Note 12 - Capital Stock - Schedule of Outstanding Unvested Stock Options (Details) - $ / shares		3 Months Ended
	Aug. 07, 2019	Oct. 31, 2019
Nonvested balance (in shares)		3,310,600
Nonvested, Weighted Average Grant-Date Fair Value (in dollars per share)		$ 0.59
Granted, number of stock options (in shares)	597,650	597,650
Granted, Weighted Average Grant-Date Fair Value (in dollars per share)		$ 0.51
Vested (in shares)		(645,550)
Vested, Weighted Average Grant-Date Fair Value (in dollars per share)		$ 0.61
Nonvested balance (in shares)		3,262,700
Nonvested balance, Weighted Average Grant-Date Fair Value (in dollars per share)		$ 0.57