Note 14 - Stock-based Compensation - Summary of Stock-based Compensation Expense (Details) - USD ($)	12 Months Ended
Jul. 31, 2021	Jul. 31, 2020
Share-based Payment Arrangement, Noncash Expense, Total	$ 5,471,578	$ 3,493,218
Common stock issued	1,594,246	1,122,917
Settlement of share issuance obligation		(15,189)
Consultants [Member]
Common stock issued to consultants	876,695	539,552
Amortization of expenses	288,603	240,912
Share-based Payment Arrangement, Noncash Expense, Total	1,165,298	780,464
Management [Member]
Amortization of expenses	773,583	644,516
Share-based Payment Arrangement, Noncash Expense, Total	2,124,143	1,452,518
Common stock issued	135,000	225,217
Management [Member] \| Restricted Stock Units (RSUs) and Performance Restricted Stock Units (PRSUs) [Member]
Amortization of expenses	1,215,560	582,785
Employees [Member]
Amortization of expenses	982,179	640,011
Share-based Payment Arrangement, Noncash Expense, Total	2,182,137	1,275,425
Common stock issued	$ 1,199,958	$ 635,414

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