Note 6 - Restricted Cash (Tables)

3 Months Ended

Oct. 31, 2023

Notes Tables

Restrictions on Cash and Cash Equivalents [Table Text Block]

	October 31, 2023		July 31, 2023
Balance, beginning of year	$	7,251	$	7,251
Balance, end of year	$	7,251	$	7,251

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

	October 31, 2023		July 31, 2023
Cash and cash equivalents	$	50,240	$	45,614
Restricted cash		7,251		7,251
Total cash, cash equivalents and restricted cash	$	57,491	$	52,865