Note 5 - Restricted Cash (Tables)

6 Months Ended

Jan. 31, 2020

Notes Tables

Restrictions on Cash and Cash Equivalents [Table Text Block]

	January 31, 2020		July 31, 2019
Restricted cash, beginning of period	$	1,821,392	$	1,789,899
Interest received		13,354		31,493
Restricted cash, end of period	$	1,834,746	$	1,821,392

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

	January 31, 2020		January 31, 2019
Cash and cash equivalents	$	10,272,315	$	3,990,524
Restricted cash		1,834,746		1,804,328
Total cash, cash equivalents and restricted cash	$	12,107,061	$	5,794,852