Note 17 - Stock-based Compensation - Number of Shares Issued and Cash Received upon Exercise of the Stock Options (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2021
Number of Options Exercised on Cash Basis (in shares)	365,537	872,580	1,734,127
Number of Options Exercised on Forfeiture Basis (in shares)	3,630,360	1,855,918	2,970,878
Total Number of Options Exercised (in shares)	3,995,897	2,728,498	4,705,005
Number of Shares Issued on Cash Exercise (in shares)	365,537	872,580	1,734,127
Number of Shares Issued on Forfeiture Basis (in shares)	1,986,007	1,279,515	1,592,128
Total Number of Shares Issued Upon Exercise of Options (in shares)	2,351,544	2,152,095	3,326,255
Cash Received from Exercise of Stock Options	$ 553	$ 934	$ 1,916
Total Intrinsic Value of Options Exercised	$ 8,867	$ 8,336	$ 6,882