Note 17 - Stock-based Compensation - Forfeited as Payment of Tax Withhold (Details) - Restricted Stock Units (RSUs) [Member] - shares	12 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2021
Number of RSUs vested (in shares)	464,985	508,368	1,025,005
Number of net RSU shares issued (in shares)	261,232	267,681	536,361
Number of RSU shares forfeited as payments of withholding amount (in shares)	203,753	240,687	488,644