Note 11 - Share-based Compensation (Tables)

3 Months Ended

Aug. 31, 2024

Notes Tables

Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

	Three months ended August 31,					Nine months ended August 31,
	2024			2023		2024		2023
Stock options	$	485		$	1,170	$	3,134	$	3,432
Performance share unit plan		(39	)		995		1,982		2,926
Deferred share unit plan		69			60		203		168
	$	515		$	2,225	$	5,319	$	6,526

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

	Number of stock options			Weighted- average exercise price per share		Weighted- average remaining contractual term (years)		Aggregate intrinsic value
November 30, 2023		7,606,200		$	6.59
Granted		3,088,900			4.12
Exercised		(890,000	)		3.67
Forfeited		(765,663	)		4.96
August 31, 2024		9,039,437		$	6.17		2.59	$	373
Vested and exercisable as of August 31, 2024		4,666,285		$	7.41		1.49	$	—

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

	Nine months ended August 31,
	2024			2023
Weighted-average assumptions used to value stock option awards:
Expected volatility		48.7	%		48.4	%
Expected term of options (years)		4			4
Expected dividend rate		—			—
Risk-free interest rate		4.29	%		3.85	%
Expected forfeiture rate		3.0	%		2.8	%
Weighted-average grant-date fair value	$	1.76		$	2.40
Intrinsic value of options exercised	$	471		$	2,024
Cash received from options exercised	$	—		$	—

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

	Number of PSU awards			Weighted- average grant day fair value per award		Aggregate intrinsic value
November 30, 2023		1,605,500		$	6.89
Granted		886,800			4.20
Vested		(200,300	)		5.62
Expired		(319,300	)		9.92
Forfeited		(339,200	)		5.33
August 31, 2024		1,633,500		$	5.32	$	1,827