Note 13 - Capital Stock - Schedule of Outstanding Unvested Stock Options (Details)	3 Months Ended
	Oct. 31, 2022 $ / shares shares
Nonvested balance (in shares) | shares	2,186,154
Nonvested, Weighted Average Grant-Date Fair Value (in dollars per share) | $ / shares	$ 1.79
Issuance of Replacement Options (Note 3), number of stock options (in shares) | shares	2,301,750
Issuance of Replacement Options (Note 3), Weighted Average Exercise Price (in dollars per share) | $ / shares	$ 1.75
Granted, number of stock options (in shares) | shares	5,000
Granted, Weighted Average Grant-Date Fair Value (in dollars per share) | $ / shares	$ 2.70
Vested (in shares) | shares	(2,467,341)
Vested, Weighted Average Grant-Date Fair Value (in dollars per share) | $ / shares	$ 1.79
Nonvested balance (in shares) | shares	2,025,563
Nonvested, Weighted Average Grant-Date Fair Value (in dollars per share) | $ / shares	$ 1.74