Note 17 - Stock-based Compensation (Tables)

12 Months Ended

Jul. 31, 2023

Notes Tables

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Year Ended July 31,
	2023 (1)			2022			2021
Expected Risk Free Interest Rate		4.14	%		2.73	%		0.70	%
Expected Volatility		79.43	%		78.75	%		72.57	%
Expected Life in Years		4.90			4.96			5.00
Expected Dividend Yield		0	%		0	%		0	%
Weighted-Average Grant Date Fair Value	$	2.18		$	2.45		$	1.30

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

	Number of Stock Options			Weighted Average Exercise Price
Balance, July 31, 2020		15,514,750		$	1.13
Granted		959,588			2.21
Exercised		(4,705,005	)		1.09
Expired		(1,365,000	)		1.48
Balance, July 31, 2021		10,404,333			1.21
Granted		1,279,692			3.80
Exercised		(2,728,498	)		1.17
Expired		(75,000	)		2.50
Balance, July 31, 2022		8,880,527			1.58
Granted		3,507,004			2.46
Exercised		(3,995,897	)		1.63
Forfeited		(24,651	)		3.18
Expired		(40,000	)		1.53
Balance, July 31, 2023		8,326,983		$	1.92

Cash Proceeds Received and Tax Benefit from Share-Based Payment Awards [Table Text Block]

	Year Ended July 31,
	2023		2022		2021
Number of Options Exercised on Cash Basis		365,537		872,580		1,734,127
Number of Options Exercised on Forfeiture Basis		3,630,360		1,855,918		2,970,878
Total Number of Options Exercised		3,995,897		2,728,498		4,705,005
Number of Shares Issued on Cash Exercise		365,537		872,580		1,734,127
Number of Shares Issued on Forfeiture Basis		1,986,007		1,279,515		1,592,128
Total Number of Shares Issued Upon Exercise of Options		2,351,544		2,152,095		3,326,255
Cash Received from Exercise of Stock Options	$	553	$	934	$	1,916
Total Intrinsic Value of Options Exercised	$	8,867	$	8,336	$	6,882

Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block]

	Number of Unvested Stock Options			Weighted Average Grant-Date Fair Value
Balance, July 31, 2020		6,797,471		$	0.46
Granted		959,588			1.30
Vested		(3,865,852	)		0.47
Balance, July 31, 2021		3,891,207			0.66
Granted		1,279,692			2.45
Vested		(2,984,745	)		0.59
Balance, July 31, 2022		2,186,154			1.79
Issuance of Replacement Options (Note 3)		2,301,750			1.75
Granted		1,205,254			2.18
Forfeited		(24,651	)		2.00
Vested		(3,865,242	)		1.66
Balance, July 31, 2023		1,803,265		$	2.28

Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block]

	Options Outstanding						Options Exercisable
Range of Exercise	Outstanding at		Weighted Average		Weighted Average Remaining Contractual Term		Exercisable at		Weighted Average		Weighted Average Remaining Contractual Term
Prices	July 31, 2023		Exercise Price		(Years)		July 31, 2023		Exercise Price		(Years)
$0.80 to $0.99		3,513,999	$	0.92		6.52		3,513,999	$	0.92		6.52
$1.00 to $1.99		1,390,500		1.12		6.72		1,390,500		1.12		6.72
$2.00 to $2.99		868,189		2.23		7.85		865,689		2.22		7.85
$3.00 to $3.99		2,549,295		3.62		8.91		752,280		3.79		7.89
$4.00 to $4.23		5,000		4.23		9.23		1,250		4.23		9.23
		8,326,983	$	1.92		7.43		6,523,718	$	1.47		6.90

Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]

	Number of Restricted			Weighted Average
	Stock Units			Grant Date Fair Value
Balance, July 31, 2020		1,615,000		$	0.92
Granted		407,617			2.15
Vested		(1,025,005	)		0.91
Balance, July 31, 2021		997,612			1.42
Granted		346,790			4.03
Vested		(508,368	)		1.25
Balance, July 31, 2022		836,034			2.61
Granted		620,386			3.32
Vested		(464,985	)		2.02
Forfeited		(11,935	)		3.98
Balance, July 31, 2023		979,500		$	3.32

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

	Number of Restricted		Grant Date		Remaining Life		Aggregate Intrinsic
Grant Date	Stock Units		Fair Value		(Years)		Value
July 21, 2021		135,875	$	2.15		0.98	$	489
May 01, 2022		39,216		4.25		1.75		141
July 29, 2022		184,023		3.98		2.00		662
July 31, 2023		620,386		3.32		3.00		2,233
		979,500	$	3.32		2.48	$	3,525

Schedule of Restricted Stock Units Activity [Table Text Block]

	Year Ended July 31,
	2023		2022		2021
Number of RSUs vested		464,985		508,368		1,025,005
Number of net RSU shares issued		261,232		267,681		536,361
Number of RSU shares forfeited as payments of withholding amount		203,753		240,687		488,644

Schedule of Performance Based Restricted Stock Units, Valuation Assumptions [Table Text Block]

	Year Ended July 31,
	2023			2022			2021
Expected Risk Free Interest Rate		4.52	%		2.80	%		0.39	%
Expected Volatility		84.56	%		90.90	%		78.03	%
Expected Dividend Yield		0	%		0	%		0	%
Expected Life in Years		3.00			3.00			3.00
Correlation		81.22	%		76.89	%		66.02	%
Grant Price	$	3.32		$	3.98		$	2.15
Grant Date Fair Value	$	3.35		$	4.80		$	2.48

Schedule of Nonvested Performance-Based Units Activity [Table Text Block]

	Number of Unvested			Weighted Average Grant Date
	PRSUs			Fair Value
Balance, July 31, 2020		757,501		$	1.15
Granted		492,950			2.48
Balance, July 31, 2021		1,250,451			1.67
Granted		241,632			4.80
Vested		(757,501	)		1.15
Balance, July 31, 2022		734,582			3.24
Granted		551,923			3.35
Balance, July 31, 2023		1,286,505		$	3.29

Share-Based Payment Arrangement, Cost by Plan [Table Text Block]

	Year Ended July 31,
	2023		2022		2021
Stock-Based Compensation for Consultants
Common stock issued to consultants	$	445	$	770	$	877
Amortization of stock option expenses		561		220		288
		1,006		990		1,165
Stock-Based Compensation for Management
Common stock issued to management		-		-		135
Amortization of stock option expenses		400		471		774
Amortization of RSU and PRSU expenses		1,370		1,035		1,215
		1,770		1,506		2,124
Stock-Based Compensation for Employees
Common stock issued to employees		888		1,187		1,200
Amortization of stock option expenses		1,727		960		982
Amortization of RSU expenses		132		38		-
		2,747		2,185		2,182
	$	5,523	$	4,681	$	5,471