Note 19 - Income Taxes - Components of Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Income (Loss) before income taxes	$ 5,247	$ (14,817)	$ (14,616)
Corporate tax rate	23.95%	21.83%	21.72%
Expected tax expense (recovery)	$ 1,257	$ (3,235)	$ (3,175)
Foreign tax rate differences	158	77	86
Permanent differences	(326)	(217)	170
Prior year true-up	6	(270)	118
Change in state tax rate	(460)	(406)	(553)
Foreign exchange rate differences	(4)	(56)	17
Other	188	163	72
Change in valuation allowance	(824)	3,940	3,233
Tax adjustment from operations	(5)	(4)	(32)
Unrealized loss, other comprehensive loss	0	0	26
Deferred tax benefits	$ (5)	$ (4)	$ (6)