Stock options (Details)	3 Months Ended
	Nov. 30, 2021 USD ($) $ / shares shares
Stock Options
Number of shares, Beginning balance	4,450,000
Number of options, granted	100,000
Number of shares, Ending balance	4,550,000
Number of options, Exercisable balance	1,583,333
Weighted Average exercise price, beginning | $ / shares	$ 0.77
Weighted Average exercise price, granted | $ / shares	1.125
Weighted Average exercise price, Ending balance | $ / shares	0.78
Weighted Average exercise price, exercisable balance | $ / shares	$ 0.79
Weighted average contractual term, beginning	4 years 5 months 1 day
Weighted average contractual term, granted	4 years 9 months 3 days
Weighted average contractual term, outstanding	4 years 2 months 8 days
Weighted average contractual term, exercisable	4 years 2 months 15 days
Aggregate Intrinsic value, beginning balance	1,334,000
Aggregate Intrinsic value, ending balance | $	$ 5,014,000
Aggregate Intrinsic value, exercisable balance	1,721,667