Note 7 - Leases - Future Payments Due (Details)	Jul. 31, 2022 USD ($)
2022, operating	$ 108,683	[1]
2022, finance	10,717
2023, operating	382,716
2023, finance	42,868
2024, operating	331,438
2024, finance	42,868
2025, operating	55,023
2025, finance	42,868
2026, operating	0
2026, finance	55,715
Total undiscounted operating lease payments	877,860
Total undiscounted finance lease payments	195,036
Present value discount, operating	(49,349)
Present value discount, finance	(19,732)
Accounts Payable and Accrued Liabilities and Noncurrent Liabilities [Member]
Total lease liability, operating	828,511
Total lease liability, finance	$ 175,304

[1] (1) Remaining nine months of fiscal year 2022