2022	112		2.65		6.25	0			0.28		0.28	0
August 1, 2022	112		2.65		6.25	0			0.28		0.28	0
August 5, 2022	112		2.94		6.25	0			0.34		0.34	0
August 5, 2022	112		2.94		6.25	0			0.34		0.34	0
August 5, 2022	112		2.94		6.25	0			0.34		0.34	0
August 5, 2022	112		2.94		6.25	0			0.34		0.34	0
August 8, 2022	112		2.88		6.25	0			0.38		0.39	0
August 17, 2022	112		3.02		6.25	0			0.30		0.31	0

August 19, 2022	113	3.09	6.25	0	0.27	0.27	0
August 19, 2022	113	3.09	6.25	0	0.27	0.27	0
August 22, 2022	113	3.15	6.25	0	0.27	0.27	0
August 22, 2022	113	3.15	6.25	0	0.27	0.27	0
August 29, 2022	113	3.24	6.25	0	0.26	0.27	0
August 29, 2022	113	3.24	6.25	0	0.26	0.27	0
August 31, 2022	113	3.28	6.25	0	0.24	0.25	0
September 6, 2022	113	3.42	6.25	0	0.21	0.21	0
September 21, 2022	113	3.70	6.25	0	0.23	0.23	0
September 23, 2022	113	3.91	6.25	0	0.21	0.21	0
September 23, 2022	113	3.91	6.25	0	0.21	0.21	0
September 26, 2022	113	4.11	6.25	0	0.22	0.22	0
September 26, 2022	113	4.11	6.25	0	0.22	0.22	0