Note 12 - Stock-based Compensation (Tables)

3 Months Ended

Oct. 31, 2023

Notes Tables

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

	Number of Stock			Weighted Average
	Options			Exercise Price
Balance, July 31, 2023		8,326,983		$	1.92
Granted		17,500			5.04
Exercised		(608,182	)		1.69
Cancelled/Forfeited		(191,259	)		1.59
Expired		(27,000	)		3.69
Balance, October 31, 2023		7,518,042			1.94

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

	Three Months Ended October 31,
	2023		2022
Number of Options Exercised on Cash Basis		189,250		138,537
Number of Options Exercised on Forfeiture Basis		418,932		2,192,685
Total Number of Options Exercised		608,182		2,331,222
Number of Shares Issued on Cash Exercise		189,250		138,537
Number of Shares Issued on Forfeiture Basis		256,611		1,266,064
Total Number of Shares Issued Upon Exercise of Options		445,861		1,404,601
Cash Received from Exercise of Stock Options	$	264	$	206
Total Intrinsic Value of Options Exercised	$	2,030	$	5,595

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

	Number of Unvested			Weighted Average
	Stock Options			Grant-Date Fair Value
Balance, July 31, 2023		1,803,265		$	2.28
Granted		17,500			3.36
Cancelled/Forfeited		(12,300	)		2.37
Vested		(133,062	)		2.18
Balance, October 31, 2023		1,675,403			2.29

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

Exercise Price	4.722 to5.2020
Expected Risk Free Interest Rate	4.39% to 4.67%
Expected Volatility	79.42% to 79.53%
Expected Life in Years	5
Expected Dividend Yield	0.00%

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

	Options Outstanding						Options Exercisable
					Weighted						Weighted
					Average						Average
Range of			Weighted		Remaining				Weighted		Remaining
Exercise	Outstanding at		Average		Contractual		Exercisable at		Average		Contractual
Prices	October 31, 2023		Exercise Price		Term (Years)		October 31, 2023		Exercise Price		Term (Years)
$0.80 to $0.99		3,013,687	$	0.92		6.23		3,013,687	$	0.92		6.23
$1.00 to $1.99		1,390,500		1.11		6.47		1,390,500		1.11		6.47
$2.00 to $2.99		715,344		2.24		7.57		715,344		2.24		7.57
$3.00 to $3.99		2,376,011		3.60		8.84		720,608		3.70		8.27
$4.00 to $4.23		10,000		4.48		9.42		2,500		4.23		8.98
$5.00 to $5.20		12,500		5.16		9.91		-		-		-
		7,518,042	$	1.94		7.23		5,842,639	$	1.47		6.70

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

	Number of
	Restricted Stock		Grant Date		Remaining Life		Aggregate
Grant Date	Units		Fair Value		(Years)		Intrinsic Value
July 21, 2021		135,875		2.15		0.72		808
May 1, 2022		39,216		4.25		1.50		233
July 29, 2022		184,023		3.98		1.75		1,095
July 31, 2023		620,386		3.32		2.75		3,691
		979,500	$	3.32		2.23	$	5,827

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

	Three Months Ended
	October 31,
	2023		2022
Stock-Based Compensation for Consultants
Common stock issued to consultants	$	-	$	148
Amortization of stock option expenses		121		228
		121		376
Stock-Based Compensation for Management
Amortization of stock option expenses		208		133
Amortization of RSU and PRSU expenses		594		354
		802		487
Stock-Based Compensation for Employees
Common stock issued to employees		-		247
Amortization of stock option expenses		632		673
Amortization of RSU expenses		17		38
		649		958
	$	1,572	$	1,821