Note 5 - Restricted Cash (Tables)

12 Months Ended

Jul. 31, 2020

Notes Tables

Restrictions on Cash and Cash Equivalents [Table Text Block]

	July 31, 2020		July 31, 2019
Restricted cash, beginning of period	$	1,821,392	$	1,789,899
Interest received		17,824		31,493
Restricted cash, end of period	$	1,839,216	$	1,821,392

Schedule of Cash and Cash Equivalents and Restricted Cash [Table Text Block]

	July 31, 2020		July 31, 2019
Cash and cash equivalents	$	5,147,703	$	6,058,186
Restricted cash		1,839,216		1,821,392
Total cash, cash equivalents and restricted cash	$	6,986,919	$	7,879,578