Note 11 - Stock-based Compensation - Schedule of Outstanding Unvested Stock Options (Details)	6 Months Ended
	Jan. 31, 2026 $ / shares shares
Balance, Non-vested, number of shares (in shares) | shares	359,619
Nonvested, Weighted Average Grant-Date Fair Value (in dollars per share) | $ / shares	$ 3.8
Vested, Non-vested, number of shares (in shares) | shares	(135,328)
Vested, Nonvested, Weighted Average Grant-Date Fair Value (in dollars per share) | $ / shares	$ 3.94
Forfeited, Non-vested, number of shares (in shares) | shares	(200)
Forfeited, Nonvested, Weighted Average Grant-Date Fair Value (in dollars per share) | $ / shares	$ 3.62
Balance, Non-vested, number of shares (in shares) | shares	224,091
Nonvested, Weighted Average Grant-Date Fair Value (in dollars per share) | $ / shares	$ 3.72