Note 5 - Restricted Cash (Tables)

3 Months Ended

Oct. 31, 2019

Notes Tables

Restrictions on Cash and Cash Equivalents [Table Text Block]

	October 31, 2019		July 31, 2019
Restricted cash, beginning of period	$	1,821,392	$	1,789,899
Interest received		7,529		31,493
Restricted cash, end of period	$	1,828,921	$	1,821,392

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

	October 31, 2019		October 31, 2018
Cash and cash equivalents	$	13,112,069	$	9,545,339
Restricted cash		1,828,921		1,796,529
Total cash, cash equivalents and restricted cash	$	14,940,990	$	11,341,868