Note 7 - Restricted Cash (Tables)

6 Months Ended

Jan. 31, 2022

Notes Tables

Restrictions on Cash and Cash Equivalents [Table Text Block]

	January 31, 2022		July 31, 2021
Restricted cash, beginning of period	$	2,037,677	$	1,839,216
Restricted cash received from U1A Acquisition		13,754,533		-
Additional surety bond collateral		-		198,377
Interest received		64		84
Restricted cash, end of period	$	15,792,274	$	2,037,677

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

	January 31, 2022		January 31, 2021
Cash and cash equivalents	$	22,663,251	$	8,713,193
Restricted cash		15,792,274		1,839,300
Total cash, cash equivalents and restricted cash	$	38,455,525	$	10,552,493