Note 10 - Restricted Cash (Tables)

12 Months Ended

Jul. 31, 2023

Notes Tables

Restrictions on Cash and Cash Equivalents [Table Text Block]

	July 31, 2023		July 31, 2022
Balance, beginning of year	$	7,251	$	2,038
Restricted cash received from U1A Acquisition (Note 5)		-		13,755
(Release) addition of surety bond collateral		-		(8,550	)
Interest received		-		8
Balance, end of year	$	7,251	$	7,251

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

	July 31, 2023		July 31, 2022		July 31, 2021
Cash and cash equivalents	$	45,614	$	32,536	$	44,313
Restricted cash		7,251		7,251		2,038
Total cash, cash equivalents and restricted cash	$	52,865	$	39,787	$	46,351