Note 9 - Long-term Debt - Long-term Debt Consisted of the Following: (Details) - USD ($)	Jan. 31, 2019	Dec. 05, 2018	Oct. 31, 2018	Jul. 31, 2018
Long-term Debt, Gross	$ 20,000,000	$ 20,000,000		$ 20,000,000
Unamortized discount	(1,198,906)			(465,026)
Long-term debt, net of unamortized discount	18,801,094			19,534,974
Long-term Debt, Current Maturities, Total			$ 15,000,000	10,000,000
Long-term debt, net of current portion	$ 18,801,094			$ 9,534,974